** Add your Tesla coil here **
Tesladownunder, Fri Feb 03 2006, 01:06AM ** Add your Tesla coil here **
This is the Tesla coil list where you can show your coil and compare with others. There were 200 posts on the old 4HV forum which are here at old.4hv After 211 posts it contains around 164 different coils. There are 92 spark gap coils (SGTC), 54 solid state coils (SSTC) and 17 vacuum tube coils (VTTC). (Of these 90+47+16 respectively were from the old board at 200 posts.)
The 3 Rules to keep it consistent and readable:
Each coil to have only 1 page of info (ie fits on your computer screen). Brief is best.
Each coil to have only 2 photos (do not double post for the second photo).
Only coil details and photos to be posted. Direct any queries direct to the person or in a new thread.
A coil is defined by its secondary (change of toroid isn't a new coil)
Enter as many coils as you wish. Beginners coils are welcome and this log is designed to be helpful for beginners.
---------------------
CONTENTS (in progress)
Page 1
Post 0 Tesladownunder Sparkgap TC (SGTC) small. 2inch sparks
Post 1 EastVoltResearch SSTC 8-12 inches
Post 2 EastVoltResearch SSTC 24 inches
Post 3 Tesladownunder SGTC 20yo. 2inch sparks Ferrite cored
Post 4 EastVoltResearch SGTC 48 inches 15/60 NST SRSG
Post 5 EastVoltResearch SGTC 13 inches 4/20 NST SRSG
Post 6,7 Steve Connor SSTC OLTCII 73inches
Post 8 EastVoltResearch SSTC Stereo Plasmasonic 1
Post 9, 10 Extreme Electronics AD-OLTC SSTC 23 inches
Post 11, 12 mattrg DRSSTC 25 inches
Post 13, 14 EastVoltResearch SGTC 60 inches Potential transformer 3.5kW
Post 16 Jim Mitchell Tiny ISSTC
Post 17 Tesladownunder SGTC 48 inches 4-MOT
Post 18 Scorper SSTC 11inches
Post 19 Vasil SGTC 36 inches potential transformer
Post 20 Vasil VTTC 18 inches
Post 21 Vasil Royer SSTC 21 inches
Post 22 Steve Connor SGTC 40 inches
Post 23 Steve Connor SGTC 17 inches
Post 24 Hammertone 3KVA display coil
Post 25 Cesiumsponge VTTC 17inches
Post 26 Jimmy H DRSSTC 93 inches
Post 27 Steve Ward DRSSTC 120 inches
Post 28 Steve Ward DRSSTC 24 inches
Post 29 EastVoltResearch DRSSTC 80 inches
Page 2
Post 30 EastVoltResearch DRSSTC 80 inches
Post 31, 32 Vasil Ignition coil powered 4 inches
Post 33 Vasil ISSTC 8 inches
Post 34 Vasil VTTC 8 inches
Post 35 Vasil DRSSTC 10 inches
Post 36 Vasil SGTC 24 inches
Post 37 Dan Strother SSTC
Post 38, 39 Teslacoiler VTTC 16 inches
Post 40 Idreamz SGTC 10 inches
Post 41, 42, 43 EastVoltResearch VTTC 28 inches
Post 44 Tesladownunder SGTC 60 inches
Post 45, 46 Teslacoiler 55 inches
Post 47 Colin Heath DRSSTC 26 inches
Post 48 evolve000 SGTC 36 inches
Post 49 Kalenedrael SGTC, Twin, SSTC
Post 50, 51 EastVoltResearch DRSSTC 72 inches
Post 52 hilo90mhz SGTC 36 inches
Post 53 hilo90mhz SSTC 8 inches
Post 54 Tesladownunder SGTC 96 inches
Post 55, 56 lucasmtong SGTC 16 inches
Post 57 Dave47 SGTC 20 inches
Post 58 DBH SGTC 8 inches
Post 59 Alexey SGTC 44 inches
Page 3
Post 60 Alexey SGTC 44 inches
Post 61,62 Lucas SGTC 48 inches
Post 63 ultimax SGTC
Post 64, 65 Tesladownunder SGTC 48 inches
Post 66 Cree SGTC 4 inches
Post 67 DBH SGTC 9 inches
Post 68 Pvt. Sparky SGTC 42 inches
Post 69 - 71 Pvt. Sparky SSTC 12 inches
Post 72, 73 Dr Resonance SGTC 26ft
Post 74 Otto SGTC
Post 75 Pvt. Sparky SGTC
Post 76 Pvt. Sparky SGTC 4 inches
Post 77, 78 Pvt. Sparky SGTC 19 inches
Post 79 Cree SGTC 5 inches
Post 80, 81 Extreme Electronics SGTC 36 inches
Post 82, 83 Hidden Dragon SGTC 2.5 inches
Post 84,85, 92 Cree SGTC 7.5 inches
Post 86, 87 Fry SGTC 20 inches
Post 88, 89 Fry SGTC 72 inches
Page 4
Post 90, 91 Edenberg (Antarctic) SGTC 60 inches
Post 93, 94 Tesladownunder SSTC (Royer) 1 inch
Post 95 Cree SGTC 11 inches
Post 96, 97 Extreme Electronics SGTC Magnifier 9 inches
Post 98 kv SGTC 18 inches
Post 99-101 Pvt Sparky VTTC
Post 102 Tesladownunder SSTC SIDAC 2 inches
Post 103, 104 Reaching SGTC 32 inches
Post 105 Dit Bestand SGTC 37 inches
Post 106 Reaching SGTC mini
Post 107 Hammertone SGTC Museum coil
Post 108, 109 Syd Klinge Cauac 100kVA ? 20 feet
Post 110, 111 Tesladownunder SGTC Wire roll 3 inches
Post 112 Edy19 SGTC 10 inches
Post 113 Nik SGTC 8 inches
Post 114, 115 Robert Golka SGTC ? 32 feet
Post 116 Reaching SSTC 12inches
Post 117 John Grun SGTC
Post 118, 119 Scorper SSTC 20 inches
Page 5
Post 120 Reaching SSTC 8 inches
Post 121, 122 cTc-Basti SSTC 6inches
Post 123 StarWarsFanatic SGTC
Post 124 Tom SGTC 15 inches
Post 125, 126 Tesladownunder VTTC 4 inches
Post 127,128 Tesladownunder Unintentional TC 1/2 inch
Post 129 kv SGTC 36 inches
Post 130 Boshi SGTC 12 inches
Post 131 ICC SGTC 8 inches
Post 132 Tesla Coiler VTTC cigarette lighter
Post 133, 134 Tesla Coiler SSTC Royer 14 inches
Post 135, 136 Colin 99 SSTC 30 inches
Post 137 Connor McSteve SSTC Mjöllnir 34 inches
Post 138 Reaching SSTC 18 inches
Post 139 d73 SGTC
Post 140, 141 RSmith VTTC ? 8 inches
Post 142 Reaching SGTC 28 inches
Post 143 Connor McSteve SGTC ? 48 inches
Post 144, 145 Mattrg SGTC
Post 146, 147 sf8389 SGTC 20 inches
Post 148 Philer SGTC 60 inches
Post 149 Ronald SGTC
Page 6
Post 150, 151 Ronald VTTC
Post 152 Tesladownunder Antique TC
Post 153 Tesla Coiler VTTC
Post 154 Nick Bernsden SGTC 60 inches
Post 155 Nick Bernsden SGTC 96 inches
Post 156, 157 Wirenut SGTC 72 inches
Post 158 Reaching DRSSTC 60 inches
Post 159 Avalanche SSTC
Post 160 Akota SGTC 36 inches
Post 161 DBH SGTC
Post 162 Rayer VTTC
Post 163 Rayer SGTC
Post 164 Rayer SSTC 15 inches
Post 165 Rayer SSTC
Post 166 Rayer
Post 167 Reaching VTTC 2 inches
Post 168, 169 SteelWolf 44 inches
Post 170, 171 Reaching SSTC 9 inches
Post 172 WilliamN SSTC
Post 173 Reaching SSTC 18 inches
Post 174 Part Scavenger SGTC 49 inches
Post 175 c4r0 SGTC 6 inches
Post 176 Plasmaniac SGTC 12 inches
Post 177 Avalanche SSTC 8 inches
Post 178 WilliamN SSTC 20 inches
Post 179 ... VTTC
Page 7
Post 180, 181 Tesladownunder SGTC 25 inches
Post 182 Reaching RDSSTC 36 inches
Post 183, 184 Blackplasma SSTC
Post 185 ... VTTC 5 inches
Post 186 Edy19 SSTC 16 inches
Post 187 ... VTTC 3 inches
Post 188 ... SGTC 4 inches
Post 189 Vasil DRSSTC 20 inches
Post 190 Vasil DRSSTC 40 inches
Post 191 Vasil SGTC 25 inches
Post 192 Vasil DRSSTC 22 inches
Post 193 Vasil DRSSTC Ignition coil 6 inches
Post 194 Vasil SGTC 20 inches
Post 195 Vasil SGTC Oudin
Post 196 Vasil SGTC Flyback
Post 197 Vasil SGTC Flyback 30 inches
Post 198 The last post of the old 4HV (after 90 SGTC, 47 SSTC, 16 VTTC ) ................
Post 199 Extreme Electronics DRSSTC 10 inches
Post 200 Bennem DRSSTC
Post 201 JimG DRSSTC
Post 202 Terry Fritz OLTC
Post 203 Cesiumsponge VTTC
Post 204 WilliamN DRSSTC 20 inches
Post 205 Avalanche SSTC 4 inches
Post 206 Avalanche ZVS SSTC 3 inches
Post 207 McFluffin SGTC
Post 208 Steve Ward SSTC 33 inches
Post 209 Reaching DRSSTC 48 inches
Page 8
« Last Edit: Yesterday at 07:48:06pm by tesladownunder » Report to moderator Logged
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:03PM
Post #1 EastVoltResearch Sept28 2004
This is my very first tesla coil ever. Its a standard run-o-the-mill open loop full-bridge based SSTC running from 120VAC (half-rectified)
This is the coil that began it all.
Maximum output arc length was about 8-12 inches.
Full Details can be found here:
Tesladownunder, Sat Feb 04 2006, 05:03PM
Post #1 EastVoltResearch Sept28 2004
This is my very first tesla coil ever. Its a standard run-o-the-mill open loop full-bridge based SSTC running from 120VAC (half-rectified)
This is the coil that began it all.
Maximum output arc length was about 8-12 inches.
Full Details can be found here:
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:06PM
EastVoltResearch Sept28 2004
Here is the second SSTC i've built. This was done almost immediately following SSTC 1 and the tesla bug had already bit me quite hard.
This was another TL494 (open loop) based full-bridge SSTC that could run up to 280VAC. Maximum arc length was about 24".
This coil has since seen the scrap pile.
Complete Details can be found here:
Tesladownunder, Sat Feb 04 2006, 05:06PM
EastVoltResearch Sept28 2004
Here is the second SSTC i've built. This was done almost immediately following SSTC 1 and the tesla bug had already bit me quite hard.
This was another TL494 (open loop) based full-bridge SSTC that could run up to 280VAC. Maximum arc length was about 24".
This coil has since seen the scrap pile.
Complete Details can be found here:
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:07PM
Tesladownunder Sept28 2004
My earliest (intentional) Telsa coil. I was given an old transformer from a dump which in retrospect was an old unpotted NST (neon sign transformer). I used a single static gap with a 12 inch ferrite cored coil of 11 primary and 100 turns secondary giving 2 inch sparks with 26 small ceramic capacitors with 2 strings of 13 x 0.01 uF at 3 kV each. It ran nicely for about 20 years! This photo is a mock up with most of the original parts.
Peter
Edit: fixed broken IMG tag.
Tesladownunder, Sat Feb 04 2006, 05:07PM
Tesladownunder Sept28 2004
My earliest (intentional) Telsa coil. I was given an old transformer from a dump which in retrospect was an old unpotted NST (neon sign transformer). I used a single static gap with a 12 inch ferrite cored coil of 11 primary and 100 turns secondary giving 2 inch sparks with 26 small ceramic capacitors with 2 strings of 13 x 0.01 uF at 3 kV each. It ran nicely for about 20 years! This photo is a mock up with most of the original parts.
Peter
Edit: fixed broken IMG tag.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:09PM
EastVoltResearch Sept28 2004
Here is my first conventional spark gap coil.
Specifications:
4" Secondary
15kV/60mA NST (Franceformer)
0.0257uF LTR sized Primary Capacitor
Sychronous Rotary Spark Gap (SRSG)
20" x 5" Toroid (D&M Voltage)
This coil output about 48" arcs.
Full Details can be found here:
It has since been scrapped and my wife is using the table as a flower pot stand!
Tesladownunder, Sat Feb 04 2006, 05:09PM
EastVoltResearch Sept28 2004
Here is my first conventional spark gap coil.
Specifications:
4" Secondary
15kV/60mA NST (Franceformer)
0.0257uF LTR sized Primary Capacitor
Sychronous Rotary Spark Gap (SRSG)
20" x 5" Toroid (D&M Voltage)
This coil output about 48" arcs.
Full Details can be found here:
It has since been scrapped and my wife is using the table as a flower pot stand!
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:11PM
EastVoltResearch Sept28 2004
Here is my Mini-Katz conventional spark gap coil.
It uses a modified 4kV/20mA (Franceformer) NST which is modified to output
38mA current.
Output arc now is approximately 13-14 inches. This coil is my most popular coil and has seen the most demonstrations ranging from Corporate to Educational Events, Boy Scouts, and Church Events.
Full Details can be found here:
Tesladownunder, Sat Feb 04 2006, 05:11PM
EastVoltResearch Sept28 2004
Here is my Mini-Katz conventional spark gap coil.
It uses a modified 4kV/20mA (Franceformer) NST which is modified to output
38mA current.
Output arc now is approximately 13-14 inches. This coil is my most popular coil and has seen the most demonstrations ranging from Corporate to Educational Events, Boy Scouts, and Church Events.
Full Details can be found here:
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:12PM
Steve Connor Sept 28 2004
The mighty OLTC II! This is my best performing coil but also the least practical. It's so noisy and dangerous that I hardly ever get the chance to run it.
It is a solid-state coil powered directly from the 240V line which is rectified and voltage doubled to give around 600V DC. This supplies a circuit which is just like an ordinary DC Tesla coil, except the spark gap is replaced by two 600A IGBTs connected in parallel. Due to the low voltage, the primary circuit looks quite different to a SGTC- it has a 14uF cap bank and a 10" single turn primary.
Tesladownunder, Sat Feb 04 2006, 05:12PM
Steve Connor Sept 28 2004
The mighty OLTC II! This is my best performing coil but also the least practical. It's so noisy and dangerous that I hardly ever get the chance to run it.
It is a solid-state coil powered directly from the 240V line which is rectified and voltage doubled to give around 600V DC. This supplies a circuit which is just like an ordinary DC Tesla coil, except the spark gap is replaced by two 600A IGBTs connected in parallel. Due to the low voltage, the primary circuit looks quite different to a SGTC- it has a 14uF cap bank and a 10" single turn primary.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:13PM
Steve Connor Sept 28 2004
The pic below (taken by thedatastream) shows the 73" spark achieved at the Derby Teslathon this year. To do this I had to use an extra toroid and increase the tank cap to 18uF. (With the single toroid I get around 60")
At the time this coil was being built we didn't know whether OLTCs or DRSSTCs were better. Now we know so I am going to try building a DRSSTC with the same resonator and see how much bigger the sparks get.
Tesladownunder, Sat Feb 04 2006, 05:13PM
Steve Connor Sept 28 2004
The pic below (taken by thedatastream) shows the 73" spark achieved at the Derby Teslathon this year. To do this I had to use an extra toroid and increase the tank cap to 18uF. (With the single toroid I get around 60")
At the time this coil was being built we didn't know whether OLTCs or DRSSTCs were better. Now we know so I am going to try building a DRSSTC with the same resonator and see how much bigger the sparks get.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:15PM
EastVoltResearch Sept28 2004
Here is one of the first Stereo audio modulated SSTC systems capable of producing full-range audio (approx. 100Hz to 20kHz), The PlasmaSonic I system.
The audio modulated system receives its music source from a CD player and has two identical coils (operating at slightly different frequencies) and produces stunning quality audio and incredible imaging and lower frequency (bass) response.
The key to full-range reproduction was the stereo coil set-up as well as custom designed electrodes which maximize the amount of air that is moved during audio reproduction (although hiss is increased)
Complete Details can be found here:
PlasmaSonic I Presentation (4.6MB PDF)
PlasmaSonic I Video (10MB)
Tesladownunder, Sat Feb 04 2006, 05:15PM
EastVoltResearch Sept28 2004
Here is one of the first Stereo audio modulated SSTC systems capable of producing full-range audio (approx. 100Hz to 20kHz), The PlasmaSonic I system.
The audio modulated system receives its music source from a CD player and has two identical coils (operating at slightly different frequencies) and produces stunning quality audio and incredible imaging and lower frequency (bass) response.
The key to full-range reproduction was the stereo coil set-up as well as custom designed electrodes which maximize the amount of air that is moved during audio reproduction (although hiss is increased)
Complete Details can be found here:
PlasmaSonic I Presentation (4.6MB PDF)
PlasmaSonic I Video (10MB)
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:17PM
Extreme Electronics Sept 28 2004
My best coil so far, not because it give long sparks, just cause it sounds and looks cool..
The AD-OLTC
Specs:-
The Primary coil 2 turns of 5mm copper tubeing .
Primary cap 2uF MMC
The Secondary 1920 turns 0.225mm enameled copper wire wound on a 4" former , 19" tall..
The Topload 10" Stainless steel sphere. (Two salad bowls from Ikea, but don't let on)
Drive 4 x IGBT's, fired Alternately in pairs.
Max spark length 23"
BPS 10hz - 10Khz
Will also "play" Twinkle Twinkle little star..
Circuit
More Details
and click on AD-OLTC button
Picture of the AD-OLTC doing 23" to a Flourecent tube at the Nottingham Gaussfest, thanks to Adam for the picture.
Edit: fixed broken IMG tag.
Tesladownunder, Sat Feb 04 2006, 05:17PM
Extreme Electronics Sept 28 2004
My best coil so far, not because it give long sparks, just cause it sounds and looks cool..
The AD-OLTC
Specs:-
The Primary coil 2 turns of 5mm copper tubeing .
Primary cap 2uF MMC
The Secondary 1920 turns 0.225mm enameled copper wire wound on a 4" former , 19" tall..
The Topload 10" Stainless steel sphere. (Two salad bowls from Ikea, but don't let on)
Drive 4 x IGBT's, fired Alternately in pairs.
Max spark length 23"
BPS 10hz - 10Khz
Will also "play" Twinkle Twinkle little star..
Circuit
More Details
and
click on AD-OLTC buttonPicture of the AD-OLTC doing 23" to a Flourecent tube at the Nottingham Gaussfest, thanks to Adam for the picture.
Edit: fixed broken IMG tag.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:18PM
Extreme Electronics Sept 28 2004
Picture of the controller and a view of the primary, caps, IGBT's etc, with the secondary removed..
Tesladownunder, Sat Feb 04 2006, 05:18PM
Extreme Electronics Sept 28 2004
Picture of the controller and a view of the primary, caps, IGBT's etc, with the secondary removed..
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:27PM
Mattrg Sept 28 2004
My best coil yet...Mini DRSSTC
Secondary stands 7in tall and is 4in in diameter with 28awg wire
Primary is wound directly over the secondary using 18awg hookup wire, 3 turns
Toroid is 10in long and 4 in diamter, Al dryer ducting
Resonate cap is .1uF3kv
Half-bridge uses a set of 40N60 miniblock IGBTs
Driver is a self resonante driver based around the MAX913 IC
Power in is via 10amp variac with its own breaker , also is voltage doubled using 2 3500uF 450volt capacitors.
System interrupted at 10ms and 18-100 BPS
Max Spark lenght so far is 25in
Tesladownunder, Sat Feb 04 2006, 05:27PM
Mattrg Sept 28 2004
My best coil yet...Mini DRSSTC
Secondary stands 7in tall and is 4in in diameter with 28awg wire
Primary is wound directly over the secondary using 18awg hookup wire, 3 turns
Toroid is 10in long and 4 in diamter, Al dryer ducting
Resonate cap is .1uF3kv
Half-bridge uses a set of 40N60 miniblock IGBTs
Driver is a self resonante driver based around the MAX913 IC
Power in is via 10amp variac with its own breaker , also is voltage doubled using 2 3500uF 450volt capacitors.
System interrupted at 10ms and 18-100 BPS
Max Spark lenght so far is 25in
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:28PM
Mattrg Sept 28 2004
Spark picture at 10ms and 18BPS
Tesladownunder, Sat Feb 04 2006, 05:28PM
Mattrg Sept 28 2004
Spark picture at 10ms and 18BPS
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:30PM
EastVoltResearch Sept 29 2004
Here is my portable 3.5kW Demonstration Coil.
At least it was until I built my DRSSTC coils. It is now
basically scrap.
Can output up to five foot arcs no problem.
Use 14.4kV/240mA Potential Transformer
Asychronous Rotary Spark Gap (ARSG) 10" Rotor
Custom Controller System
20" x 5" Toroid
Complete Details can be found here:
Tesladownunder, Sat Feb 04 2006, 05:30PM
EastVoltResearch Sept 29 2004
Here is my portable 3.5kW Demonstration Coil.
At least it was until I built my DRSSTC coils. It is now
basically scrap.
Can output up to five foot arcs no problem.
Use 14.4kV/240mA Potential Transformer
Asychronous Rotary Spark Gap (ARSG) 10" Rotor
Custom Controller System
20" x 5" Toroid
Complete Details can be found here:
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:32PM
EastVoltResearch Sept 29 2004
Here is a picture of the coil during a demonstration at the
2003 SJ Teslathon
Tesladownunder, Sat Feb 04 2006, 05:32PM
EastVoltResearch Sept 29 2004
Here is a picture of the coil during a demonstration at the
2003 SJ Teslathon
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:34PM
Adam Horden Sept 29 2004
Hi All,
Maybee some of the solid state coils that are pictured here could be added to the Solid State Tesla Coil database?
The idea was to have a way to compair diffrent topologies of Solid State Coils and draws up some graphs etc. Could even give us some idea on the best coupling for DRSSTCS etc. Compair OLTCS to DRSSTCS etc. Maybee find a streamer load modle that works to all solid state coils.
You can add a coil on that link. You need to register first but tbis takes 5 mins. You will be sent an email and to activate the account you need to click the link contained in this email.
I am even willing if you give me the info here as a post I will add it to the database.
If there are any problems with the system please let me know.
Go on add your coil
Adam
Tesladownunder, Sat Feb 04 2006, 05:34PM
Adam Horden Sept 29 2004
Hi All,
Maybee some of the solid state coils that are pictured here could be added to the Solid State Tesla Coil database?
The idea was to have a way to compair diffrent topologies of Solid State Coils and draws up some graphs etc. Could even give us some idea on the best coupling for DRSSTCS etc. Compair OLTCS to DRSSTCS etc. Maybee find a streamer load modle that works to all solid state coils.
You can add a coil on that link. You need to register first but tbis takes 5 mins. You will be sent an email and to activate the account you need to click the link contained in this email.
I am even willing if you give me the info here as a post I will add it to the database.
If there are any problems with the system please let me know.
Go on add your coil
Adam
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:41PM
Jim Mitchell Sept 29 2004
That's one of my boards I see in the background there Matt .
The World's Smallest ISSTC!
(Mod - I will resize before posting pic)
Tesladownunder, Sat Feb 04 2006, 05:41PM
Jim Mitchell Sept 29 2004
That's one of my boards I see in the background there Matt .
The World's Smallest ISSTC!
(Mod - I will resize before posting pic)
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 04 2006, 05:42PM
Tesladownunder Sept 30 2004
This is my 4 inch coil.
It uses 4 MOT's (microwave oven transformers) under oil with an angle grinder ARSG (asynchronous rotary spark gap).
Secondary is a 4 1/2 x 24 inch coil with 680 turns of 20 G (0.8 mm) enamelled wire taking up 24 inches on 4 1/2 inch PVC pipe. Coated with several coats of spray on polyurethane sealer. Measured resonant frequency is 297 kHz. Tank cap is a home made 35nF polyethylene/oil capacitor. It gives around 4 ft sparks.
I need more room in my shed (standing room only).
Peter
ps It would be great if lots of people added their coils. Everyone's are welcome even your scrappiest one. If need be I can reduce pics to 475 pixels wide if you email them to me. You will need to give them a different name if they have been used before in 4HV, otherwise your post will not send and you lose it.
Tesladownunder, Sat Feb 04 2006, 05:42PM
Tesladownunder Sept 30 2004
This is my 4 inch coil.
It uses 4 MOT's (microwave oven transformers) under oil with an angle grinder ARSG (asynchronous rotary spark gap).
Secondary is a 4 1/2 x 24 inch coil with 680 turns of 20 G (0.8 mm) enamelled wire taking up 24 inches on 4 1/2 inch PVC pipe. Coated with several coats of spray on polyurethane sealer. Measured resonant frequency is 297 kHz. Tank cap is a home made 35nF polyethylene/oil capacitor. It gives around 4 ft sparks.
I need more room in my shed (standing room only).
Peter
ps It would be great if lots of people added their coils. Everyone's are welcome even your scrappiest one. If need be I can reduce pics to 475 pixels wide if you email them to me. You will need to give them a different name if they have been used before in 4HV, otherwise your post will not send and you lose it.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 01:49AM
Scorper Oct 1 2004
Here's my SSTC, secondary is around 1400 turns on a 4" PVC former, winding lenght around 13". Driver is a PLL (=phase locked loop) and two UCC373** chips driving a GDT, and then finally a full-bridge of IRFP460 FETs and MUR860 diodes. Longest spark so far is a bit over 11" (you can actually see it in the picture!), though I'm still having slight problems with reliability.
Tesladownunder, Sun Feb 05 2006, 01:49AM
Scorper Oct 1 2004
Here's my SSTC, secondary is around 1400 turns on a 4" PVC former, winding lenght around 13". Driver is a PLL (=phase locked loop) and two UCC373** chips driving a GDT, and then finally a full-bridge of IRFP460 FETs and MUR860 diodes. Longest spark so far is a bit over 11" (you can actually see it in the picture!), though I'm still having slight problems with reliability.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 01:50AM
Vasil Oct 1 20004
Spark gap TC
600 VA potential transformer ballasted with two 250 VA HG lamp ballasts
sucker gap
20 nF @ 16 kV MMC primary cap
primary: archymedical spiral, 12 turns, average radius= 8.85", taped at turn 5
secondary: 4.33"/21.06" 749 turns
topload: two stacked toroids (28 pF)
artificial ground
spark lenght = 36 inches
More information here:
(Mod I need to resize pic before including)
Tesladownunder, Sun Feb 05 2006, 01:50AM
Vasil Oct 1 20004
Spark gap TC
600 VA potential transformer ballasted with two 250 VA HG lamp ballasts
sucker gap
20 nF @ 16 kV MMC primary cap
primary: archymedical spiral, 12 turns, average radius= 8.85", taped at turn 5
secondary: 4.33"/21.06" 749 turns
topload: two stacked toroids (28 pF)
artificial ground
spark lenght = 36 inches
More information here:
(Mod I need to resize pic before including)
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:01AM
Vasil Oct 1 2004
GU81M VTTC
GU81M high power pentode, with the grids G1 and G2 connected together, G3 to ground
2.1 kV @ 1 kVA MOT with level shifter (2.2 uF @ 6.3 kV cap)
primary: 14 cm diameter, matched impedances with the primary capacitor connected at the 34-th turn and the plate of the tube at the 48-th turn.
secondary: 7.5 cm/ 28 cm, 500 kHz
feedback coil: 21 turns, under the primary coil
no staccato used
spark lenght: 18 inches
More information here:
Tesladownunder, Sun Feb 05 2006, 02:01AM
Vasil Oct 1 2004
GU81M VTTC
GU81M high power pentode, with the grids G1 and G2 connected together, G3 to ground
2.1 kV @ 1 kVA MOT with level shifter (2.2 uF @ 6.3 kV cap)
primary: 14 cm diameter, matched impedances with the primary capacitor connected at the 34-th turn and the plate of the tube at the 48-th turn.
secondary: 7.5 cm/ 28 cm, 500 kHz
feedback coil: 21 turns, under the primary coil
no staccato used
spark lenght: 18 inches
More information here:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:05AM
Vasil Oct 1 2004
Royer SSTC
push pull, current fed, resonant converter with IGBTs (BUP314)
primary: 4+4 turns, 3.93" dia/1.18" lenght, 20.95 uF
134 nF primary cap
secondary: 14 cm dia/ 47 cm lenght with 0.125 mm wire, 3760 turns, self res = 76.2 kHz
spark lenght: 21 inches
More information here:
Tesladownunder, Sun Feb 05 2006, 02:05AM
Vasil Oct 1 2004
Royer SSTC
push pull, current fed, resonant converter with IGBTs (BUP314)
primary: 4+4 turns, 3.93" dia/1.18" lenght, 20.95 uF
134 nF primary cap
secondary: 14 cm dia/ 47 cm lenght with 0.125 mm wire, 3760 turns, self res = 76.2 kHz
spark lenght: 21 inches
More information here:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:09AM
Steve Connor Oct 1 2004
Tesla-2
3.5" x 18" secondary, metal bowl topload
Fres=about 210 kHz
13 turn conical primary
12.5nF 22kV MMC cap
12,000 rpm async rotary gap
10kV DC power supply made with single MOT+ electrolytic caps and diodes
"Multi-Mini-Charging-Choke"
Spark length 40" at 400bps, 1kW
Tesladownunder, Sun Feb 05 2006, 02:09AM
Steve Connor Oct 1 2004
Tesla-2
3.5" x 18" secondary, metal bowl topload
Fres=about 210 kHz
13 turn conical primary
12.5nF 22kV MMC cap
12,000 rpm async rotary gap
10kV DC power supply made with single MOT+ electrolytic caps and diodes
"Multi-Mini-Charging-Choke"
Spark length 40" at 400bps, 1kW
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:11AM
Steve Connor Oct 1 2004
Tesla-1
Same parts as Tesla-2, except only 9.4nF tank cap, smaller topload, static gap, and 10kV 25mA NST.
Spark length 17"
Tesladownunder, Sun Feb 05 2006, 02:11AM
Steve Connor Oct 1 2004
Tesla-1
Same parts as Tesla-2, except only 9.4nF tank cap, smaller topload, static gap, and 10kV 25mA NST.
Spark length 17"
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:13AM
Hammertone Oct 1 2004
This is the 2nd. coil that I built.
It is on permanent exhibit at the Danish Electricity Museum
Torus: 600mm by 160mm, copper
Secondary: 600turns of 1mm wire, spacewound on 250mmØ, 870mmL polyethylene tubing.
Primary: 25mm wide, 0.6mm thick bronze strip. This gets warm during operation.
Cap: Maxwell 100.000V 40nF
Sparkgap: Sync. Rotary. 300BPS Equal Bangsize configuration.
Transformer: 20kV/3000VA (continous) Homewound.
More details:
Tesladownunder, Sun Feb 05 2006, 02:13AM
Hammertone Oct 1 2004
This is the 2nd. coil that I built.
It is on permanent exhibit at the Danish Electricity Museum
Torus: 600mm by 160mm, copper
Secondary: 600turns of 1mm wire, spacewound on 250mmØ, 870mmL polyethylene tubing.
Primary: 25mm wide, 0.6mm thick bronze strip. This gets warm during operation.
Cap: Maxwell 100.000V 40nF
Sparkgap: Sync. Rotary. 300BPS Equal Bangsize configuration.
Transformer: 20kV/3000VA (continous) Homewound.
More details:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:15AM
Cesiumsponge Oct 1 2004
810 VTTC, Steve Ward clone I built last year with his help. It has been sitting around without much use. Specs are very similar.
Built as a tabletop unit, 12x12" PE base. Uses a new 810 RCA tube and a Freau 6x1.75" toroid unit and integrated breakout point. Still needs a staccato unit but I have gotten upwards of 16-17" streamers to a suspended metal rod before the plate starts getting red.
Tesladownunder, Sun Feb 05 2006, 02:15AM
Cesiumsponge Oct 1 2004
810 VTTC, Steve Ward clone I built last year with his help. It has been sitting around without much use. Specs are very similar.
Built as a tabletop unit, 12x12" PE base. Uses a new 810 RCA tube and a Freau 6x1.75" toroid unit and integrated breakout point. Still needs a staccato unit but I have gotten upwards of 16-17" streamers to a suspended metal rod before the plate starts getting red.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:17AM
JimmyH Oct 1 2004
This is my DRSSTC. 6x30" secondary, 7x36" toroid. Max spark length so far is 93".
Ummmm..... not sure what else to say..
oops, gotta fix the pic size
Tesladownunder, Sun Feb 05 2006, 02:17AM
JimmyH Oct 1 2004
This is my DRSSTC. 6x30" secondary, 7x36" toroid. Max spark length so far is 93".
Ummmm..... not sure what else to say..
oops, gotta fix the pic size
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:20AM
Steve Ward Oct 1 2004
My DRSSTC-2.
Standing at about 7' tall, this coil has produced over 11' point-to-point arcs from an estimated 4-5kVA at 100bps. It uses 700VDC input voltage to the h-bridge (consisting of 300A 1200V IGBTs). Secondary is 8"x48", tank cap is 360nF, toroids are 4.5"X : 26" and 38". More specs at my website:
The photo is by Terry Blake at the 2004 Cheesehead Teslathon (Wisconsin). Here its running with 2 breakout points with arcs reaching 9-10' to ground. You can see me hunched over the variac, Jimmy on the ground next to it, and his Dad standing just to the right of the secondary.
Tesladownunder, Sun Feb 05 2006, 02:20AM
Steve Ward Oct 1 2004
My DRSSTC-2.
Standing at about 7' tall, this coil has produced over 11' point-to-point arcs from an estimated 4-5kVA at 100bps. It uses 700VDC input voltage to the h-bridge (consisting of 300A 1200V IGBTs). Secondary is 8"x48", tank cap is 360nF, toroids are 4.5"X : 26" and 38". More specs at my website:
The photo is by Terry Blake at the 2004 Cheesehead Teslathon (Wisconsin). Here its running with 2 breakout points with arcs reaching 9-10' to ground. You can see me hunched over the variac, Jimmy on the ground next to it, and his Dad standing just to the right of the secondary.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:22AM
Steve Ward Oct 1 2004
Here is another DRSSTC (my DRSSTC-3). Its a mini coil that i built with the very original ISSTC driver. This coil uses a half-bridge at 350VDC input. It uses only 2 MMC caps for 75nf at 4kv rating. The secondary is 4.5"x11", 30awg. Topped off with a 3"x12" toroid. It makes sparks up to 27" (pictured). Currently working on longer sparks. Uses around 300W at 100bps for average 24" sparks. More details at my site of course.
Tesladownunder, Sun Feb 05 2006, 02:22AM
Steve Ward Oct 1 2004
Here is another DRSSTC (my DRSSTC-3). Its a mini coil that i built with the very original ISSTC driver. This coil uses a half-bridge at 350VDC input. It uses only 2 MMC caps for 75nf at 4kv rating. The secondary is 4.5"x11", 30awg. Topped off with a 3"x12" toroid. It makes sparks up to 27" (pictured). Currently working on longer sparks. Uses around 300W at 100bps for average 24" sparks. More details at my site of course.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:23AM
EastVoltResearch Oct 1 2004
Here are some pictures of my DRSSTC 1 system.
6.5" Secondary, 20" x 5" Toroid, 0.11uF Primary Capacitor
Resonant Frequency 100Hz
Maximum Arc Length with this system is 80"
Full Details can be here:
Full Electrical / Mechanical Design / Testing / Details along with DRSSTC II are documented in a 150+ page book I wrote which is available here:
DRSSTC II
"A Modern Day Solid State Tesla Coil Experiment"
Tesladownunder, Sun Feb 05 2006, 02:23AM
EastVoltResearch Oct 1 2004
Here are some pictures of my DRSSTC 1 system.
6.5" Secondary, 20" x 5" Toroid, 0.11uF Primary Capacitor
Resonant Frequency 100Hz
Maximum Arc Length with this system is 80"
Full Details can be here:
Full Electrical / Mechanical Design / Testing / Details along with DRSSTC II are documented in a 150+ page book I wrote which is available here:
DRSSTC II
"A Modern Day Solid State Tesla Coil Experiment"
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:25AM
EastVoltResearch Oct 1 2004
Attachment 2: DRSSTC 1 Arc Picture
Tesladownunder, Sun Feb 05 2006, 02:25AM
EastVoltResearch Oct 1 2004
Attachment 2: DRSSTC 1 Arc Picture
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 05 2006, 02:27AM
Vasil Oct 1 2004
Ignition coils powred tesla coil
PSU: dual ignition coil system with secondaries in serie driven by a 1000 watts dimmer and 6 uF cap
primary: archymedical spiral, 14 turns, tap at 12 turns
primary cap: 1.33 nF @ 10 kV
secondary: 1.6" / 8", 800 turns
topload: 2.2" diameter light bulb covered in alu foil
sparks: 3-4 inches
More information here:
Tesladownunder, Sun Feb 05 2006, 02:27AM
Vasil Oct 1 2004
Ignition coils powred tesla coil
PSU: dual ignition coil system with secondaries in serie driven by a 1000 watts dimmer and 6 uF cap
primary: archymedical spiral, 14 turns, tap at 12 turns
primary cap: 1.33 nF @ 10 kV
secondary: 1.6" / 8", 800 turns
topload: 2.2" diameter light bulb covered in alu foil
sparks: 3-4 inches
More information here:
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:34PM
Vasil Oct 1 2004
the same
Tesladownunder, Tue Feb 07 2006, 04:34PM
Vasil Oct 1 2004
the same
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:38PM
Vasil Oct 2 2004
Mini ISSTC setup
- antenna feedback driver (74HC14>>UCCs>>gdt), with noise generator with 555 and 555 staccato interrupter (the same as described on Steve Ward site).
-IRFP260 half bridge, 470 uF@400 V DC cap, 120 vac full rectifyed input
-secondary: 11 cm / 30 cm, 400 kHz
-primary: 3 turns wound directly on the bottom of the secondary
-sparks: 8 inches
More information here:
Tesladownunder, Tue Feb 07 2006, 04:38PM
Vasil Oct 2 2004
Mini ISSTC setup
- antenna feedback driver (74HC14>>UCCs>>gdt), with noise generator with 555 and 555 staccato interrupter (the same as described on Steve Ward site).
-IRFP260 half bridge, 470 uF@400 V DC cap, 120 vac full rectifyed input
-secondary: 11 cm / 30 cm, 400 kHz
-primary: 3 turns wound directly on the bottom of the secondary
-sparks: 8 inches
More information here:
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:40PM
Vasil Oct 2 2004
EL509 VTTC
-El 509 pentode from the TV final stage
-primary: 4.33"/7.48", 22 turns, taped at 18 turns
-feedback coil: 19 turns above the primary
-secondary: 2"/18.89", 2500 turns
-sparks: 7-8 inches
More information here:
Tesladownunder, Tue Feb 07 2006, 04:40PM
Vasil Oct 2 2004
EL509 VTTC
-El 509 pentode from the TV final stage
-primary: 4.33"/7.48", 22 turns, taped at 18 turns
-feedback coil: 19 turns above the primary
-secondary: 2"/18.89", 2500 turns
-sparks: 7-8 inches
More information here:
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:41PM
Vasil Oct 2 2004
miniDRSSTC
-phase locked loop driver, antenna feedback, non pulsed (developped by Steve Conner)
-IRFP260N half bridge, 120 vac half rectifyed
-primary: 10 turns on a 17 cm diameter flower pot
-primary cap: 15 nF @ 4kV ceramic
-secondary: 11 cm/28 cm, 966 turns
-topload: 3.4"/10.8" toroid
-sparks: 10 inches
More information here:
Tesladownunder, Tue Feb 07 2006, 04:41PM
Vasil Oct 2 2004
miniDRSSTC
-phase locked loop driver, antenna feedback, non pulsed (developped by Steve Conner)
-IRFP260N half bridge, 120 vac half rectifyed
-primary: 10 turns on a 17 cm diameter flower pot
-primary cap: 15 nF @ 4kV ceramic
-secondary: 11 cm/28 cm, 966 turns
-topload: 3.4"/10.8" toroid
-sparks: 10 inches
More information here:
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:42PM
Vasil Oct 2 2004
Spark gap tesla coil
PSU: 600 VA potential transformer ballasted with two 1 kW waterheaters in parallel.
no safety gap, no filters
secondary: 3"/9.6", 960 turns, 18.93 mH, 4.014 pF
toroid: 3.4"/10.8", 11.77 pF
res freq: 322 kHz
primary: flat primary, 14 turns, taped at 10 turns, 15.16 uH
primary cap: glass window covered with alu foil, for a total capacitance =16 nF: now I am using a 20 nF @ 16 kV MMC
sucker gap
sparks: 2 feet
More information here:
Tesladownunder, Tue Feb 07 2006, 04:42PM
Vasil Oct 2 2004
Spark gap tesla coil
PSU: 600 VA potential transformer ballasted with two 1 kW waterheaters in parallel.
no safety gap, no filters
secondary: 3"/9.6", 960 turns, 18.93 mH, 4.014 pF
toroid: 3.4"/10.8", 11.77 pF
res freq: 322 kHz
primary: flat primary, 14 turns, taped at 10 turns, 15.16 uH
primary cap: glass window covered with alu foil, for a total capacitance =16 nF: now I am using a 20 nF @ 16 kV MMC
sucker gap
sparks: 2 feet
More information here:
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:42PM
Dan Strother Oct 2 2004This is my latest, and nicest construct yet. I have deemed it Elysium, since the project just 'came together' and yielded the results I wanted with little fiddling. It's key features include:
Half-bridge of FGH50N6S2D IGBTs
CD4046 based PLL driver electronics (developed by Steve Conner) – this thing is basically immune to upset; I have been able to short the toroid directly to ground with no ill effects.
Adjustable staccato controller – Reduces power consumption and system heating for prolonged runs
No variac required, thanks to the reliability of the PLL and mains-synced turn-on afforded by the staccato controller
Remote dead-man switch operation
Sleek acrylic case
Additional information can be found on my website.
Elysium
Tesladownunder, Tue Feb 07 2006, 04:42PM
Dan Strother Oct 2 2004This is my latest, and nicest construct yet. I have deemed it Elysium, since the project just 'came together' and yielded the results I wanted with little fiddling. It's key features include:
Half-bridge of FGH50N6S2D IGBTs
CD4046 based PLL driver electronics (developed by Steve Conner) – this thing is basically immune to upset; I have been able to short the toroid directly to ground with no ill effects.
Adjustable staccato controller – Reduces power consumption and system heating for prolonged runs
No variac required, thanks to the reliability of the PLL and mains-synced turn-on afforded by the staccato controller
Remote dead-man switch operation
Sleek acrylic case
Additional information can be found on my website.
Elysium
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:46PM
Teslacoiler Oct 2 2004
Hi All!
This is my best VTTC.
was born with some pieces of my first VTTC (the first with autotransformer primary) for the occasion of first italian teslathon.
SPECS:
Primary: 52 turns of 2,5 sq-mm cable with PVC insulation wound on 16cm
diameter PVC tube, one tap every turn.
Secondary: 2230 turns of 0.224mm magnet wire wound on 8.2x50cm PVC tube
Feedback: 24 turns of 1 sq-mm, PVC insulated cable wound under the primary
Tank cap: 6.75nF 21kV MMC with 100 MKP-HQ capacitors in series-parallel.
Power supply: 1,1kVA MOT + level shifter + variac
total power: 1520W true power ( measured by double coil wattmeter, filament
power included )
sparklengt: 1-40cm, adjustable
note: fully adjustable via autotransformer primary for maximum voltage
or current in every load conditions
the official schematic is available here
More pics available on
Enjoy!
Ciao!
Fabio.
Tesladownunder, Tue Feb 07 2006, 04:46PM
Teslacoiler Oct 2 2004
Hi All!
This is my best VTTC.
was born with some pieces of my first VTTC (the first with autotransformer primary) for the occasion of first italian teslathon.
SPECS:
Primary: 52 turns of 2,5 sq-mm cable with PVC insulation wound on 16cm
diameter PVC tube, one tap every turn.
Secondary: 2230 turns of 0.224mm magnet wire wound on 8.2x50cm PVC tube
Feedback: 24 turns of 1 sq-mm, PVC insulated cable wound under the primary
Tank cap: 6.75nF 21kV MMC with 100 MKP-HQ capacitors in series-parallel.
Power supply: 1,1kVA MOT + level shifter + variac
total power: 1520W true power ( measured by double coil wattmeter, filament
power included )
sparklengt: 1-40cm, adjustable
note: fully adjustable via autotransformer primary for maximum voltage
or current in every load conditions
the official schematic is available here
More pics available on
Enjoy!
Ciao!
Fabio.
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:48PM
teslacoiler Oct 2 2004
Yet another pic of my VTTCBIG2°
...... i love glowing plates!
Enjoy!
Ciao!
Fabio.
Tesladownunder, Tue Feb 07 2006, 04:48PM
teslacoiler Oct 2 2004
Yet another pic of my VTTCBIG2°
...... i love glowing plates!
Enjoy!
Ciao!
Fabio.
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:50PM
Idreamz Oct 2 2004
Here is the first coil I built. Constructed it around November 2003, with midifications and tweaks in August 2004. Here are the specifications as of now:
Power Supply: 6kV 30mA Neon Sign Transformer
Capacitor Bank: MMC, 12kV at 0.017625uF (17.6nF)
Primary: 8.5 Turns, 15degree inverse conical, tapped at turn 5
Secondary: 40mm dia PVC, 1100 turns 0.2mm wire, 4 coats polyurethane
Spark Gap: 3 Gaps, Copper pipe gap, ajustable with brass bolt, Quenched with a fan from a microwave oven.
Protection: Aluminium Safety gaps, EMI fiter.
Ground: 22mm x 1' Copper pipe, but as of now, i am connecting the bottom turn of the secondary to the first turn of the primary. Still works without a ground.
Max arc length as of now, 25cm with 180W input.
Below is a photo of the coil in a nice stand. (The photo is a bit outdated, and shows 2 toroids, but I found it to work better with 1, and the pri is now tapped at turn 5.)
I plan to do more work on improving it if i have the time.
For much more information including comprehensive construction details, visit .
Tesladownunder, Tue Feb 07 2006, 04:50PM
Idreamz Oct 2 2004
Here is the first coil I built. Constructed it around November 2003, with midifications and tweaks in August 2004. Here are the specifications as of now:
Power Supply: 6kV 30mA Neon Sign Transformer
Capacitor Bank: MMC, 12kV at 0.017625uF (17.6nF)
Primary: 8.5 Turns, 15degree inverse conical, tapped at turn 5
Secondary: 40mm dia PVC, 1100 turns 0.2mm wire, 4 coats polyurethane
Spark Gap: 3 Gaps, Copper pipe gap, ajustable with brass bolt, Quenched with a fan from a microwave oven.
Protection: Aluminium Safety gaps, EMI fiter.
Ground: 22mm x 1' Copper pipe, but as of now, i am connecting the bottom turn of the secondary to the first turn of the primary. Still works without a ground.
Max arc length as of now, 25cm with 180W input.
Below is a photo of the coil in a nice stand. (The photo is a bit outdated, and shows 2 toroids, but I found it to work better with 1, and the pri is now tapped at turn 5.)
I plan to do more work on improving it if i have the time.
For much more information including comprehensive construction details, visit
.Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:52PM
EastVoltResearch Oct 3 2004
Here is my Dual 833A VTTC Coil (ala John Freau's design) outputting 28" arcs in this particular photo. Maximum arc length was almost 32".
Dual 833A Tubes
Using the Dan McCauley VTTC Stacatto Controller System
MOT Transformer
Dan's Dual 833A VTTC Design - Complete Details, Schematics, Photos, Description, Parts List
Dan's Custom VTTC Stacatto Controller - Complete Details, Schematics, Photos, Description
Tesladownunder, Tue Feb 07 2006, 04:52PM
EastVoltResearch Oct 3 2004
Here is my Dual 833A VTTC Coil (ala John Freau's design) outputting 28" arcs in this particular photo. Maximum arc length was almost 32".
Dual 833A Tubes
Using the Dan McCauley VTTC Stacatto Controller System
MOT Transformer
Dan's Dual 833A VTTC Design - Complete Details, Schematics, Photos, Description, Parts List
Dan's Custom VTTC Stacatto Controller - Complete Details, Schematics, Photos, Description
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:55PM
EastVoltResearch Oct 3 2004
Attachment 3: Dan's VTTC Custom Stacatto Controller
Tesladownunder, Tue Feb 07 2006, 04:55PM
EastVoltResearch Oct 3 2004
Attachment 3: Dan's VTTC Custom Stacatto Controller
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Feb 07 2006, 04:57PM
Tesladownunder Oct 3 2004
First light sparks here are from a hasty lash up. The primary is thin 19G wire taped onto a flattened cardboard box on a wooden pallet. The topload is a small toroid with a sphere, with a breakout point, sitting on top. The coupling was all wrong, the tuning very brief (11 turns) and everything was wet with dew. My ARSG gap was not optimised. The current draw was over 20 A, 250V (5KVA). Still the 5 foot sparks were gratifying and limited by the proximity to the basketball ring. Neither the Tesla coil or basketball ring were easily moved to get a peak spark length. The spherical electrode makes this look like a scaled down Electrum.
The former is made of 3 mm (0.12 inch) polypropylene sheet welded around end caps and one centre cap. This is light (weighs 9 Kg, 20 lbs) and the polypropylene is a suitable plastic in regard to dielectric losses. It measures 45 x 150 cm (18 by 59 inches).
Secondary coil 1100 turns of 0.9 mm(19 AWG 0.037 inch) wire on 45 x 137 cm (18 x 54 inches) elevated 15 cm (6 inches). This uses 11 kg (24 lbs) of C 220 (220 deg C) polyimide coated enameled wire.
If you look closely you can see Mars above the coil. Further details and progress on my site.
Peter
Tesladownunder, Tue Feb 07 2006, 04:57PM
Tesladownunder Oct 3 2004
First light sparks here are from a hasty lash up. The primary is thin 19G wire taped onto a flattened cardboard box on a wooden pallet. The topload is a small toroid with a sphere, with a breakout point, sitting on top. The coupling was all wrong, the tuning very brief (11 turns) and everything was wet with dew. My ARSG gap was not optimised. The current draw was over 20 A, 250V (5KVA). Still the 5 foot sparks were gratifying and limited by the proximity to the basketball ring. Neither the Tesla coil or basketball ring were easily moved to get a peak spark length. The spherical electrode makes this look like a scaled down Electrum.
The former is made of 3 mm (0.12 inch) polypropylene sheet welded around end caps and one centre cap. This is light (weighs 9 Kg, 20 lbs) and the polypropylene is a suitable plastic in regard to dielectric losses. It measures 45 x 150 cm (18 by 59 inches).
Secondary coil 1100 turns of 0.9 mm(19 AWG 0.037 inch) wire on 45 x 137 cm (18 x 54 inches) elevated 15 cm (6 inches). This uses 11 kg (24 lbs) of C 220 (220 deg C) polyimide coated enameled wire.
If you look closely you can see Mars above the coil. Further details and progress on my site.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:15AM
Tesla coiler Oct 3 2004
Hi All!
This is my TESLA2° a simple and cheap ( but really powerful )
medium-sized standard spark gap coil
SPECS:
Primary: 11.5 turns of 10mm diameter, 20mm spaced copper tube
(20 meters) wound on four machined teflon supports.
Secondary: 1950 turns of 0.4mm magnet wire wound on 16x75cm PVC tube
Toroid: 12 cm tube, 69 cm overall diameter,roughly calculated than
fine adjusted for measured quarter wawe resonance.
Tank cap: 50nF-24kVdc MMC with 180 1uF-400Vdc MKP-HQ capacitors in
series-parallel. ( 60 pieces in series per string,
3 string in parallel )
Spark gap: 10 pieces (9 gaps) of 16x200mm copper tubes, spaced about
0.9mm, no fans required.
Power supply: only 7kV 100mA + variac
sparklengt: 1.2 meters streamers, 1.4meters sparks to grounded tip
note: designed for LTR static-gap operation at 50Hz power grid,
100Bps, see schematics for safety gaps and RFI filters
More pics available on
Enjoy!
Ciao!
Fabio.
Tesladownunder, Sun Feb 12 2006, 01:15AM
Tesla coiler Oct 3 2004
Hi All!
This is my TESLA2° a simple and cheap ( but really powerful )
medium-sized standard spark gap coil
SPECS:
Primary: 11.5 turns of 10mm diameter, 20mm spaced copper tube
(20 meters) wound on four machined teflon supports.
Secondary: 1950 turns of 0.4mm magnet wire wound on 16x75cm PVC tube
Toroid: 12 cm tube, 69 cm overall diameter,roughly calculated than
fine adjusted for measured quarter wawe resonance.
Tank cap: 50nF-24kVdc MMC with 180 1uF-400Vdc MKP-HQ capacitors in
series-parallel. ( 60 pieces in series per string,
3 string in parallel )
Spark gap: 10 pieces (9 gaps) of 16x200mm copper tubes, spaced about
0.9mm, no fans required.
Power supply: only 7kV 100mA + variac
sparklengt: 1.2 meters streamers, 1.4meters sparks to grounded tip
note: designed for LTR static-gap operation at 50Hz power grid,
100Bps, see schematics for safety gaps and RFI filters
More pics available on
Enjoy!
Ciao!
Fabio.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:16AM
Teslacoiler Oct 3 2004
An old-style B/W artistic pic of me and my TESLA2° at Vimercate 2004 teslathon.
Remember, this is a MEDIUM SIZED coil!
Tesladownunder, Sun Feb 12 2006, 01:16AM
Teslacoiler Oct 3 2004
An old-style B/W artistic pic of me and my TESLA2° at Vimercate 2004 teslathon.
Remember, this is a MEDIUM SIZED coil!
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:20AM
Colin Heath Oct 3 2004
hi all,
this is my drsstc.
specs half bridge of hgt1n40n60 igbts with 100nF tank cap. 6" secondary at 120KHz.
ouput length 26" maxed out.
cheers
colin
Tesladownunder, Sun Feb 12 2006, 01:20AM
Colin Heath Oct 3 2004
hi all,
this is my drsstc.
specs half bridge of hgt1n40n60 igbts with 100nF tank cap. 6" secondary at 120KHz.
ouput length 26" maxed out.
cheers
colin
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:27AM
Evolve000 Oct 3 2004
This is White Lightning, the Tesla coil my group and I contructed for our Senior Design Project at Louisiana Tech University. The vital stats on this coil are:
1 ) 13.35 nF tank capacitor.
2 ) 50 mH and 7.92 pF secondary coil.
3 ) Secondary form with 4.25†diameter, 20†height, and 1609 turns.
4 ) Top load: major diameter 15â€, minor diameter 4â€, and total capacitance of 16.648 pF.
5 ) Primary coil made of ¼†copper tubing will have an inductance of 0.094 mH.
6 ) Resonant frequency of 140 kHz.
7 ) 15 kV 30 mA neon sign transformer as power supply (450 VA).
8 ) Maximum spark length of about 36 inches.
For more information, check out my website at
Tesladownunder, Sun Feb 12 2006, 01:27AM
Evolve000 Oct 3 2004
This is White Lightning, the Tesla coil my group and I contructed for our Senior Design Project at Louisiana Tech University. The vital stats on this coil are:
1 ) 13.35 nF tank capacitor.
2 ) 50 mH and 7.92 pF secondary coil.
3 ) Secondary form with 4.25†diameter, 20†height, and 1609 turns.
4 ) Top load: major diameter 15â€, minor diameter 4â€, and total capacitance of 16.648 pF.
5 ) Primary coil made of ¼†copper tubing will have an inductance of 0.094 mH.
6 ) Resonant frequency of 140 kHz.
7 ) 15 kV 30 mA neon sign transformer as power supply (450 VA).
8 ) Maximum spark length of about 36 inches.
For more information, check out my website at
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:46AM
Kalenedrael Oct 3 2004
My Tesla coil on my website, and a (old) spark image:
I also have a mini twin: (pic corrupted but avail here)
And a SSTC:
Tesladownunder, Sun Feb 12 2006, 01:46AM
Kalenedrael Oct 3 2004
My Tesla coil on my website, and a (old) spark image:
I also have a mini twin: (pic corrupted but avail here)
And a SSTC:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:47AM
EastVoltResearch Oct 4 2004
Dan's DRSSTC II System
26" x 6" Toroid
6.5" Secondary
0.11uF Primary Tank Capacitor
Maximum Arc Length (approx. 72")
Complete Details of this coil can be found here:
Here I am doing some final adjustments before a demonstration at the RATCB 2004 teslathon.
Tesladownunder, Sun Feb 12 2006, 01:47AM
EastVoltResearch Oct 4 2004
Dan's DRSSTC II System
26" x 6" Toroid
6.5" Secondary
0.11uF Primary Tank Capacitor
Maximum Arc Length (approx. 72")
Complete Details of this coil can be found here:
Here I am doing some final adjustments before a demonstration at the RATCB 2004 teslathon.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:49AM
EastVoltResearch Oct 4 2004
Attachment 2 :
Spark photos of DRSSTC II.
Tesladownunder, Sun Feb 12 2006, 01:49AM
EastVoltResearch Oct 4 2004
Attachment 2 :
Spark photos of DRSSTC II.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:51AM
hilo90mhz Oct 5 2004
900W Tesla Coil
Secondary: 6" x 24" wound with 24guage
Primary: 18turn with 1/4" solid copper ground wire
Transformer: 15KV 60MA NST
Capacitor: .02uf 36KV MMC
Sparkgap: Vacuum quenched single gap
Toroid: 6" plastic ducting coverd with aluminum foil strips, 24" outside diameter
36" max spark length
Worked great until recently when my MMC rack fell apart and half the series string shorted..
Website with more info:
Tesladownunder, Sun Feb 12 2006, 01:51AM
hilo90mhz Oct 5 2004
900W Tesla Coil
Secondary: 6" x 24" wound with 24guage
Primary: 18turn with 1/4" solid copper ground wire
Transformer: 15KV 60MA NST
Capacitor: .02uf 36KV MMC
Sparkgap: Vacuum quenched single gap
Toroid: 6" plastic ducting coverd with aluminum foil strips, 24" outside diameter
36" max spark length
Worked great until recently when my MMC rack fell apart and half the series string shorted..
Website with more info:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:54AM
hilo90mhz Oct 5 2004
SSTC-1
Old school SSTC built back when Alan Sharp and Richie Burnett were the main resources for info on SSTCs.
Secondary: 3" by 13" wound with 28awg
Primary: 16 turns 10awg stranded copper wire
Toroid: 2" by 7" made from vacuum cleaner tubing covered with alum foil
Mosfets: FDH44N50
Resonsant Freq = 333khz
8" sparks at 120v
Uses the standard tl494 driver circuit in open loop. Has a switch for full or half wave rectification, and will run off 120v or 240v
Website with more info:
Tesladownunder, Sun Feb 12 2006, 01:54AM
hilo90mhz Oct 5 2004
SSTC-1
Old school SSTC built back when Alan Sharp and Richie Burnett were the main resources for info on SSTCs.
Secondary: 3" by 13" wound with 28awg
Primary: 16 turns 10awg stranded copper wire
Toroid: 2" by 7" made from vacuum cleaner tubing covered with alum foil
Mosfets: FDH44N50
Resonsant Freq = 333khz
8" sparks at 120v
Uses the standard tl494 driver circuit in open loop. Has a switch for full or half wave rectification, and will run off 120v or 240v
Website with more info:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 01:57AM
Tesladownunder Oct 5 2004
This is my best shot with 8 foot sparks. The spark is 3 times the length of the secondary winding it came from (96 vs 32 inches). I still have not seen a longer ratio clearly measurable from a photo. This photo won a (minor) prize in a competition and looks dramatic in high resolution.
Coil is 6 inches diam, cap is 90nF (MMC plus home rolled), supply is 4 MOT's and gap is an angle grinder ARSG running a very fast 1200 bps (9000rpm, 8 electrodes). Power is about 5kVA and cooling of the gap is with a leaf blower.
The sign on the gate says "Forget the dog, beware of the owner"
Lots more info on my site with several Tesla coils plus laser, railgun, high voltage, can crushing, magnetic levitation and electronic projects.
Peter
ps We need more beginners coils here. I've used all mine.
Tesladownunder, Sun Feb 12 2006, 01:57AM
Tesladownunder Oct 5 2004
This is my best shot with 8 foot sparks. The spark is 3 times the length of the secondary winding it came from (96 vs 32 inches). I still have not seen a longer ratio clearly measurable from a photo. This photo won a (minor) prize in a competition and looks dramatic in high resolution.
Coil is 6 inches diam, cap is 90nF (MMC plus home rolled), supply is 4 MOT's and gap is an angle grinder ARSG running a very fast 1200 bps (9000rpm, 8 electrodes). Power is about 5kVA and cooling of the gap is with a leaf blower.
The sign on the gate says "Forget the dog, beware of the owner"
Lots more info on my site with several Tesla coils plus laser, railgun, high voltage, can crushing, magnetic levitation and electronic projects.
Peter
ps We need more beginners coils here. I've used all mine.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 02:01AM
Lucasmtong Oct 5 2004
Primary / Tank
7.5Kv 30mA NST
12.5nF MMC 8 .1uF 1500v in series with 10M bleed resistors on each cap
12 turn primary with 8AWG insulated wire (flat pancake)
Secondary
Diameter 10cm
Winding Height 42cm
Wire diameter .4mm
Turns aprox. 1050
1/4 wave res frequency 247Khz (with topload)
Topload
2 staked salad dishes + home make toiroid
Aprox. 47pF
Tesladownunder, Sun Feb 12 2006, 02:01AM
Lucasmtong Oct 5 2004
Primary / Tank
7.5Kv 30mA NST
12.5nF MMC 8 .1uF 1500v in series with 10M bleed resistors on each cap
12 turn primary with 8AWG insulated wire (flat pancake)
Secondary
Diameter 10cm
Winding Height 42cm
Wire diameter .4mm
Turns aprox. 1050
1/4 wave res frequency 247Khz (with topload)
Topload
2 staked salad dishes + home make toiroid
Aprox. 47pF
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 02:02AM
Lucasmtong Oct 15 2004
40cm Sparks
Point to Point Breakout
Tesladownunder, Sun Feb 12 2006, 02:02AM
Lucasmtong Oct 15 2004
40cm Sparks
Point to Point Breakout
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 02:04AM
Dave 47 Oct 29 2004
YeeHaa!!! My first coil!
9KV 30mA NST
15nF cap (10 x 0.15uF @ 2KV)
Spark gap = 4 gap RQ type with no forced air (yet)
Primary ~8.5 turns (tuned 15 turns wound)
Secondary = 4.38inches by 22.5inches 22AWG (800 turns)
Max arc length so far = 20inches
The picture is only about 12inches.
Tesladownunder, Sun Feb 12 2006, 02:04AM
Dave 47 Oct 29 2004
YeeHaa!!! My first coil!
9KV 30mA NST
15nF cap (10 x 0.15uF @ 2KV)
Spark gap = 4 gap RQ type with no forced air (yet)
Primary ~8.5 turns (tuned 15 turns wound)
Secondary = 4.38inches by 22.5inches 22AWG (800 turns)
Max arc length so far = 20inches
The picture is only about 12inches.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 02:06AM
DBH Oct 29 2004
Here's my mini SGTC.
Specs
Primary Input: NST - 3.6kV 30mA
Primary: 12 Turns of 8 gauge insulated wire, flat spiral.
Spark Gap: 2 copper 'T' connectors.
Secondary: 48mm diameter, wound with 0.2mm wire for 230mm. Polyurethane sealed.
Tank Cap: Six strings five 0.022uF 1500v polypropylene caps. Total rating: 0.0265uF 7500v
Safety Gap: 2 gaps and a grounded centre terminal. Brass construction.
Toroid: 220mm diameter stainless steel sphere.
Spark length with stainless steel toroid: 8 inches.
Tesladownunder, Sun Feb 12 2006, 02:06AM
DBH Oct 29 2004
Here's my mini SGTC.
Specs
Primary Input: NST - 3.6kV 30mA
Primary: 12 Turns of 8 gauge insulated wire, flat spiral.
Spark Gap: 2 copper 'T' connectors.
Secondary: 48mm diameter, wound with 0.2mm wire for 230mm. Polyurethane sealed.
Tank Cap: Six strings five 0.022uF 1500v polypropylene caps. Total rating: 0.0265uF 7500v
Safety Gap: 2 gaps and a grounded centre terminal. Brass construction.
Toroid: 220mm diameter stainless steel sphere.
Spark length with stainless steel toroid: 8 inches.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 02:46AM
Alexey Oct 31 2004
Furniture burner coil from Russia ^_^
I reanimated my first(and only) junk coil, which I've built in high school several years ago.
It's always targets my sofa instead of ground rod
Sparks up to 110cm (44 inch)
Specs:
Secondary: 9cm diameter, 1300 turns 0.33mm wire, winding length - 42cm. Polyurethane coated.
Toroid: 44 cm X 12cm diameter air duct --> 160kHz
Primary Input: 4 unshunted MOTs, big inductive ballast
Primary: 7 Turns, flat coil
Tank Cap: MMC = 0,1mk 24kVdc
Spark Gap: 200bps, async
ferrite core RF filter 0.08gn
no safety gaps
Tesladownunder, Sun Feb 12 2006, 02:46AM
Alexey Oct 31 2004
Furniture burner coil from Russia ^_^
I reanimated my first(and only) junk coil, which I've built in high school several years ago.
It's always targets my sofa instead of ground rod
Sparks up to 110cm (44 inch)
Specs:
Secondary: 9cm diameter, 1300 turns 0.33mm wire, winding length - 42cm. Polyurethane coated.
Toroid: 44 cm X 12cm diameter air duct --> 160kHz
Primary Input: 4 unshunted MOTs, big inductive ballast
Primary: 7 Turns, flat coil
Tank Cap: MMC = 0,1mk 24kVdc
Spark Gap: 200bps, async
ferrite core RF filter 0.08gn
no safety gaps
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 12 2006, 06:43PM
Alexey Nov 01 2004
sparks are well-seen even with lights turned on
Tesladownunder, Sun Feb 12 2006, 06:43PM
Alexey Nov 01 2004
sparks are well-seen even with lights turned on
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 10:55PM
Lucas Nov 1 2004
Haloween coil
secondary: 4.5 inch dia, 20 inch tall
primary: .25 inch copper pipe
tank capacitor: 38 nF bottle caps
power supply: selfmade pig running at about 1800 watts(11kV)
sparkgap: mutiple static gap
max length around 48 inches(measured)
*note the arcs were reatching past teh point of measurement but they didnt land so we could'nt measure*
Tesladownunder, Sat Feb 18 2006, 10:55PM
Lucas Nov 1 2004
Haloween coil
secondary: 4.5 inch dia, 20 inch tall
primary: .25 inch copper pipe
tank capacitor: 38 nF bottle caps
power supply: selfmade pig running at about 1800 watts(11kV)
sparkgap: mutiple static gap
max length around 48 inches(measured)
*note the arcs were reatching past teh point of measurement but they didnt land so we could'nt measure*
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 10:57PM
Lucas Nov 1 2004
another shot, this one makes the coil look rather menacing
Tesladownunder, Sat Feb 18 2006, 10:57PM
Lucas Nov 1 2004
another shot, this one makes the coil look rather menacing
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 10:59PM
Ultimax Nov 2 2004
Here's my first coil. TO be honest, I didn't really know what I was doing half the time but hey, it fired up right away without a hitch! Still works reliably. Although it's a 15kV 30mA NST coil, I doubt it's very efficient. But as a first coil, I'm pretty satisfied.
Tesladownunder, Sat Feb 18 2006, 10:59PM
Ultimax Nov 2 2004
Here's my first coil. TO be honest, I didn't really know what I was doing half the time but hey, it fired up right away without a hitch! Still works reliably. Although it's a 15kV 30mA NST coil, I doubt it's very efficient. But as a first coil, I'm pretty satisfied.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:01PM
Tesladownunder Nov 2 2004
This is my 6 inch coil and upgrades to a museum coil originally made by Stan Deyo about 20 years ago. It runs on a 5kVA pole pig with an ARSG in a faraday cage and gets used most days. Very neat construction by Stan.
My changes were to:
1 Replace the secondary with 6 x 32 inches with 1280 turns (previously 6 x 30 with 400 turns).
2 Replace the primary (previously 3 turns) now tapped at 8 of the 13 turns. A double layer primary was made due to the space constraints.
3 Use a larger topload of a 12 x 29 inch toroid with a smaller 8 x 20 toroid beneath it.
4 Add my Cornell Dubilier MMC capacitor of 45 nF to the existing long-lived mylar capacitor (total 89 nF).
5 Run the motor from 200v DC (previously 180 V).
6 Fit low profile strike rails.
7 Use an inductive ballast (below) instead of the resistive one.
Shown here with the old mylar caps, ARSG and the new primary/secondary.
Peter
Tesladownunder, Sat Feb 18 2006, 11:01PM
Tesladownunder Nov 2 2004
This is my 6 inch coil and upgrades to a museum coil originally made by Stan Deyo about 20 years ago. It runs on a 5kVA pole pig with an ARSG in a faraday cage and gets used most days. Very neat construction by Stan.
My changes were to:
1 Replace the secondary with 6 x 32 inches with 1280 turns (previously 6 x 30 with 400 turns).
2 Replace the primary (previously 3 turns) now tapped at 8 of the 13 turns. A double layer primary was made due to the space constraints.
3 Use a larger topload of a 12 x 29 inch toroid with a smaller 8 x 20 toroid beneath it.
4 Add my Cornell Dubilier MMC capacitor of 45 nF to the existing long-lived mylar capacitor (total 89 nF).
5 Run the motor from 200v DC (previously 180 V).
6 Fit low profile strike rails.
7 Use an inductive ballast (below) instead of the resistive one.
Shown here with the old mylar caps, ARSG and the new primary/secondary.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:03PM
Tesladownunder Nov 2 2004
... and it works - with about double the spark length. Shown inside the Faraday cage.
Peter
Tesladownunder, Sat Feb 18 2006, 11:03PM
Tesladownunder Nov 2 2004
... and it works - with about double the spark length. Shown inside the Faraday cage.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:05PM
Cree Nov 6 2004
ive made a pretty small table top coil though i have no pictures of it here are the details:
primary: 7.5kv-30ma NST, 0.008uf mmc, 1/2" variable gap drilled into cardboard tape roll
primary coil: 3t multi-strand wire (awg10) from a computer extention cord flat pancake
secondary: 800t awg36 enameled copper 1"wide x 4.5"tall
topload: 2"iron toroid
results: 4.8"arcs and 2.5" streamers
ill add pictues when i finally get a digi cam pictures finally here
.....................cree
Tesladownunder, Sat Feb 18 2006, 11:05PM
Cree Nov 6 2004
ive made a pretty small table top coil though i have no pictures of it here are the details:
primary: 7.5kv-30ma NST, 0.008uf mmc, 1/2" variable gap drilled into cardboard tape roll
primary coil: 3t multi-strand wire (awg10) from a computer extention cord flat pancake
secondary: 800t awg36 enameled copper 1"wide x 4.5"tall
topload: 2"iron toroid
results: 4.8"arcs and 2.5" streamers
ill add pictues when i finally get a digi cam pictures finally here
.....................cree
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:08PM
DBH Nov 8 2004
I ran my mini TC again tonight, and attempted to take a picture of it running, except my digital camera really didnt like it. I managed to get one decent pic (seen below) but not of it reaching the longest streamer length it had reached tonight. The record it set tonight was just over 10 inches. In the pic they are about 9 inches. (The TC is running on 108 watts)
Duncan
Tesladownunder, Sat Feb 18 2006, 11:08PM
DBH Nov 8 2004
I ran my mini TC again tonight, and attempted to take a picture of it running, except my digital camera really didnt like it. I managed to get one decent pic (seen below) but not of it reaching the longest streamer length it had reached tonight. The record it set tonight was just over 10 inches. In the pic they are about 9 inches. (The TC is running on 108 watts)
Duncan
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:10PM
Pvt. Sparky Nov 13 2004
First; here is my pride and joy. This coil uses an oil filled secondary. A full sized spec. poster can be seen at:
The history and construction is at:
Tesladownunder, Sat Feb 18 2006, 11:10PM
Pvt. Sparky Nov 13 2004
First; here is my pride and joy. This coil uses an oil filled secondary. A full sized spec. poster can be seen at:
The history and construction is at:
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:14PM
Pvt. Sparky Nov 13 2004
My latest project comes from the "Sue's Hall of Shame" files. I have not posted these in my online album yet, so I will post them here. This is my my SSTC that has gone through many changes, and the only progress I have made so far is that I ditched the antenna, and the MOSFETs don't blow up any more. I plan on trouble shooting my design using Dan's circuit. I am going to replace my stuff with his stuff a section at a time until the sparks get huge, and then I will know where I messed up. If I get up to the point where I replace my H bridge with his, and I still get no improvement, then I will know it's time for a new secondary.
Tesladownunder, Sat Feb 18 2006, 11:14PM
Pvt. Sparky Nov 13 2004
My latest project comes from the "Sue's Hall of Shame" files. I have not posted these in my online album yet, so I will post them here. This is my my SSTC that has gone through many changes, and the only progress I have made so far is that I ditched the antenna, and the MOSFETs don't blow up any more. I plan on trouble shooting my design using Dan's circuit. I am going to replace my stuff with his stuff a section at a time until the sparks get huge, and then I will know where I messed up. If I get up to the point where I replace my H bridge with his, and I still get no improvement, then I will know it's time for a new secondary.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:16PM
Pvt. Sparky Nov 13 2004
A view of the guts:
Tesladownunder, Sat Feb 18 2006, 11:16PM
Pvt. Sparky Nov 13 2004
A view of the guts:
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:18PM
Pvt. Sparky Nov 13 2004
They may not be very big, but the streamers are purty anyway.
Tesladownunder, Sat Feb 18 2006, 11:18PM
Pvt. Sparky Nov 13 2004
They may not be very big, but the streamers are purty anyway.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:19PM
Dr Resonance Nov 18 2004
This is submitted by Dr Resonance and shows one of his heavyweight commercial coils. 22 ft long sparks. Sec dia was 28 inches. Pri cap was 0.35 uF running at 24.5 kV DC peak.
If you want a new toy, give him a call.
Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo WI 53913
ps I'm not sure that I am happy about ear, eye or finger safety here! But he is probably just a realistic crash-test dummy.
Tesladownunder, Sat Feb 18 2006, 11:19PM
Dr Resonance Nov 18 2004
This is submitted by Dr Resonance and shows one of his heavyweight commercial coils. 22 ft long sparks. Sec dia was 28 inches. Pri cap was 0.35 uF running at 24.5 kV DC peak.
If you want a new toy, give him a call.
Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo WI 53913
ps I'm not sure that I am happy about ear, eye or finger safety here! But he is probably just a realistic crash-test dummy.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:21PM
Dr Resonance Nov 18 2004
Another shot of Dr Resonance's coil without the man (is this the mysterious DC).
"Even our Big Bruiser with it's 26 ft. long spark at 26 kVA was only
developing 865 kV! We thought it was over a megaVolt but measurements
provided the truth. Dr. Resonance"
Tesladownunder, Sat Feb 18 2006, 11:21PM
Dr Resonance Nov 18 2004
Another shot of Dr Resonance's coil without the man (is this the mysterious DC).
"Even our Big Bruiser with it's 26 ft. long spark at 26 kVA was only
developing 865 kV! We thought it was over a megaVolt but measurements
provided the truth. Dr. Resonance"
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:24PM
Otto Nov 15 2004
Here's my first homebrew coil setup:
It needs tuning and tidying up a bit, but for the ball park estimate the arcs shown in the bottom picture were pretty cool! Luckly, I've learned alot from this coil and my future coils will be even better! It's a 15-60 setup with 30kv .015 microF cap bank.
Here's a pic of it running, it's not the best, but the only one I have so far. I'm trying to get 4' arcs out of it, but I bet that will take a lof of tuning...right now I'm adjusting RQ gap, toroid size (to about 23.5 pF), and coupling.
Tesladownunder, Sat Feb 18 2006, 11:24PM
Otto Nov 15 2004
Here's my first homebrew coil setup:
It needs tuning and tidying up a bit, but for the ball park estimate the arcs shown in the bottom picture were pretty cool! Luckly, I've learned alot from this coil and my future coils will be even better! It's a 15-60 setup with 30kv .015 microF cap bank.
Here's a pic of it running, it's not the best, but the only one I have so far. I'm trying to get 4' arcs out of it, but I bet that will take a lof of tuning...right now I'm adjusting RQ gap, toroid size (to about 23.5 pF), and coupling.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:26PM
Pvt Sparky Nov 15 2004
Here is one of the three that are part of my art deco series.
I call it the Radical Radio.
Secondary: 9" x 1.5", 34AWG wire.
Primary: 6.5 turns of 10AWG wire on a 3.2" form.
Psu: 5KV,60mA NST.
Tank cap: 9.1nF.
Spark gap: Static - single gap with two 2" x 1" copper pipe.
A separate tuning coil in series with the primary solves the overcoupling problem, and tunes the circuit to resonance.
Tesladownunder, Sat Feb 18 2006, 11:26PM
Pvt Sparky Nov 15 2004
Here is one of the three that are part of my art deco series.
I call it the Radical Radio.
Secondary: 9" x 1.5", 34AWG wire.
Primary: 6.5 turns of 10AWG wire on a 3.2" form.
Psu: 5KV,60mA NST.
Tank cap: 9.1nF.
Spark gap: Static - single gap with two 2" x 1" copper pipe.
A separate tuning coil in series with the primary solves the overcoupling problem, and tunes the circuit to resonance.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 18 2006, 11:28PM
Pvt. Sparky NOv 18 2004
# 2 from the art deco series is "The Fix".
This was made as a gag gift for a friend of mine that is addicted to Tesla coiling(like most of us on here). He didn't want it so I got stuck with it, but now I am glad that he didn't take it. The appearance of it is very misleading. The secondary is the tiny little red thing on top which is a real syringe. The topload is a brass doorknob. The bottom is a cable spool that houses the OBIT which I only used half of the windings to get 5KV at 20mA. The copper pipe gap is in the PVC pipe on the top of the spool. The problem with this coil is lack of airflow through the gap, so it is fouled after a few minutes of run. I have to loosen a couple of screws and flip the pipe over to clean the gap. It's a really neat performer giving a four inch discharge which is the length of the secondary.
Tesladownunder, Sat Feb 18 2006, 11:28PM
Pvt. Sparky NOv 18 2004
# 2 from the art deco series is "The Fix".
This was made as a gag gift for a friend of mine that is addicted to Tesla coiling(like most of us on here). He didn't want it so I got stuck with it, but now I am glad that he didn't take it. The appearance of it is very misleading. The secondary is the tiny little red thing on top which is a real syringe. The topload is a brass doorknob. The bottom is a cable spool that houses the OBIT which I only used half of the windings to get 5KV at 20mA. The copper pipe gap is in the PVC pipe on the top of the spool. The problem with this coil is lack of airflow through the gap, so it is fouled after a few minutes of run. I have to loosen a couple of screws and flip the pipe over to clean the gap. It's a really neat performer giving a four inch discharge which is the length of the secondary.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 19 2006, 05:14AM
Pvt. Sparky Nov 15 2004
Here is a prescription for the medication posted above.
Tesladownunder, Sun Feb 19 2006, 05:14AM
Pvt. Sparky Nov 15 2004
Here is a prescription for the medication posted above.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 19 2006, 05:18AM
Pvt. Sparky Nov 15 2004
This is the last of the Art Deco coils. The tap point for the primary is built into the tone arm. If you want to "play tunes" with different top loads, you simply move the tone arm to a different part of the record (the primary). Spark length is 19". There is less than two inches of clearence between the NST and the primary. This decreases the performance. The spark length was 22 inches when all the components were all spread out all over the place during the testing phase. This doesn't concern me as this is more of a dynamic sculpture rather than a performer.
Tesladownunder, Sun Feb 19 2006, 05:18AM
Pvt. Sparky Nov 15 2004
This is the last of the Art Deco coils. The tap point for the primary is built into the tone arm. If you want to "play tunes" with different top loads, you simply move the tone arm to a different part of the record (the primary). Spark length is 19". There is less than two inches of clearence between the NST and the primary. This decreases the performance. The spark length was 22 inches when all the components were all spread out all over the place during the testing phase. This doesn't concern me as this is more of a dynamic sculpture rather than a performer.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:29PM
Cree Nov 17 2004
Another pictureless mini coil:
This coil is run off the same 7.5kv-30ma NST and it also has the same primary circuit as the other.
The primary is 7t telephone cord flat pancake
Secondary is 940t awg40 on a 3.8"x1.5" vitamin c canister
Topload is a doorknob i found on the ground or a 3" toroid(doorknob looks best). Record set : A nice 5" arc to the palm of my hand! the secondary had weird spots on it so i painted it
wah wah wah new mmc was so powerful that the coil arced alover it'self and self-destructed
Tesladownunder, Sat Feb 25 2006, 11:29PM
Cree Nov 17 2004
Another pictureless mini coil:
This coil is run off the same 7.5kv-30ma NST and it also has the same primary circuit as the other.
The primary is 7t telephone cord flat pancake
Secondary is 940t awg40 on a 3.8"x1.5" vitamin c canister
Topload is a doorknob i found on the ground or a 3" toroid(doorknob looks best). Record set : A nice 5" arc to the palm of my hand! the secondary had weird spots on it so i painted it
wah wah wah new mmc was so powerful that the coil arced alover it'self and self-destructed
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:31PM
Extreme Electronics Nov 21 2004
BigTess, (well for me anyway)
Power: 2 x 40mA 10Kv NST's
The Primary coil: is wound from 5mm copper tubing held by an acrylic framework, A modified fuse holder allows the tap to be varied.
The Secondary: is wound with 0.4mm diameter enamelled wire onto a 24" long 110mm(4") former made of PVC soil pipe. 1130 Turns.
The Topload: is 2 x 8" diameter mixing bowls.
Tesladownunder, Sat Feb 25 2006, 11:31PM
Extreme Electronics Nov 21 2004
BigTess, (well for me anyway)
Power: 2 x 40mA 10Kv NST's
The Primary coil: is wound from 5mm copper tubing held by an acrylic framework, A modified fuse holder allows the tap to be varied.
The Secondary: is wound with 0.4mm diameter enamelled wire onto a 24" long 110mm(4") former made of PVC soil pipe. 1130 Turns.
The Topload: is 2 x 8" diameter mixing bowls.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:34PM
Extreme Electronics Nov 21 2004
Output from Big Tess, Just under 3' Arcs
Derek
Tesladownunder, Sat Feb 25 2006, 11:34PM
Extreme Electronics Nov 21 2004
Output from Big Tess, Just under 3' Arcs
Derek
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:37PM
Hidden Dragon Nov 21 2004
Hehehehe, this was a very quick TC made all from TV parts (ecpet the topload), runs off a flyback, secondry is from the deflection coils, and caps are just as many high voltage ones that i could find, im amazed it actuly worked
Tesladownunder, Sat Feb 25 2006, 11:37PM
Hidden Dragon Nov 21 2004
Hehehehe, this was a very quick TC made all from TV parts (ecpet the topload), runs off a flyback, secondry is from the deflection coils, and caps are just as many high voltage ones that i could find, im amazed it actuly worked
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:39PM
Hidden Dragon Nov 21 2004
not the best for lenghth but the best quailty i could get.
Max lenght is 2.5inch
Tesladownunder, Sat Feb 25 2006, 11:39PM
Hidden Dragon Nov 21 2004
not the best for lenghth but the best quailty i could get.
Max lenght is 2.5inch
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:42PM
Cree Nov 24 2004
Here is another small coil just slightly over mini and way under medium size, it has the same old 7.5kv30ma NST and a new 9nf mmc
It has a 1200t sec and a 4 t primary
largest output 3" and 5" when used in a twin system
topload is a pingpong ball covered in alu foil
Tesladownunder, Sat Feb 25 2006, 11:42PM
Cree Nov 24 2004
Here is another small coil just slightly over mini and way under medium size, it has the same old 7.5kv30ma NST and a new 9nf mmc
It has a 1200t sec and a 4 t primary
largest output 3" and 5" when used in a twin system
topload is a pingpong ball covered in alu foil
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:43PM
Cree Nov 30 2004
here is my twin system running 7.5" arcs
Tesladownunder, Sat Feb 25 2006, 11:43PM
Cree Nov 30 2004
here is my twin system running 7.5" arcs
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:47PM
Fry Nov 30 2004
The first coil i ever made.
I was quiete happy with the results.
2 fluke 6 kv transformers is series for 12 kv.
Current controlled with a 8 A variac.
Max power approx 1000 watt.
Secondairy 5*22 cm, 1100t 0,15mm wire.
Primcap 12.5 nF, 12 cde 942's in series
Fres 350 kHz
2 electrode sparkgap blown with a jet of air from a 9 bar source.
Max spark to ground 50 cm. 30 cm streamers
Tesladownunder, Sat Feb 25 2006, 11:47PM
Fry Nov 30 2004
The first coil i ever made.
I was quiete happy with the results.
2 fluke 6 kv transformers is series for 12 kv.
Current controlled with a 8 A variac.
Max power approx 1000 watt.
Secondairy 5*22 cm, 1100t 0,15mm wire.
Primcap 12.5 nF, 12 cde 942's in series
Fres 350 kHz
2 electrode sparkgap blown with a jet of air from a 9 bar source.
Max spark to ground 50 cm. 30 cm streamers
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:49PM
Fry Nov 30 2004
sparks
Tesladownunder, Sat Feb 25 2006, 11:49PM
Fry Nov 30 2004
sparks
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:53PM
Fry Nov 30 2004
Big tes
My second coil.
I had some help with 2 friends that got into too it after seeing my first coil.
2 4.5 KVA 6KV transformers in series for 12 KV.
Current limited by 25 A variac.
Max power input sofar, approx. 1800 watts
Sec : 1200t 20 by 100 cm.
Wire 0.5 mm pvc insulated wire total, 0.7 mm.
Toroid: 18 by 80 cm
prim, 25 m of 12mm coppertubing.
primcap 43 nF 40 cde 942's, 4*10.
Fres 98 kHz
Max spark 185 cm, streamers 150 cm.
200 bps srsg, 3000 rpm with phase control.
I'm stil working on this coil. I think it's capable of much more.
Tesladownunder, Sat Feb 25 2006, 11:53PM
Fry Nov 30 2004
Big tes
My second coil.
I had some help with 2 friends that got into too it after seeing my first coil.
2 4.5 KVA 6KV transformers in series for 12 KV.
Current limited by 25 A variac.
Max power input sofar, approx. 1800 watts
Sec : 1200t 20 by 100 cm.
Wire 0.5 mm pvc insulated wire total, 0.7 mm.
Toroid: 18 by 80 cm
prim, 25 m of 12mm coppertubing.
primcap 43 nF 40 cde 942's, 4*10.
Fres 98 kHz
Max spark 185 cm, streamers 150 cm.
200 bps srsg, 3000 rpm with phase control.
I'm stil working on this coil. I think it's capable of much more.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Feb 25 2006, 11:59PM
Fry Nov 30 2004
Sparks
Tesladownunder, Sat Feb 25 2006, 11:59PM
Fry Nov 30 2004
Sparks
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:04AM
Jon Edenburg Nov 30 2004
This is Jon Edenberg's coil, presumably the worlds southernmost coil and completely constructed in the Australian Mawson Base in the Antarctic.
The construction is very neat.
Power is 6 MOT's
Tank cap 29.5uF rolled poly in oil
Primary 8T
Sec 6 x ??
Turns ?
Fres 154kHz
Toroid Foam ?30 x 70cm and ?20 x 50cm
Sparks 4.5 - 5 feet
Tesladownunder, Sun Feb 26 2006, 12:04AM
Jon Edenburg Nov 30 2004
This is Jon Edenberg's coil, presumably the worlds southernmost coil and completely constructed in the Australian Mawson Base in the Antarctic.
The construction is very neat.
Power is 6 MOT's
Tank cap 29.5uF rolled poly in oil
Primary 8T
Sec 6 x ??
Turns ?
Fres 154kHz
Toroid Foam ?30 x 70cm and ?20 x 50cm
Sparks 4.5 - 5 feet
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:06AM
Jon Edenburg Nov 30 2004
The ARSG which runs up to 12000 RPM.
Tesladownunder, Sun Feb 26 2006, 12:06AM
Jon Edenburg Nov 30 2004
The ARSG which runs up to 12000 RPM.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:10AM
Cree Dec 3 2004
another run of my small coil
Tesladownunder, Sun Feb 26 2006, 12:10AM
Cree Dec 3 2004
another run of my small coil
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:26AM
Tesladownunder Dec 5 2004
My first SSTC. I hooked up my Royer type circuit using 20A microwave oven IGBT's running on 30 V 10A. Primary is 1+1 turn of heavy Litz wire and for fun my secondary is my 18 x 48 inch 1100 turn coil. Resonant frequency is only 38kHz which is so low you could probably run it with SCR's. Spark initiates at 1/2 inch and the power arc goes to about 4 inches which is a bit like an NST in performance. Generally underwhelming though, given the secondary size.
I will update the pics if things improve. (Like running 250V interrupted with my 1200V 600A IGBT's with a proper primary setup).
Peter
Tesladownunder, Sun Feb 26 2006, 12:26AM
Tesladownunder Dec 5 2004
My first SSTC. I hooked up my Royer type circuit using 20A microwave oven IGBT's running on 30 V 10A. Primary is 1+1 turn of heavy Litz wire and for fun my secondary is my 18 x 48 inch 1100 turn coil. Resonant frequency is only 38kHz which is so low you could probably run it with SCR's. Spark initiates at 1/2 inch and the power arc goes to about 4 inches which is a bit like an NST in performance. Generally underwhelming though, given the secondary size.
I will update the pics if things improve. (Like running 250V interrupted with my 1200V 600A IGBT's with a proper primary setup).
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:29AM
Tesladownunder Dec 5 2004
The full setup. Even with this low voltage there is a fair bit of capacitative coupling to me standing this close.
Note the poorly coupled and diminutive primary.
Tesladownunder, Sun Feb 26 2006, 12:29AM
Tesladownunder Dec 5 2004
The full setup. Even with this low voltage there is a fair bit of capacitative coupling to me standing this close.
Note the poorly coupled and diminutive primary.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:48AM
Cree Dec 6 2004
i guess i might as well add my big tes here so here it is, input-15kv 30ma nst 20.4nf mmc (still way too small) not too impressive results but im happy with them(11")
Tesladownunder, Sun Feb 26 2006, 12:48AM
Cree Dec 6 2004
i guess i might as well add my big tes here so here it is, input-15kv 30ma nst 20.4nf mmc (still way too small) not too impressive results but im happy with them(11")
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:51AM
Extreme Electronics Dec 5 2004
Maggot , Mini magnifier
Power from an OBIT 10kv @20Ma
Primary 10T 2mm speaker cable with 3x2.2nF caps in parallel (6.6nF). Spark gap , Small Rotary.
Secondary 80mm tall of 0.25mm wire 300 turns. wound on a kitchen roll former(30mm diameter), then epoxy potted to 10mm all round. (primary wound around potting), top of coil extended 40mm and potted 5mm thick, end of coil capped with toroid made from 4mm copper tube. (pool made when a "cell" leaked during potting")
Tertiary Coil 1200T over 150mm of 0.125mm wire on kitchen roll former, bottom terminated in 4mm copper tube toroid, topload plastic egg from florest taped with aluminium tape 60mm diameter 110mm tall.
Total Size 260mm tall (10")
Output Depending on configuration 8-9" arcs
More details at
Tesladownunder, Sun Feb 26 2006, 12:51AM
Extreme Electronics Dec 5 2004
Maggot , Mini magnifier
Power from an OBIT 10kv @20Ma
Primary 10T 2mm speaker cable with 3x2.2nF caps in parallel (6.6nF). Spark gap , Small Rotary.
Secondary 80mm tall of 0.25mm wire 300 turns. wound on a kitchen roll former(30mm diameter), then epoxy potted to 10mm all round. (primary wound around potting), top of coil extended 40mm and potted 5mm thick, end of coil capped with toroid made from 4mm copper tube. (pool made when a "cell" leaked during potting")
Tertiary Coil 1200T over 150mm of 0.125mm wire on kitchen roll former, bottom terminated in 4mm copper tube toroid, topload plastic egg from florest taped with aluminium tape 60mm diameter 110mm tall.
Total Size 260mm tall (10")
Output Depending on configuration 8-9" arcs
More details at
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:52AM
Extreme Electronics Dec 11 2004
8"+ Streamers to air from Maggot.
Tesladownunder, Sun Feb 26 2006, 12:52AM
Extreme Electronics Dec 11 2004
8"+ Streamers to air from Maggot.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:53AM
kv Dec 15 2004
My 3" sgtc. This was my first coil with decent performance. The secondary is wound with 10" of 23awg. Primary is a 12-turn flat spiral. The coil runs off of a 15/30 nst with three wine bottle caps, but an MMC is in the mail and on its way. At the moment, max spark is 18".
Tesladownunder, Sun Feb 26 2006, 12:53AM
kv Dec 15 2004
My 3" sgtc. This was my first coil with decent performance. The secondary is wound with 10" of 23awg. Primary is a 12-turn flat spiral. The coil runs off of a 15/30 nst with three wine bottle caps, but an MMC is in the mail and on its way. At the moment, max spark is 18".
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:55AM
Pvt. Sparky Dec 25 2004
Here is a project that I need to go back to, and redesign after I get tired of the solid state stuff. This is a tube coil employing a 304TL that was completely designed wrong. The neat thing about it is that it makes up for its lack of spark length with power arcs that are hotter than the average VTTC. It's like flames comming out of the torroid! This thing is also an induction heater due to massive primary currents. The little ground screw at the bottom of the secondary got so hot that it burned the wooden support near the screw. You can see the SGTC in the bacckground. It is 60KHz lower than the VTTC, but when I ran the VTTC, some arcing was going on in the SGTC somewhere, and I could hear it. I also smelled wood burning, so I would have to move the SGTC out of the room when I ran the tube coil! My friend was getting RF burns off of everything he touched in my room. Playing with this coil is very dangerous because of all the RF radiation it produces! I worry about the possibility of a hidden fire starting somewhere.
Tesladownunder, Sun Feb 26 2006, 12:55AM
Pvt. Sparky Dec 25 2004
Here is a project that I need to go back to, and redesign after I get tired of the solid state stuff. This is a tube coil employing a 304TL that was completely designed wrong. The neat thing about it is that it makes up for its lack of spark length with power arcs that are hotter than the average VTTC. It's like flames comming out of the torroid! This thing is also an induction heater due to massive primary currents. The little ground screw at the bottom of the secondary got so hot that it burned the wooden support near the screw. You can see the SGTC in the bacckground. It is 60KHz lower than the VTTC, but when I ran the VTTC, some arcing was going on in the SGTC somewhere, and I could hear it. I also smelled wood burning, so I would have to move the SGTC out of the room when I ran the tube coil! My friend was getting RF burns off of everything he touched in my room. Playing with this coil is very dangerous because of all the RF radiation it produces! I worry about the possibility of a hidden fire starting somewhere.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:57AM
Pvt. Sparky Dec 25 2004
Here is a pic of the output flame. That is one hot little arc!
Tesladownunder, Sun Feb 26 2006, 12:57AM
Pvt. Sparky Dec 25 2004
Here is a pic of the output flame. That is one hot little arc!
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 12:59AM
Pvt. Sparky Dec 25 2004
...and here are the guts. In case you are wondering about the extreamly loose coupling in the first picture; It was discovered that the tube kept dropping out of oscillation and going into thermal runaway when I had tighter coupling. I couldn't figure out what was going on, and figured that it must be oscillating at some other wierd frequency when it did that. Parasitic supressers didn't help. the only fix was to reduce the coupling. VTTCs can do some strange things when the mood strikes them!
Tesladownunder, Sun Feb 26 2006, 12:59AM
Pvt. Sparky Dec 25 2004
...and here are the guts. In case you are wondering about the extreamly loose coupling in the first picture; It was discovered that the tube kept dropping out of oscillation and going into thermal runaway when I had tighter coupling. I couldn't figure out what was going on, and figured that it must be oscillating at some other wierd frequency when it did that. Parasitic supressers didn't help. the only fix was to reduce the coupling. VTTCs can do some strange things when the mood strikes them!
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:01AM
Tesladownunder Jan 7 2005
SIDAC spark gap substitute.
This is a proof of principle coil rather than a big performer. It uses SIDAC's in place of a spark gap (As I use them which is with the tank cap across the supply rather than the spark gap across the supply). These are symmetrical breakdown devices
As set up at present it is driven by a MOT transformer with the associated 11kV diode and 0.95uF capacitor in a voltage doubler arrangement to provide 5.8kV or so. This is dumped by a SIDAC or rather 22 in series each shunted by 1 megOhm. Each SIDAC is rated to breakdown at 240V and has a 1A RMS or 130A 10uS pulse capacity. The string of 22 SIDAC's will nominally breakdown at 5280V. SIDAC's act similarly to a sparkgap.
The SIDAC's cost US$1.33 each in 10 quantity at Digikey.
Also shown running ignition coils (with much better performance) here:
This might have application for small coils running low voltages where spark gaps become problematic, but without the complexity of an SSTC.
Is this therefore a SIDAC spark substitute solid state Tesla coil. (SSSSSTC)?
Pic shows 2 inch sparks on my 4 inch coil (5 kV in 60kV out). I later used 47 SIDAC's each shunted with 1M :uomega:. I could get small streamers but not much more regular spark length. If I used a spark gap in series with the SIDAC's the spark length increase was marked and over 6 inches. I interpret this to indicate that quenching is not really happening with the SIDAC's alone. I had hoped the SIDAC's recovery when the current drops would do this but apparently not well enough.
Tesladownunder, Sun Feb 26 2006, 01:01AM
Tesladownunder Jan 7 2005
SIDAC spark gap substitute.
This is a proof of principle coil rather than a big performer. It uses SIDAC's in place of a spark gap (As I use them which is with the tank cap across the supply rather than the spark gap across the supply). These are symmetrical breakdown devices
As set up at present it is driven by a MOT transformer with the associated 11kV diode and 0.95uF capacitor in a voltage doubler arrangement to provide 5.8kV or so. This is dumped by a SIDAC or rather 22 in series each shunted by 1 megOhm. Each SIDAC is rated to breakdown at 240V and has a 1A RMS or 130A 10uS pulse capacity. The string of 22 SIDAC's will nominally breakdown at 5280V. SIDAC's act similarly to a sparkgap.
The SIDAC's cost US$1.33 each in 10 quantity at Digikey.
Also shown running ignition coils (with much better performance) here:
This might have application for small coils running low voltages where spark gaps become problematic, but without the complexity of an SSTC.
Is this therefore a SIDAC spark substitute solid state Tesla coil. (SSSSSTC)?
Pic shows 2 inch sparks on my 4 inch coil (5 kV in 60kV out). I later used 47 SIDAC's each shunted with 1M :uomega:. I could get small streamers but not much more regular spark length. If I used a spark gap in series with the SIDAC's the spark length increase was marked and over 6 inches. I interpret this to indicate that quenching is not really happening with the SIDAC's alone. I had hoped the SIDAC's recovery when the current drops would do this but apparently not well enough.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:02AM
Reaching Jan 26 2005
hello. this is my newest spark gap tesla coil. it is powered by a 6kV 120mA nst.the caps are two high voltage capacitors in series ,each ratet with 50nF @ 16kV .it seems to me, that the performance of the coil is very good. output is 60 to 80cm (24"- 32") the coilform is an 4,4" x 18" pp , wired with 900turns of 0,5mm enameled wire. the primary is 6 turns of mercury string. the topload is a little bit to small, i know. it was made from a aluflex pipe. the size is 10cm x 30 in diameter.
Tesladownunder, Sun Feb 26 2006, 01:02AM
Reaching Jan 26 2005
hello. this is my newest spark gap tesla coil. it is powered by a 6kV 120mA nst.the caps are two high voltage capacitors in series ,each ratet with 50nF @ 16kV .it seems to me, that the performance of the coil is very good. output is 60 to 80cm (24"- 32") the coilform is an 4,4" x 18" pp , wired with 900turns of 0,5mm enameled wire. the primary is 6 turns of mercury string. the topload is a little bit to small, i know. it was made from a aluflex pipe. the size is 10cm x 30 in diameter.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:04AM
Reaching Jan 26 2005
here is the earlyer version of that coil. it has a smaller secondary and a primary on a wooden plate. wood isnt good for teslacoils .a spark hit the wood and burned it.
Tesladownunder, Sun Feb 26 2006, 01:04AM
Reaching Jan 26 2005
here is the earlyer version of that coil. it has a smaller secondary and a primary on a wooden plate. wood isnt good for teslacoils .a spark hit the wood and burned it.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:09AM
Dit Bestand Jan 26 2005
Hello,
this is my second tesla coil it's performing quite well (does anybody know what the maxium spark length is with a 350 watt power supply?)
specs:
Power nst 8kv 50 mA (yeah i know it's an 400 watt nst but my filter dispens 50 watt in heat in the resistors )
33nf MMC.
8 turn primary
1000 turn secondary
2 toroids 10 x 40 cm and 12.5 x 50 cm
spark length 1.05 meter
Single static gap blown by a vaccum cleaner.
here is a picture of my coil arcing 1 meter
Tesladownunder, Sun Feb 26 2006, 01:09AM
Dit Bestand Jan 26 2005
Hello,
this is my second tesla coil it's performing quite well (does anybody know what the maxium spark length is with a 350 watt power supply?)
specs:
Power nst 8kv 50 mA (yeah i know it's an 400 watt nst but my filter dispens 50 watt in heat in the resistors )
33nf MMC.
8 turn primary
1000 turn secondary
2 toroids 10 x 40 cm and 12.5 x 50 cm
spark length 1.05 meter
Single static gap blown by a vaccum cleaner.
here is a picture of my coil arcing 1 meter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:11AM
Reaching Jan 27 2005
this was our ballcoil . it has no rf grounding. the ground of the secondary goes directly in the primary coil. i dont know if this was very healthy the whole setup were build on a 16cm x 25cm wooden plate. the weight was only about 4lbs (2kg)..
Tesladownunder, Sun Feb 26 2006, 01:11AM
Reaching Jan 27 2005
this was our ballcoil . it has no rf grounding. the ground of the secondary goes directly in the primary coil. i dont know if this was very healthy the whole setup were build on a 16cm x 25cm wooden plate. the weight was only about 4lbs (2kg)..
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:13AM
Hammertone Jan 31 2005
Some of you will remember the coil I showed in the 3-D modelling thread.
Here it is in real life...
Cheers, Finn Hammer
Tesladownunder, Sun Feb 26 2006, 01:13AM
Hammertone Jan 31 2005
Some of you will remember the coil I showed in the 3-D modelling thread.
Here it is in real life...
Cheers, Finn Hammer
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:15AM
Syd Klinge Feb 1 2005
Syd Klinge's "Cauac"
The Big Day Out is a rock concert that tours major Australian cities with over 40 local and international bands. The inducement for me to travel 3000Km to see it was one of the side attractions, Syd Klinge's 'Cauac' 16 foot coil running at 100KVA. I was fortunate enough to meet the charismatic Syd and his entourage to talk coiling and see it run. It runs from a portable generator rated at ?170 KVA 3 phase ?480V using if I recall correctly one 11 KV pig for each of the 3 phases each individually ballasted. The output is rectified using over 1000 1N4007's to DC then through an RF filter to the base of the coil and the spark gap which is ARSG using 1/2 inch tungsten electrodes. Tank cap was two 0.1 uF custom made units. Resonant frequency is 59 kHz. The secondary is 10 feet tall and 16 feet total height. The winding is crosslinked PVC coated. Toroid is chicken wire covered.
Further pics on my site
If Syd joins 4HV he may be able to give better pics and details.
Three days after this pleasant day, Melbourne had 5 inches of rain in one day which was an all time one day record.
Tesladownunder, Sun Feb 26 2006, 01:15AM
Syd Klinge Feb 1 2005
Syd Klinge's "Cauac"
The Big Day Out is a rock concert that tours major Australian cities with over 40 local and international bands. The inducement for me to travel 3000Km to see it was one of the side attractions, Syd Klinge's 'Cauac' 16 foot coil running at 100KVA. I was fortunate enough to meet the charismatic Syd and his entourage to talk coiling and see it run. It runs from a portable generator rated at ?170 KVA 3 phase ?480V using if I recall correctly one 11 KV pig for each of the 3 phases each individually ballasted. The output is rectified using over 1000 1N4007's to DC then through an RF filter to the base of the coil and the spark gap which is ARSG using 1/2 inch tungsten electrodes. Tank cap was two 0.1 uF custom made units. Resonant frequency is 59 kHz. The secondary is 10 feet tall and 16 feet total height. The winding is crosslinked PVC coated. Toroid is chicken wire covered.
Further pics on my site
If Syd joins 4HV he may be able to give better pics and details.
Three days after this pleasant day, Melbourne had 5 inches of rain in one day which was an all time one day record.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:16AM
Syd Klinge Feb 1 2005
The "piggery". Only the 3 smaller pigs are in use. Air-gapped ballast inductors on each 3 phase line.
Peter
Tesladownunder, Sun Feb 26 2006, 01:16AM
Syd Klinge Feb 1 2005
The "piggery". Only the 3 smaller pigs are in use. Air-gapped ballast inductors on each 3 phase line.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:18AM
Tesladownunder Feb 23 2005
Multi-layer Tesla coil
Yes this is a spark gap driven air cored resonant transformer, ie Tesla coil. This is a 500 meter roll of 2.5mm multicore electrical wire. It is probably about 1000 turns, ie similar to my current 4 inch coil. It has been placed on top of my primary and is resonant at 38kHz with the 90nF MMC tank cap. No real attempt to tune or to optimise coupling.
Shown here with 3 inch sparks and a lot of inter turn corona and breakdown.
Tesladownunder, Sun Feb 26 2006, 01:18AM
Tesladownunder Feb 23 2005
Multi-layer Tesla coil
Yes this is a spark gap driven air cored resonant transformer, ie Tesla coil. This is a 500 meter roll of 2.5mm multicore electrical wire. It is probably about 1000 turns, ie similar to my current 4 inch coil. It has been placed on top of my primary and is resonant at 38kHz with the 90nF MMC tank cap. No real attempt to tune or to optimise coupling.
Shown here with 3 inch sparks and a lot of inter turn corona and breakdown.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:19AM
Tesladownunder Feb 27 2005
Multi-layer Tesla coil
My plan is to optimise this to get the highest possible sparklength to coil length ratio.
I plan to do this by using the same wire as above but in a multi helical coil arrangement. Using a single winding of insulated wire (the PVC will hold off a much higher voltage) and a double spacer between each helix (where the wire goes from outside in to start the next helix I hope to maintain a high standoff voltage between turns plus a higher voltage between helices.
With everything under oil I hope to be able to prevent racing arcs and allow reasonably high coupling. There will be high quenching with the 1400bps ARSG and reasonable power of up to 5kVA from the 4 MOT supply. I would aim for a height of one foot for the coil with 3 inch internal diameter and ?10 inch external. I would hope for 800 turns plus. Coil DC resistance is 3.5ohms.
It will be mounted in an acrylic tube and will probably need large insulating rings to prevent surface tracking and a large insulated base to avoid primary to secondary strikes,
I will add a pic as things progress.
Performance may be reduced by the much higher distributed capacitance and breakdown internally or externally. If all else fails I have a good ballast. Any comments or suggestions to the ** Comments on Add your Tesla coil here ** thread.
Peter
Tesladownunder, Sun Feb 26 2006, 01:19AM
Tesladownunder Feb 27 2005
Multi-layer Tesla coil
My plan is to optimise this to get the highest possible sparklength to coil length ratio.
I plan to do this by using the same wire as above but in a multi helical coil arrangement. Using a single winding of insulated wire (the PVC will hold off a much higher voltage) and a double spacer between each helix (where the wire goes from outside in to start the next helix I hope to maintain a high standoff voltage between turns plus a higher voltage between helices.
With everything under oil I hope to be able to prevent racing arcs and allow reasonably high coupling. There will be high quenching with the 1400bps ARSG and reasonable power of up to 5kVA from the 4 MOT supply. I would aim for a height of one foot for the coil with 3 inch internal diameter and ?10 inch external. I would hope for 800 turns plus. Coil DC resistance is 3.5ohms.
It will be mounted in an acrylic tube and will probably need large insulating rings to prevent surface tracking and a large insulated base to avoid primary to secondary strikes,
I will add a pic as things progress.
Performance may be reduced by the much higher distributed capacitance and breakdown internally or externally. If all else fails I have a good ballast. Any comments or suggestions to the ** Comments on Add your Tesla coil here ** thread.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:21AM
EDY 19 March 1 2005
Heres the newest:
6000VAC 30ma NST
flat 12 turn tuned at 10 turns primary
2.4 inch 10.5 inch long Secondary + 1.9"x7.5"
34 gauge wire (about 1000 turns)
Capbank: 54 mylar capacitors for 11340Volts, .015uf
Spark Gap- Single Static Gap
Now 10 inch arcs are obtainable to a grounded wand,
and about the same streamers to air. I replaced the torroid to a 3"x12", and placed another smaller coil on top which increased spark length some more tried everything in order to get everything i can get out of the 6000Vx30ma NST I guess this is inbetween tesla and tesla magnifier?
Tesladownunder, Sun Feb 26 2006, 01:21AM
EDY 19 March 1 2005
Heres the newest:
6000VAC 30ma NST
flat 12 turn tuned at 10 turns primary
2.4 inch 10.5 inch long Secondary + 1.9"x7.5"
34 gauge wire (about 1000 turns)
Capbank: 54 mylar capacitors for 11340Volts, .015uf
Spark Gap- Single Static Gap
Now 10 inch arcs are obtainable to a grounded wand,
and about the same streamers to air. I replaced the torroid to a 3"x12", and placed another smaller coil on top which increased spark length some more tried everything in order to get everything i can get out of the 6000Vx30ma NST I guess this is inbetween tesla and tesla magnifier?
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:23AM
NIK March 21 2005
This is my first coil and it goes as follows:
triple mot power suply, around 6kv at about a quarter amp
9turn priamry tapped at 6,7 or 9 (depending on the topload)
4.5in 12.75in long secondary 30gauge wire (about 1250 turns)
home made foil+plastic caps 16square feet of surface area
vacume quenched single spark gap (2 copper pipe electrodes)
top load is a 2in doorknob (best for streamers)
Arcs to ground up to 8in and streamers up to 6in. Still needs alot of work.
(photo exposure of 1sec)
Tesladownunder, Sun Feb 26 2006, 01:23AM
NIK March 21 2005
This is my first coil and it goes as follows:
triple mot power suply, around 6kv at about a quarter amp
9turn priamry tapped at 6,7 or 9 (depending on the topload)
4.5in 12.75in long secondary 30gauge wire (about 1250 turns)
home made foil+plastic caps 16square feet of surface area
vacume quenched single spark gap (2 copper pipe electrodes)
top load is a 2in doorknob (best for streamers)
Arcs to ground up to 8in and streamers up to 6in. Still needs alot of work.
(photo exposure of 1sec)
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:25AM
Robert Golka April 1 2005
I will add the occasional coil that is a classic or interesting and accessible on the web.
Robert Golka's coil from 1981 which was a magnifier running 160kVA from a diesel railway engine generator (44kV and tank cap was 0.2uF). It used a car to drive a serrated sparkgap wheel.
Primary 1 turn 51 ft diam, Secondary 51 ft 26 turns, 8 feet high, magnifier coil 100 turns 8 ft high, base 12 ft high. Spark length (measured by me from photo) in excess of 32ft. (Note total height of secondary and magnifier coil is 16 feet hence total spark length to coil ratio is 2.0)
See the huge primary/secondary.
Peter
Tesladownunder, Sun Feb 26 2006, 01:25AM
Robert Golka April 1 2005
I will add the occasional coil that is a classic or interesting and accessible on the web.
Robert Golka's coil from 1981 which was a magnifier running 160kVA from a diesel railway engine generator (44kV and tank cap was 0.2uF). It used a car to drive a serrated sparkgap wheel.
Primary 1 turn 51 ft diam, Secondary 51 ft 26 turns, 8 feet high, magnifier coil 100 turns 8 ft high, base 12 ft high. Spark length (measured by me from photo) in excess of 32ft. (Note total height of secondary and magnifier coil is 16 feet hence total spark length to coil ratio is 2.0)
See the huge primary/secondary.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:37AM
Robert Golka April 1 2005
In case anyone has a spare aircraft hangar and diesel engine here is the circuit diagram of Golkas coil.
A clearer picture is here.
Peter
Tesladownunder, Sun Feb 26 2006, 01:37AM
Robert Golka April 1 2005
In case anyone has a spare aircraft hangar and diesel engine here is the circuit diagram of Golkas coil.
A clearer picture is here.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:39AM
Reaching April 4 2005
i´ve finished my newest solid state tesla coil. it is powered by a halfbridge with two irfp460mosfets. input voltage is 230volt halfwave rectified.the driver is manual tuning.primary windings 7. secondary 11x22cm wound with 0,2mm wire. streamer lenght is about 20-30cm vttc like.
Tesladownunder, Sun Feb 26 2006, 01:39AM
Reaching April 4 2005
i´ve finished my newest solid state tesla coil. it is powered by a halfbridge with two irfp460mosfets. input voltage is 230volt halfwave rectified.the driver is manual tuning.primary windings 7. secondary 11x22cm wound with 0,2mm wire. streamer lenght is about 20-30cm vttc like.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:42AM
John Grun April 5 2005
The $h!T C()!L
3 by 8 secondary
4 mots
50 nf cap
Tesladownunder, Sun Feb 26 2006, 01:42AM
John Grun April 5 2005
The $h!T C()!L
3 by 8 secondary
4 mots
50 nf cap
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:45AM
Scorper April 26 2005
Here's my friends newest project that he's been tinkering with, a dual primary SSTC.
It has two full-bridges, both of them drive a separate primary straight from rectified mains (230VAC). Current arclength is around 20" (or 50cm).
The full-bridges have IRFP460s as FETs, 4" secondary with 1400 turns and a 2x9 turn primary, Fres is around 175kHz.
The driver is a PLL, feedback taken via a CT from the secondarys ground wire, and interrupted with a adjustable frequency to get diffrent kind of streamers.
Tesladownunder, Sun Feb 26 2006, 01:45AM
Scorper April 26 2005
Here's my friends newest project that he's been tinkering with, a dual primary SSTC.
It has two full-bridges, both of them drive a separate primary straight from rectified mains (230VAC). Current arclength is around 20" (or 50cm).
The full-bridges have IRFP460s as FETs, 4" secondary with 1400 turns and a 2x9 turn primary, Fres is around 175kHz.
The driver is a PLL, feedback taken via a CT from the secondarys ground wire, and interrupted with a adjustable frequency to get diffrent kind of streamers.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 01:58AM
Scorper April 26 2005
Here it is throwing around 20" (50cm) streamers
Tesladownunder, Sun Feb 26 2006, 01:58AM
Scorper April 26 2005
Here it is throwing around 20" (50cm) streamers
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 02:01AM
Reaching May 1 2005
our newest solid state work. the coil is a 22cm 7,5cm wound with 0,2mm enammeled wire. the oscillator is a 4046pll . the halfbridge uses 2 irf740 mosfets. primary coil is 9 turns. discharges are about 15 to 20cm
Tesladownunder, Sun Feb 26 2006, 02:01AM
Reaching May 1 2005
our newest solid state work. the coil is a 22cm 7,5cm wound with 0,2mm enammeled wire. the oscillator is a 4046pll . the halfbridge uses 2 irf740 mosfets. primary coil is 9 turns. discharges are about 15 to 20cm
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 02:02AM
cTc-Basti May 2 2005
This is my first SSTC.
The driver and the half-bridge are nearly the same Reaching used for his coil.
It has got some more primary turns, so the two IRFP460 will live a bit longer.
Tesladownunder, Sun Feb 26 2006, 02:02AM
cTc-Basti May 2 2005
This is my first SSTC.
The driver and the half-bridge are nearly the same Reaching used for his coil.
It has got some more primary turns, so the two IRFP460 will live a bit longer.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 02:03AM
cTc-Basti May 2 2005
Some nice sparks...
Tesladownunder, Sun Feb 26 2006, 02:03AM
cTc-Basti May 2 2005
Some nice sparks...
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 02:05AM
StarWarsFanatic May 6 2005
This is my first tesla coil.
SPECS:
Power Supply: 12,000v 30ma nst (franceformer)
Secondary: 3/4" wide 3" long, about 400 turns of some wire I found on the side of the road.
Primary: 4 turn pancake
Capacitor: 1 pepsi bottle filled with saltwater and oil,wrapped with foil
Total time spent:about 3 hours
Tesladownunder, Sun Feb 26 2006, 02:05AM
StarWarsFanatic May 6 2005
This is my first tesla coil.
SPECS:
Power Supply: 12,000v 30ma nst (franceformer)
Secondary: 3/4" wide 3" long, about 400 turns of some wire I found on the side of the road.
Primary: 4 turn pancake
Capacitor: 1 pepsi bottle filled with saltwater and oil,wrapped with foil
Total time spent:about 3 hours
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 02:07AM
Tom May 6 2005
Yeah here's my little coil.
It's making about 15 inch sparks to grounded objects
Some specs:
9kV, 30mA transformer
CDE 942 caps, 12.5nf, 8 caps in series
Secondary coils is 2.35" by 13", uses 28AWG, which is 945 turns in total
toroid is 3" by 8.5", so it's about 8.35pF
oh yeah for some reason the table itself is a tad uneven (not the coil's cabinet) and it really shows by looking at the secondary coil
anyway this is my first coil I build it a while ago
Tesladownunder, Sun Feb 26 2006, 02:07AM
Tom May 6 2005
Yeah here's my little coil.
It's making about 15 inch sparks to grounded objects
Some specs:
9kV, 30mA transformer
CDE 942 caps, 12.5nf, 8 caps in series
Secondary coils is 2.35" by 13", uses 28AWG, which is 945 turns in total
toroid is 3" by 8.5", so it's about 8.35pF
oh yeah for some reason the table itself is a tad uneven (not the coil's cabinet) and it really shows by looking at the secondary coil
anyway this is my first coil I build it a while ago
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 02:10AM
Tesladownunder May 14 2005
VTTC
This is my vacuum tube (valve) Tesla coil. I am using a Philips TB3/750 power triode rated at 3 kV 1 kW with a 5 V 14 A filament. The high voltage comes from a microwave oven transformer (MOT) and doubler. The filament supply is from a rewound microwave oven transformer to give the 5 V. This is largely a copy of Steve Ward's VTTC modified to use parts I had on hand.
Primary is 27 turns, tapped on the last 10, feedback is around 22 turns, secondary most recently is 750 turns of 26G on 12 inches 3 1/2 inch PVC. Power is a voltage doubled MOT.
Not really tuned yet and a number of modifications are needed.
Peter
Tesladownunder, Sun Feb 26 2006, 02:10AM
Tesladownunder May 14 2005
VTTC
This is my vacuum tube (valve) Tesla coil. I am using a Philips TB3/750 power triode rated at 3 kV 1 kW with a 5 V 14 A filament. The high voltage comes from a microwave oven transformer (MOT) and doubler. The filament supply is from a rewound microwave oven transformer to give the 5 V. This is largely a copy of Steve Ward's VTTC modified to use parts I had on hand.
Primary is 27 turns, tapped on the last 10, feedback is around 22 turns, secondary most recently is 750 turns of 26G on 12 inches 3 1/2 inch PVC. Power is a voltage doubled MOT.
Not really tuned yet and a number of modifications are needed.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Feb 26 2006, 02:12AM
Tesladownunder May 6 2005
A slightly improved version demonstrating the sword like character of high frequency VTTC or SSTC sparks. Sparks still only 4 inches at this stage.
Peter
Tesladownunder, Sun Feb 26 2006, 02:12AM
Tesladownunder May 6 2005
A slightly improved version demonstrating the sword like character of high frequency VTTC or SSTC sparks. Sparks still only 4 inches at this stage.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:34AM
Tesladownunder May 14 2005
My 1972 'accidental' Tesla coil - a reconstruction
My first TC was 'discovered' while running a spark spectroscopy project at home in 1972. This used about 10 kV from multivibrator excited dual ignition coils with a capacitor across them and then damped with 10 turns of an air cored radio coil. The other end of the 130 turn coil developed a corona visible in the dark spectroscopy room. It was a truly amazing sight.
Somewhat remarkably, this was an inadvertent Tesla coil complete with spark gap, tank cap and air-cored coil AND it worked unintentionally.
This is a picture of the original high voltage setup with the spectroscope shown open and the HV diode, air cored coil and cap made of 6 x 0.0033uF 3kV ceramics in series to give 550pF. The spark gap with clips to hold the metal being examined spectroscopically is also shown.
Peter
Tesladownunder, Mon Mar 27 2006, 12:34AM
Tesladownunder May 14 2005
My 1972 'accidental' Tesla coil - a reconstruction
My first TC was 'discovered' while running a spark spectroscopy project at home in 1972. This used about 10 kV from multivibrator excited dual ignition coils with a capacitor across them and then damped with 10 turns of an air cored radio coil. The other end of the 130 turn coil developed a corona visible in the dark spectroscopy room. It was a truly amazing sight.
Somewhat remarkably, this was an inadvertent Tesla coil complete with spark gap, tank cap and air-cored coil AND it worked unintentionally.
This is a picture of the original high voltage setup with the spectroscope shown open and the HV diode, air cored coil and cap made of 6 x 0.0033uF 3kV ceramics in series to give 550pF. The spark gap with clips to hold the metal being examined spectroscopically is also shown.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:35AM
Tesladownunder May 14 2005
My 1972 'accidental' Tesla coil - a reconstruction
This is a reconstruction which took about an hour to make. It uses the same size cardboard former as the old one 45x100mm which had to be reinforced with PVC. (Toilet rolls are not as strong in 2005 as 1972 ) The wire gauge is 0.40mm (prev 0.6mm) and is wound to 130 turns with multiple taps between 10 and 20 turns. The caps were 6 x 0.01 3KV = 1600pF (prev 550pF) and power supply was my SIDAC driven twin ignition coil setup.
Spark gap was about 2mm as anything higher gave racing arcs! It is not tuned due to the different caps and smaller wire gauge. Primary arcing was taking place from the tap points but in the original the first tap at 10 turns was the one I used.
Spark length was only 1cm but corona was visible with dark adapted vision.
Peter
Tesladownunder, Mon Mar 27 2006, 12:35AM
Tesladownunder May 14 2005
My 1972 'accidental' Tesla coil - a reconstruction
This is a reconstruction which took about an hour to make. It uses the same size cardboard former as the old one 45x100mm which had to be reinforced with PVC. (Toilet rolls are not as strong in 2005 as 1972 ) The wire gauge is 0.40mm (prev 0.6mm) and is wound to 130 turns with multiple taps between 10 and 20 turns. The caps were 6 x 0.01 3KV = 1600pF (prev 550pF) and power supply was my SIDAC driven twin ignition coil setup.
Spark gap was about 2mm as anything higher gave racing arcs! It is not tuned due to the different caps and smaller wire gauge. Primary arcing was taking place from the tap points but in the original the first tap at 10 turns was the one I used.
Spark length was only 1cm but corona was visible with dark adapted vision.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:36AM
kv May 15 2005
This is my 2MOT coil. I don't like to complicate things so this coil is about as simple as it gets. Two MOTs ballasted by a 70 amp arc welder in series and run off a 120volt 15amp circuit without any trouble. Tank cap is 75nf mmc style and the gap is the inside-out sucker gap quenched by a 3.5hp shop vac, which just barely does the job. Primary is 3/8 copper pipe tapped at 2.5 turns and primary wiring is three 12awg stranded wires for each connection, which still gets hot. Topload is an 8 inch lighting globe covered in aluminum tape. Secondary is around 800 turns of 23awg wire. Sparks in the photo are about two feet, but frequent. Longest confirmed spark was three feet to a grounded rod.
Tesladownunder, Mon Mar 27 2006, 12:36AM
kv May 15 2005
This is my 2MOT coil. I don't like to complicate things so this coil is about as simple as it gets. Two MOTs ballasted by a 70 amp arc welder in series and run off a 120volt 15amp circuit without any trouble. Tank cap is 75nf mmc style and the gap is the inside-out sucker gap quenched by a 3.5hp shop vac, which just barely does the job. Primary is 3/8 copper pipe tapped at 2.5 turns and primary wiring is three 12awg stranded wires for each connection, which still gets hot. Topload is an 8 inch lighting globe covered in aluminum tape. Secondary is around 800 turns of 23awg wire. Sparks in the photo are about two feet, but frequent. Longest confirmed spark was three feet to a grounded rod.
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:37AM
Boshi May 16 2005
Got my first one working decently.
12KV neon sign transformer
20 nF / 30KV MMC
21" long, 3.5" diameter secondary
about 6 turn primary
Tesladownunder, Mon Mar 27 2006, 12:37AM
Boshi May 16 2005
Got my first one working decently.
12KV neon sign transformer
20 nF / 30KV MMC
21" long, 3.5" diameter secondary
about 6 turn primary
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:44AM
ICC May 27 2005
Hi, here are pictures showing my first tesla coil.
It's powered by 4 parallel OBITs, 12 leyden jars as the primary cap.
More info ->
(Can't get the pics for some reason - check the site out directly)
Tesladownunder, Mon Mar 27 2006, 12:44AM
ICC May 27 2005
Hi, here are pictures showing my first tesla coil.
It's powered by 4 parallel OBITs, 12 leyden jars as the primary cap.
More info ->
(Can't get the pics for some reason - check the site out directly)
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:45AM
Teslacoiler June 3 2005
Hi All!
This is my plasma cigarette lighter!
Is powered by a PL509 and runs at 17,5MHz with voltage doubler whitout insulation from mains.
No primary LC circuit required, this circuit is a self tuning tesla magnifier!
Photo taken at Vimercate2005 Teslathon (16 April 2005)
Tesladownunder, Mon Mar 27 2006, 12:45AM
Teslacoiler June 3 2005
Hi All!
This is my plasma cigarette lighter!
Is powered by a PL509 and runs at 17,5MHz with voltage doubler whitout insulation from mains.
No primary LC circuit required, this circuit is a self tuning tesla magnifier!
Photo taken at Vimercate2005 Teslathon (16 April 2005)
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:46AM
Teslacoiler June 3 2005
Hi All!
This is my last coil:
Status of design: Prototype under development
Maximum streamers lenght: approx 25cm @ 140Vac input
UPDATE: 35cm on 180V by changing the inductor
Maximum spark and arks lenght: N/A ( IGBTs die at first spark! )
Maximum input voltage whithout damages: 140Vac ( my goal is 230Vac! )
Driver: pure sinusoidal, ZVS resonant oscillator based on ROYER circuitry
Mode: fullwawe only (halfwawe and CW modes will be added sooner or later)
UPDATE: others mode tested; fullwawe seems to be the best mode, strangely halfwawe give shorter streamers!
Tank capacitor: 150nF MMC ( MKP-HQ )
Primary coil: 4+4+4+4 turns of 2.5 sqmm PVC insulated cable wound in qudrifilar over a 21cm coilform
Secondary coil: 2720 turns of 0,18mm magnet wire over a 16cm coilform, 49cm winding height.
Resonant frequency: 94KHz
Damaged silicon: 6 IGBTs, 8 zener diodes, 6 ultrafast diodes (yet!)
UPDATE: 8 IGBTs 10 zeners, 7 ultrafast diodes
Overvoltage protection: 2x16 neon bulbs in series for E-C ( due to high frequency this bars become a real vu-meter!!! ) and 2x2x12V 5W zener for B-E
Tesladownunder, Mon Mar 27 2006, 12:46AM
Teslacoiler June 3 2005
Hi All!
This is my last coil:
Status of design: Prototype under development
Maximum streamers lenght: approx 25cm @ 140Vac input
UPDATE: 35cm on 180V by changing the inductor
Maximum spark and arks lenght: N/A ( IGBTs die at first spark! )
Maximum input voltage whithout damages: 140Vac ( my goal is 230Vac! )
Driver: pure sinusoidal, ZVS resonant oscillator based on ROYER circuitry
Mode: fullwawe only (halfwawe and CW modes will be added sooner or later)
UPDATE: others mode tested; fullwawe seems to be the best mode, strangely halfwawe give shorter streamers!
Tank capacitor: 150nF MMC ( MKP-HQ )
Primary coil: 4+4+4+4 turns of 2.5 sqmm PVC insulated cable wound in qudrifilar over a 21cm coilform
Secondary coil: 2720 turns of 0,18mm magnet wire over a 16cm coilform, 49cm winding height.
Resonant frequency: 94KHz
Damaged silicon: 6 IGBTs, 8 zener diodes, 6 ultrafast diodes (yet!)
UPDATE: 8 IGBTs 10 zeners, 7 ultrafast diodes
Overvoltage protection: 2x16 neon bulbs in series for E-C ( due to high frequency this bars become a real vu-meter!!! ) and 2x2x12V 5W zener for B-E
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:48AM
Teslacoiler June 3 2005
Another pic of my SSTC_royer:
Solid state coils are amazing, but vacuum tubes ones are better!
Tesladownunder, Mon Mar 27 2006, 12:48AM
Teslacoiler June 3 2005
Another pic of my SSTC_royer:
Solid state coils are amazing, but vacuum tubes ones are better!
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:49AM
colin99 June 26 2005
Here is a picture of my SGTC with an extra vertical helix primary for SSTC mode of operation. The secondary is 4.25" by 22". I'm using Dans PlasmaSonic II board as the driver and my mmc bank (for SGTC) connected in series with the SSTC primary to increase the current. The primary circuit is near resonant and secondary is resonant. I have a 120 to 240 volt stepup transformer feeding the halfwave rectified inputs to the bridge. Right now it blows the mains circuit breaker after 10 seconds of run time.
Shaun
The second photo is a spark picture of it running this configuration. The sparks are two to 2 1/2 feet long. enjoy!
Tesladownunder, Mon Mar 27 2006, 12:49AM
colin99 June 26 2005
Here is a picture of my SGTC with an extra vertical helix primary for SSTC mode of operation. The secondary is 4.25" by 22". I'm using Dans PlasmaSonic II board as the driver and my mmc bank (for SGTC) connected in series with the SSTC primary to increase the current. The primary circuit is near resonant and secondary is resonant. I have a 120 to 240 volt stepup transformer feeding the halfwave rectified inputs to the bridge. Right now it blows the mains circuit breaker after 10 seconds of run time.
Shaun
The second photo is a spark picture of it running this configuration. The sparks are two to 2 1/2 feet long. enjoy!
Re: ** Add your Tesla coil here **
Tesladownunder, Mon Mar 27 2006, 12:52AM
colin99 June 26 2005
Tesladownunder, Mon Mar 27 2006, 12:52AM
colin99 June 26 2005
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:11PM
Connor McSteve June 27 2005
"Mjöllnir" my mini DRSSTC. It has a 5.5" x 13" resonator, 4.5" x 13" toroid, 10 turn primary, 0.05uF 10kV tank capacitor, and full bridge of 40N60 miniblocks. The whole thing is controlled by my Mk2 PLL driver with primary current feedback and runs at 220kHz.
Best spark output so far is just under 3ft. The sparks in the picture are just over 2ft. The driver can supply lots more power but if I turn it up any more it just flashes over between primary and secondary. Working on some mods to try and fix that..
Tesladownunder, Tue Mar 28 2006, 05:11PM
Connor McSteve June 27 2005
"Mjöllnir" my mini DRSSTC. It has a 5.5" x 13" resonator, 4.5" x 13" toroid, 10 turn primary, 0.05uF 10kV tank capacitor, and full bridge of 40N60 miniblocks. The whole thing is controlled by my Mk2 PLL driver with primary current feedback and runs at 220kHz.
Best spark output so far is just under 3ft. The sparks in the picture are just over 2ft. The driver can supply lots more power but if I turn it up any more it just flashes over between primary and secondary. Working on some mods to try and fix that..
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:13PM
Reaching June 29 2005
MHRDRSSTC2
Specs:
Halfbridge with irfp460´s , 165nF 1,6kV MMC , 11x22cm secondary, 0,2mm wire. .Primary : 9 turns with an inner diameter of 12cm. Dual 4046 PLL Driver circuit with Primary Current feedback (1:60). Halfwave Rectified Bridge power Supply. Toroid: 6x20cm with Breakout point. Resonant: 186Khz, Interrupter Fres: 15Hz . Sparklenght around 35cm, to a grounded Target nearly 45cm.
Tesladownunder, Tue Mar 28 2006, 05:13PM
Reaching June 29 2005
MHRDRSSTC2
Specs:
Halfbridge with irfp460´s , 165nF 1,6kV MMC , 11x22cm secondary, 0,2mm wire. .Primary : 9 turns with an inner diameter of 12cm. Dual 4046 PLL Driver circuit with Primary Current feedback (1:60). Halfwave Rectified Bridge power Supply. Toroid: 6x20cm with Breakout point. Resonant: 186Khz, Interrupter Fres: 15Hz . Sparklenght around 35cm, to a grounded Target nearly 45cm.
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:15PM
d73 July 9 2005
This is my first SGTC. I've previously made an SSTC. The specs are:
4 MOT Stack Power Supply (no oil).
Inductive Ballast (10A limit current draw)
120uF PFC.
Secondary Diameter 110mm (1000 turns of 0.55mm wire).
Asynchronous Rotary Spark Gap.
80nF MMC Tank Capacitor (previously bottle caps).
I'm still experimenting with the tuning, but so far I get good results with 2 turns on the primary. I've literally just started to get the first streamers tonight. More images and info can be found on my website ().
Tesladownunder, Tue Mar 28 2006, 05:15PM
d73 July 9 2005
This is my first SGTC. I've previously made an SSTC. The specs are:
4 MOT Stack Power Supply (no oil).
Inductive Ballast (10A limit current draw)
120uF PFC.
Secondary Diameter 110mm (1000 turns of 0.55mm wire).
Asynchronous Rotary Spark Gap.
80nF MMC Tank Capacitor (previously bottle caps).
I'm still experimenting with the tuning, but so far I get good results with 2 turns on the primary. I've literally just started to get the first streamers tonight. More images and info can be found on my website (
).
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:16PM
RSmith July 13 2005
This vacuum tube Tesla coil uses three 811A triodes powered by a small microwave oven transformer.
The secondary was wound with #24 gauge wire on a 6" diameter PVC pipe. You might have noticed that the primary and secondary coils are way oversized for a Tesla coil of this type. I wasn't concerned about portability when I built it.
All the primary components and wiring are enclosed in Plexiglas (safety for the rug rats).
I chose 811A tubes for this project because they are cheep, easy to find, and simple to hook up in a circuit. To see better photos of this coil and a circuit diagram, use this link.
Tesladownunder, Tue Mar 28 2006, 05:16PM
RSmith July 13 2005
This vacuum tube Tesla coil uses three 811A triodes powered by a small microwave oven transformer.
The secondary was wound with #24 gauge wire on a 6" diameter PVC pipe. You might have noticed that the primary and secondary coils are way oversized for a Tesla coil of this type. I wasn't concerned about portability when I built it.
All the primary components and wiring are enclosed in Plexiglas (safety for the rug rats).
I chose 811A tubes for this project because they are cheep, easy to find, and simple to hook up in a circuit. To see better photos of this coil and a circuit diagram, use this link.
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:18PM
RSmith July 13 2005
Tube coil running near several light bulbs
Tesladownunder, Tue Mar 28 2006, 05:18PM
RSmith July 13 2005
Tube coil running near several light bulbs
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:19PM
Reaching July 26 2005
My newest SGTC Work. Midi 3
Transformer: 7,5kV 50mA NST
Primary: 8 Turns (connected at 7,7turns)
Secondary (7,5cm Diameter 37cm in height, wound with 0,3mm Wire)
Spark Gap: Multi Gap (6 Elektrodes) with 90mm Pc Fan
Toroid : 30x10cm
Maximum Sparklenght: around 70cm or nearly 28"
For more Info(pics etc), visit my Website
Tesladownunder, Tue Mar 28 2006, 05:19PM
Reaching July 26 2005
My newest SGTC Work. Midi 3
Transformer: 7,5kV 50mA NST
Primary: 8 Turns (connected at 7,7turns)
Secondary (7,5cm Diameter 37cm in height, wound with 0,3mm Wire)
Spark Gap: Multi Gap (6 Elektrodes) with 90mm Pc Fan
Toroid : 30x10cm
Maximum Sparklenght: around 70cm or nearly 28"
For more Info(pics etc), visit my Website
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:21PM
Connor Mc Steve July 19 2005
The Turbo Triodal Tesla-2
This is my old Tesla-2 spark gap coil, that I decided to max out with some help from Alan Sharp and Richie Burnett.
We added an extra 25nF @ 20kV of commercial pulse caps in parallel with the existing 12.5nF cap, and installed Alan's huge "triodal" topload made from multiple salad bowls from Woolworths and Ikea.
We then turned the power supply and gap motor up as far as they would go and watched the fun :-/ We shut it down when it started striking the tank capacitors as we were worried about damaging them.
The single MOT, multiplier stack and charging chokes seemed fine even though they were designed for 1kW and probably were supplying nearer 3kW. The gap electrodes melted, the gap motor bearings failed, the secondary was burnt by racing arcs, and we blew several 5 amp fuses.
All good fun
Tesladownunder, Tue Mar 28 2006, 05:21PM
Connor Mc Steve July 19 2005
The Turbo Triodal Tesla-2
This is my old Tesla-2 spark gap coil, that I decided to max out with some help from Alan Sharp and Richie Burnett.
We added an extra 25nF @ 20kV of commercial pulse caps in parallel with the existing 12.5nF cap, and installed Alan's huge "triodal" topload made from multiple salad bowls from Woolworths and Ikea.
We then turned the power supply and gap motor up as far as they would go and watched the fun :-/ We shut it down when it started striking the tank capacitors as we were worried about damaging them.
The single MOT, multiplier stack and charging chokes seemed fine even though they were designed for 1kW and probably were supplying nearer 3kW. The gap electrodes melted, the gap motor bearings failed, the secondary was burnt by racing arcs, and we blew several 5 amp fuses.
All good fun
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:23PM
mattrg July 25 2005
More of the coil in view...Specs can be found in the thread under projects...
Tesladownunder, Tue Mar 28 2006, 05:23PM
mattrg July 25 2005
More of the coil in view...Specs can be found in the thread under projects...
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:25PM
mattrg July 25 2005
El gordo
Tesladownunder, Tue Mar 28 2006, 05:25PM
mattrg July 25 2005
El gordo
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:26PM
sf8389 Aug 05 2005
Thes is a pic of my coil.
Tesladownunder, Tue Mar 28 2006, 05:26PM
sf8389 Aug 05 2005
Thes is a pic of my coil.
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:28PM
sf8389 Aug 05 2005
This is it running about 20" arcs to a grounded object it maxes out about 25" streamers.
Power: 2 12kv 30ma modified with 5 shunts removed
?100ma?
Capacitor: .02uF rolled polyethylene
Toploads: both 3" minor diameter one major 10" and 15"
Secondary:4" diameter 643 turns ran out of wire so two different wire sizes 19 and 22 ga 30" tall
Primary:1/4 cu tube about 7 turns tuned
Tesladownunder, Tue Mar 28 2006, 05:28PM
sf8389 Aug 05 2005
This is it running about 20" arcs to a grounded object it maxes out about 25" streamers.
Power: 2 12kv 30ma modified with 5 shunts removed
?100ma?
Capacitor: .02uF rolled polyethylene
Toploads: both 3" minor diameter one major 10" and 15"
Secondary:4" diameter 643 turns ran out of wire so two different wire sizes 19 and 22 ga 30" tall
Primary:1/4 cu tube about 7 turns tuned
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:29PM
philer Aug 05 2005
My second working Tesla Coil (But its a bit out of tune)
Technical Data:
Secondary: h: 64 cm
d: 16 cm
wire: 0.42 mm
Primary: d1: 24 cm
angle: ~5°
w: cu 8mm
n: 12 turns
Toroid: d1: 64 cm
d2: 16cm
Cap: 50nF mmc (wima fkp-1)
PSU: 4-Mot-Stack (without oil) ballasted with mots.
power draw: unknown (no ampmeter)
Sparklenght: about 5 feet
Tesladownunder, Tue Mar 28 2006, 05:29PM
philer Aug 05 2005
My second working Tesla Coil (But its a bit out of tune)
Technical Data:
Secondary: h: 64 cm
d: 16 cm
wire: 0.42 mm
Primary: d1: 24 cm
angle: ~5°
w: cu 8mm
n: 12 turns
Toroid: d1: 64 cm
d2: 16cm
Cap: 50nF mmc (wima fkp-1)
PSU: 4-Mot-Stack (without oil) ballasted with mots.
power draw: unknown (no ampmeter)
Sparklenght: about 5 feet
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:31PM
Ronald Aug 09 2005
Okay whit many thanks to tc down under i am able to show some pic's
This is the first coil i've build
Its a litle big but HEY youve gotta start somewhere...
Sec: 250mm diam
1850mm 1600 turns long
1mm wire
80 khz
Running on 4 Motstack whit no limits at all when the wiring smoke's its time to stop
Stil trying to get the cde caps so if someone is able to get me 40 caps for a resonable prise please let me now.
Tesladownunder, Tue Mar 28 2006, 05:31PM
Ronald Aug 09 2005
Okay whit many thanks to tc down under i am able to show some pic's
This is the first coil i've build
Its a litle big but HEY youve gotta start somewhere...
Sec: 250mm diam
1850mm 1600 turns long
1mm wire
80 khz
Running on 4 Motstack whit no limits at all when the wiring smoke's its time to stop
Stil trying to get the cde caps so if someone is able to get me 40 caps for a resonable prise please let me now.
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:36PM
Ronald Aug 09 2005
Then my next coil
This is the vttc type
I've build this coil to test the GU-21b tube and to test my skils in building a vttc.
This is a coil whit far to litle turns on the sec.
A to much power on the prim.
This picture shows the testing stand...
The Gu-21b can take as much as 10 Kw
It runs on a filament of 8.5 volts at 150amp. rms
Tesladownunder, Tue Mar 28 2006, 05:36PM
Ronald Aug 09 2005
Then my next coil
This is the vttc type
I've build this coil to test the GU-21b tube and to test my skils in building a vttc.
This is a coil whit far to litle turns on the sec.
A to much power on the prim.
This picture shows the testing stand...
The Gu-21b can take as much as 10 Kw
It runs on a filament of 8.5 volts at 150amp. rms
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:37PM
Ronald Aug 09 2005
Showing the small coil running at 1.2Kw on the filament and aprox 2Kw in the coil
Tesladownunder, Tue Mar 28 2006, 05:37PM
Ronald Aug 09 2005
Showing the small coil running at 1.2Kw on the filament and aprox 2Kw in the coil
Re: ** Add your Tesla coil here **
Tesladownunder, Tue Mar 28 2006, 05:38PM
Tesladownunder Aug 23 2005
This is the University of Western Australia TC which dates back 40 years. Made in Germany according to the nameplate. Apparently runs at 1Mhz but lots of problems with the Leyden jar caps. Not really sure of the performance or if it is working now. They want a new one so I put my hand up. Not sure if the wiring forms the best theoretical transmission line at 1mHz
Tesladownunder, Tue Mar 28 2006, 05:38PM
Tesladownunder Aug 23 2005
This is the University of Western Australia TC which dates back 40 years. Made in Germany according to the nameplate. Apparently runs at 1Mhz but lots of problems with the Leyden jar caps. Not really sure of the performance or if it is working now. They want a new one so I put my hand up. Not sure if the wiring forms the best theoretical transmission line at 1mHz
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:04PM
teslacoiler Aug 27 2005
Hi All!
This is neither my last coil nor my best one, is only the strangest configuration i use during the development of my "VTTCBIG" ( destroyed for scraping components for building my "VTTCBIG2°" and reborned as "Progetto Fenice" )
basically i made a vacuum tube coil with the standard schematic but i had some insulation problem between primary and secondary ( see this pic for details )
so i decided to modify the coupling between coils and made a tesla magnifier. For the first time i use a separate secondary wound on a 25cm coilform magnetically coupled to primary coil, the base of this secondary was connected to ground and the end of it was connected to the base of tertiary coil with this configuration i solve the insulation's problems but i never get impressive outputs ( approx 10cm of streamers ), so i decide to made another change
i added many other turns ( and many other taps, 1 each turn, a boring procedure!!!! ) on my primary coil to made a sort of autotransformer, than i connected the base of the coil at the plate supply and at the tank capacitor, i made a intermediate connection for the plate and the tank capacitor and finally i connected the base of tertiary coil at the end of the primary coil.
With this circuitry the output was now quite well, the streamers was similar to any other VTTC but the sparks and arcs to ground was really hot and impressive, no way to doubt it since the output of the coil was in fact connected to the plate voltage!!!!!
of course, in this particular configuration the coil IS EXTREMELY DANGEROUS!, LETHAL VOLTAGES AND CURRENTS ARE PRESENT AT THE TOP OF DISCHARGE TERMINAL SO STREAMERS MUST NOT BE TOUCHED!!!!!!!!!!!
I decided to solve this new problem by using a big 1nF 14kVrms ceramic capacitor inserted between primary autotransformer and tertiary coil, the output of the coil was now pretty safe but not entirely safe so is preferably to never touch the streamers again.
This is the final result:
After this experience i made a new secondary coil, i rewired the circuit as a standard VTTC and i tried to reuse the taps on primary coil as impedance matching transformer for the plate circuit, in fact the internal impedance of the tube is about twice the impedance of the loaded LC tank circuit and this impedance mismatching is adversely affect the performance of the coil. my VTTCBIG2 was finally borned, but this is an another story!
Tesladownunder, Sun Apr 16 2006, 05:04PM
teslacoiler Aug 27 2005
Hi All!
This is neither my last coil nor my best one, is only the strangest configuration i use during the development of my "VTTCBIG" ( destroyed for scraping components for building my "VTTCBIG2°" and reborned as "Progetto Fenice" )
basically i made a vacuum tube coil with the standard schematic but i had some insulation problem between primary and secondary ( see this pic for details
) so i decided to modify the coupling between coils and made a tesla magnifier. For the first time i use a separate secondary wound on a 25cm coilform magnetically coupled to primary coil, the base of this secondary was connected to ground and the end of it was connected to the base of tertiary coil with this configuration i solve the insulation's problems but i never get impressive outputs ( approx 10cm of streamers ), so i decide to made another change
i added many other turns ( and many other taps, 1 each turn, a boring procedure!!!! ) on my primary coil to made a sort of autotransformer, than i connected the base of the coil at the plate supply and at the tank capacitor, i made a intermediate connection for the plate and the tank capacitor and finally i connected the base of tertiary coil at the end of the primary coil.
With this circuitry the output was now quite well, the streamers was similar to any other VTTC but the sparks and arcs to ground was really hot and impressive, no way to doubt it since the output of the coil was in fact connected to the plate voltage!!!!!
of course, in this particular configuration the coil IS EXTREMELY DANGEROUS!, LETHAL VOLTAGES AND CURRENTS ARE PRESENT AT THE TOP OF DISCHARGE TERMINAL SO STREAMERS MUST NOT BE TOUCHED!!!!!!!!!!!
I decided to solve this new problem by using a big 1nF 14kVrms ceramic capacitor inserted between primary autotransformer and tertiary coil, the output of the coil was now pretty safe but not entirely safe so is preferably to never touch the streamers again.
This is the final result:
After this experience i made a new secondary coil, i rewired the circuit as a standard VTTC and i tried to reuse the taps on primary coil as impedance matching transformer for the plate circuit, in fact the internal impedance of the tube is about twice the impedance of the loaded LC tank circuit and this impedance mismatching is adversely affect the performance of the coil. my VTTCBIG2 was finally borned, but this is an another story!
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:06PM
NickBernsden August 30 2005
Here is the third and most recent tesla coil I have built.
It is a DC resonant charging rotary spark gap tesla coil.
It runs at about 2,000W and has produced a 5 foot discharge, although strikes are more often between 3 and 4 feet.
Power supply: 2 MOTs wired in series, center tap grounded, in oil.
Voltage Doubler: A two 35kV diode-sticks and 16 microwave oven capacitors to produce a pretty steady 12kV DC output.
Charging reactor: 4 MOT secondaries in series, I-laminations removed from cores to introduce an airgap.
D-Qing diode: 8 microwave oven diodes in series.
Spark Gap: <480 BPS rotary made from a 3600 rmp oven-fan motor. 8 spinning, 1 stationary electrode.
Capacitor: Cornel-Dublier MMC-- 2 strings of 15 caps for 30kV, 20nF.
Primary Coil: 16 turns of .25" refrigeration tubing wound on a 15 degree inverse-cone.
Secondary Coil: 25" tall, 4" diameter sch 80 PVC coilform. Winding is awg 22 over 24" for 1050 turns.
Torroid: Aluminum drier duct, 26" major diameter, 5" minor diameter.
You can see more about this tesla coil at
You can also see my other coils, along with other fun things like trebuchets, potato guns, robots, and jacob's ladders at
Below is a 2 second digital camera exposure of my DC coil running in my garage.
Tesladownunder, Sun Apr 16 2006, 05:06PM
NickBernsden August 30 2005
Here is the third and most recent tesla coil I have built.
It is a DC resonant charging rotary spark gap tesla coil.
It runs at about 2,000W and has produced a 5 foot discharge, although strikes are more often between 3 and 4 feet.
Power supply: 2 MOTs wired in series, center tap grounded, in oil.
Voltage Doubler: A two 35kV diode-sticks and 16 microwave oven capacitors to produce a pretty steady 12kV DC output.
Charging reactor: 4 MOT secondaries in series, I-laminations removed from cores to introduce an airgap.
D-Qing diode: 8 microwave oven diodes in series.
Spark Gap: <480 BPS rotary made from a 3600 rmp oven-fan motor. 8 spinning, 1 stationary electrode.
Capacitor: Cornel-Dublier MMC-- 2 strings of 15 caps for 30kV, 20nF.
Primary Coil: 16 turns of .25" refrigeration tubing wound on a 15 degree inverse-cone.
Secondary Coil: 25" tall, 4" diameter sch 80 PVC coilform. Winding is awg 22 over 24" for 1050 turns.
Torroid: Aluminum drier duct, 26" major diameter, 5" minor diameter.
You can see more about this tesla coil at
You can also see my other coils, along with other fun things like trebuchets, potato guns, robots, and jacob's ladders at
Below is a 2 second digital camera exposure of my DC coil running in my garage.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:08PM
NickBerndsen Aug 30 2005
This one is the second coil I built, during my junior and senior years in high school.
It is a standard AC rotarty spark gap tesla coil.
It is designed to run at about 6,000W (although I never pushed it past 4,000W). From this power, it produced 6' to 8' sparks.
Power supply: 10kW, 14.4kV distribution transformer.
Ballast: Sliding inductive ballast built from welding rods.
Capacitor: MMC 30kV, 20nF
Spark Gap: 480 BPS rotary from a 1800 rmp tredmill motor. 8 spinning and 2 stationary electrodes.
Primary: 100' of 3/8" copper refrigeration tubing. Flat spiral, 16 or so turns.
Secondary: 1100 turns of AWG 18 wound on a 8" by 40" sonotube (cardboard) coilform heavily coated in polyethylene.
Torroid: 2 aluminum drier duct torroids and another made out of corrugated drain pipe covered in Aluminum tape. All statcked on top of eachother.
Sadly, I didn't put a lot of (any) filters on this, and I think the coil killed my pig on the coil's first light. All I have are these screenshots from a video I took right before it fried. This was before I could accurately tap the primary or crank it up to full power.
You can see more about this, and my other coils at
Below is a screenshot of an arc to a ladder in my backyard.
Tesladownunder, Sun Apr 16 2006, 05:08PM
NickBerndsen Aug 30 2005
This one is the second coil I built, during my junior and senior years in high school.
It is a standard AC rotarty spark gap tesla coil.
It is designed to run at about 6,000W (although I never pushed it past 4,000W). From this power, it produced 6' to 8' sparks.
Power supply: 10kW, 14.4kV distribution transformer.
Ballast: Sliding inductive ballast built from welding rods.
Capacitor: MMC 30kV, 20nF
Spark Gap: 480 BPS rotary from a 1800 rmp tredmill motor. 8 spinning and 2 stationary electrodes.
Primary: 100' of 3/8" copper refrigeration tubing. Flat spiral, 16 or so turns.
Secondary: 1100 turns of AWG 18 wound on a 8" by 40" sonotube (cardboard) coilform heavily coated in polyethylene.
Torroid: 2 aluminum drier duct torroids and another made out of corrugated drain pipe covered in Aluminum tape. All statcked on top of eachother.
Sadly, I didn't put a lot of (any) filters on this, and I think the coil killed my pig on the coil's first light. All I have are these screenshots from a video I took right before it fried. This was before I could accurately tap the primary or crank it up to full power.
You can see more about this, and my other coils at
Below is a screenshot of an arc to a ladder in my backyard.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:10PM
Wirenut Sept 11 2005
This my second coil.
Power Supply: Unballasted MOT 6 pack, final 2 MOT’s under oil.
Primary: (Used G. Hunter’s design, but I was too impatient to cut tapping slots so I simply tap from the top) 14.8 turns .25†copper tubing spaced .25â€, 8.5" ID on a 24"x3/4" plywood disk.
Secondary: 6.25†O.D. pvc wound for 28.1†w/ 24awg ~1300t 201kHz (calculated unloaded)
Cap: Several large paralled home-made rolled PE under oil ~.1uF.
Gap: 733 BPS ARSG
Toroid: 7x24 & 3X20 (56.7pF calculated capacitance, brings Fres to 84kHz)dryer duct covered w/al tape.
Max. sparklength: 72" with breakout point to grounded target, Gap full blast, pri. tapped @ 5
Planned upgrades: .1uF MMC, SRSG, *X* spun toroid
Tesladownunder, Sun Apr 16 2006, 05:10PM
Wirenut Sept 11 2005
This my second coil.
Power Supply: Unballasted MOT 6 pack, final 2 MOT’s under oil.
Primary: (Used G. Hunter’s design, but I was too impatient to cut tapping slots so I simply tap from the top) 14.8 turns .25†copper tubing spaced .25â€, 8.5" ID on a 24"x3/4" plywood disk.
Secondary: 6.25†O.D. pvc wound for 28.1†w/ 24awg ~1300t 201kHz (calculated unloaded)
Cap: Several large paralled home-made rolled PE under oil ~.1uF.
Gap: 733 BPS ARSG
Toroid: 7x24 & 3X20 (56.7pF calculated capacitance, brings Fres to 84kHz)dryer duct covered w/al tape.
Max. sparklength: 72" with breakout point to grounded target, Gap full blast, pri. tapped @ 5
Planned upgrades: .1uF MMC, SRSG, *X* spun toroid
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:12PM
Wirenut Sept 11 2005
It’s hard to take good pictures with a cheap digital camera while manning the coil controls alone. I Have video (Pics soon) of 72" direct strikes to a grounded target with bigger toroid & breakout point
Tesladownunder, Sun Apr 16 2006, 05:12PM
Wirenut Sept 11 2005
It’s hard to take good pictures with a cheap digital camera while manning the coil controls alone. I Have video (Pics soon) of 72" direct strikes to a grounded target with bigger toroid & breakout point
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:13PM
Reaching Sept 11 2005
DRSSTC1
Resonant Frequency: 150khz
Primary: 10 turns of 6mm² copper wire,on 16cm form, attached at 6 turns
Secondary: 11x45cm PP Tube wound with 0,3mm enamelled wire
Toroid: one small 4x20 and a big 8x30cm, alu coated
Driver: Steve Wards DRSSTC1 Driver
Fullbridge: 4x G4PC5OUD Igbts
Sparklenght: nearly 1,5meter or 5´ (seen in the Video)
Heres the new Video of the running coil,
Tesladownunder, Sun Apr 16 2006, 05:13PM
Reaching Sept 11 2005
DRSSTC1
Resonant Frequency: 150khz
Primary: 10 turns of 6mm² copper wire,on 16cm form, attached at 6 turns
Secondary: 11x45cm PP Tube wound with 0,3mm enamelled wire
Toroid: one small 4x20 and a big 8x30cm, alu coated
Driver: Steve Wards DRSSTC1 Driver
Fullbridge: 4x G4PC5OUD Igbts
Sparklenght: nearly 1,5meter or 5´ (seen in the Video)
Heres the new Video of the running coil,
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:14PM
Avalanche Sept 17 2005
I'll add mine, first coil and by no means the last.
It's only a tiny SSTC, self tuning, I think it is running at about 1Mhz here, and lighting tubes from only a 24vdc supply and a single MOSFET rated for 50V. I actually didn't expect it to work, I just noticed the corona discharge whilst attempting to determine the resonant frequency of the coil on the scope, so a working coil was a bonus.
Tesladownunder, Sun Apr 16 2006, 05:14PM
Avalanche Sept 17 2005
I'll add mine, first coil and by no means the last.
It's only a tiny SSTC, self tuning, I think it is running at about 1Mhz here, and lighting tubes from only a 24vdc supply and a single MOSFET rated for 50V. I actually didn't expect it to work, I just noticed the corona discharge whilst attempting to determine the resonant frequency of the coil on the scope, so a working coil was a bonus.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:16PM
Akota Sept 17 2005
My first coil. Started this about 2 weeks ago. Pretty typical design using 4 MOT stack, .03uF Maxwell 35KV cap. I know in the pic the strike rail is below the primary, but it didn't start that way. My primary was originaly flat but because of low output from being mounted to wood I added some plastic spacers and it pulled into an inverted cone. Anyway, I am getting around 3 foot streamers now. There are photos and video on my website under the photon section. I am reworking the spark gap. Right now I am using a tungsten single static gap. It gives low output to start, warms up and output grows, then overheats, stops quenching and output drops. Also, everyone asks what the lights are for. I am using them as ballast for the time being.
Tesladownunder, Sun Apr 16 2006, 05:16PM
Akota Sept 17 2005
My first coil. Started this about 2 weeks ago. Pretty typical design using 4 MOT stack, .03uF Maxwell 35KV cap. I know in the pic the strike rail is below the primary, but it didn't start that way. My primary was originaly flat but because of low output from being mounted to wood I added some plastic spacers and it pulled into an inverted cone. Anyway, I am getting around 3 foot streamers now. There are photos and video on my website
under the photon section. I am reworking the spark gap. Right now I am using a tungsten single static gap. It gives low output to start, warms up and output grows, then overheats, stops quenching and output drops. Also, everyone asks what the lights are for. I am using them as ballast for the time being.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:18PM
DBH Sept 28 2005
I recently rebuilt my small TC, so I thought I'd post some pics of it.
Improvements include:
Stronger, lighter and nicer looking frame.
Shorter wiring.
Re-sealed secondary.
New tungsten spark gap.
Here are a couple of pics:
And here's a short video of it running at lower power levels (didn't want to blow it up so soon after the rebuild )
Video.WMV
Duncan.
Tesladownunder, Sun Apr 16 2006, 05:18PM
DBH Sept 28 2005
I recently rebuilt my small TC, so I thought I'd post some pics of it.
Improvements include:
Stronger, lighter and nicer looking frame.
Shorter wiring.
Re-sealed secondary.
New tungsten spark gap.
Here are a couple of pics:
And here's a short video of it running at lower power levels (didn't want to blow it up so soon after the rebuild )
Video.WMVDuncan.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:20PM
RayeR Oct 7 2005
This is my first TC secondary from year 2001,
formerly designed to use in SGTC but after some years I redesigned parimary to use as VTTC driven by GU-81M.
Secondary: 4 x 25 cm, 900 turns by 0.28 mm wire
Primary: 11 x 8.3 cm, 18,3 turns by 2.26 mm wire
Feedback: 11 x 2.1 cm, 20 turns (taps at 10 and 15) by 0.4 mm wire
Tank cap: 0,76nF / 11kV (3 x MICA)
f0 = 1,26 MHz, k = 0.235
more at:
Tesladownunder, Sun Apr 16 2006, 05:20PM
RayeR Oct 7 2005
This is my first TC secondary from year 2001,
formerly designed to use in SGTC but after some years I redesigned parimary to use as VTTC driven by GU-81M.
Secondary: 4 x 25 cm, 900 turns by 0.28 mm wire
Primary: 11 x 8.3 cm, 18,3 turns by 2.26 mm wire
Feedback: 11 x 2.1 cm, 20 turns (taps at 10 and 15) by 0.4 mm wire
Tank cap: 0,76nF / 11kV (3 x MICA)
f0 = 1,26 MHz, k = 0.235
more at:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:26PM
RayeR Oct 7 2005
Here's my 2nd TC - miniTC (2002) inspired by Sam Barros wounded on vitamine tube. It was designed as SGTC powered by small NST. My first primary design was wrong coz I got many flahovers between primary and secondary which burned my secondary
So I had to start all again, now redesigned with flat-spiral primary and no flashing between pri-sec now.
Secondary: 2.7 x 8.2 cm, 500 turns by 0.16 mm wire
Primary: 5.1->8.3 cm, 4.6 turns by 1.75 mm wire
Tankcap: 2.2nF / 15kVAC
NST: 5kV / 120 VA
SG: static, divided, 5 Cu pipes
f0 = 2.47 MHz, k = 0.142
Tesladownunder, Sun Apr 16 2006, 05:26PM
RayeR Oct 7 2005
Here's my 2nd TC - miniTC (2002) inspired by Sam Barros wounded on vitamine tube. It was designed as SGTC powered by small NST. My first primary design was wrong coz I got many flahovers between primary and secondary which burned my secondary
So I had to start all again, now redesigned with flat-spiral primary and no flashing between pri-sec now.
Secondary: 2.7 x 8.2 cm, 500 turns by 0.16 mm wire
Primary: 5.1->8.3 cm, 4.6 turns by 1.75 mm wire
Tankcap: 2.2nF / 15kVAC
NST: 5kV / 120 VA
SG: static, divided, 5 Cu pipes
f0 = 2.47 MHz, k = 0.142
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:27PM
RayeR Oct 7 2005
This is my 3rd TC from year 2003, little bit larger coz I plan it for SSTC. It was driven by MOSFET (IRFP460) half-bridge, powered by 1-way rectified mains, filtered by choke, thyristor preregulator and optional 220/390/(220+390)uF filter cap. I use DRSSTC mode because in classic SSTC the result was poor. Later I replaced popping MOSFETs by fast fairchild IGBTs FGH50N6S2D which works fine. Tank cap. is connected in serial with primary coil which decrease impedance to driver and increase voltage on primary side. I can get up to 40cm sparks at about 900W of input power. I'm quite satiftied with this TC, except it can't run too long coz sec. wire is overheating.
Secondary: 6.3 x 41 cm, 2000 turns by 0.2 mm wire
Primary: 11.2 x 8 cm, 13.75 turns by 2.0 mm wire
Feedback: 11.2 x 1.7 cm, 16 turns (2, 8 taps) - unused with SSTC
Tank cap.: 12.3 nF / 4.5kV MMC (8 strings parellel, 3 caps./string)
f0 = 335 kHz, k = 0,36
Tesladownunder, Sun Apr 16 2006, 05:27PM
RayeR Oct 7 2005
This is my 3rd TC from year 2003, little bit larger coz I plan it for SSTC. It was driven by MOSFET (IRFP460) half-bridge, powered by 1-way rectified mains, filtered by choke, thyristor preregulator and optional 220/390/(220+390)uF filter cap. I use DRSSTC mode because in classic SSTC the result was poor. Later I replaced popping MOSFETs by fast fairchild IGBTs FGH50N6S2D which works fine. Tank cap. is connected in serial with primary coil which decrease impedance to driver and increase voltage on primary side. I can get up to 40cm sparks at about 900W of input power. I'm quite satiftied with this TC, except it can't run too long coz sec. wire is overheating.
Secondary: 6.3 x 41 cm, 2000 turns by 0.2 mm wire
Primary: 11.2 x 8 cm, 13.75 turns by 2.0 mm wire
Feedback: 11.2 x 1.7 cm, 16 turns (2, 8 taps) - unused with SSTC
Tank cap.: 12.3 nF / 4.5kV MMC (8 strings parellel, 3 caps./string)
f0 = 335 kHz, k = 0,36
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:29PM
RayeR Oct 7 2005
When somebody started "the world smallest SSTC" thread here I also tried
to make something small. It's not the smallest one but easy portable
and still powerfull. The design is not completted yet, I have to build
some controll generator/PLL/feedback circuit for driving halfbridge.
Secondary: 2.1 x 3.1 cm, 470 turns by 0.066 mm wire
Primary: 3.6 x 1.6 cm, 4.8 turns by 2.2 mm wire
f0 = 2.6 MHz, k = 0,4
SSTC: halfbridge 2 x IRF640, UCC27321, UCC27322, GDT hf toroid with 12 turns, 1ohm gate resistors.
Tesladownunder, Sun Apr 16 2006, 05:29PM
RayeR Oct 7 2005
When somebody started "the world smallest SSTC" thread here I also tried
to make something small. It's not the smallest one but easy portable
and still powerfull. The design is not completted yet, I have to build
some controll generator/PLL/feedback circuit for driving halfbridge.
Secondary: 2.1 x 3.1 cm, 470 turns by 0.066 mm wire
Primary: 3.6 x 1.6 cm, 4.8 turns by 2.2 mm wire
f0 = 2.6 MHz, k = 0,4
SSTC: halfbridge 2 x IRF640, UCC27321, UCC27322, GDT hf toroid with 12 turns, 1ohm gate resistors.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:30PM
RayeR Oct 7 2005
Now going from extreme to extreme, I just started to make my biggest TC. I had to wound two times, in first time the wire break in 1/3 of sec. and had to start again but when I consumed all wire I saw that damned 1/3 is missing to finish the coil. So I bought new wire and started it all again. Now I have secondary completted and varnished, thinking about primary (wanna try VTTC and DRSSTC).
Secondary: 16 x 87 cm, 2450 turns by 0.35 mm wire
Primary: not yet, but for VTTC it seems to be f*king huge...
...to be continued (updated)
Tesladownunder, Sun Apr 16 2006, 05:30PM
RayeR Oct 7 2005
Now going from extreme to extreme, I just started to make my biggest TC. I had to wound two times, in first time the wire break in 1/3 of sec. and had to start again but when I consumed all wire I saw that damned 1/3 is missing to finish the coil. So I bought new wire and started it all again. Now I have secondary completted and varnished, thinking about primary (wanna try VTTC and DRSSTC).
Secondary: 16 x 87 cm, 2450 turns by 0.35 mm wire
Primary: not yet, but for VTTC it seems to be f*king huge...
...to be continued (updated)
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:32PM
Reaching Oct 28 2005
my vttc2 is finished.
Selfwound 1,46kV Transformer to power the gu50 Tube (i know, the tube is not spec´d to run at more than 1kV but who cares )
secondary: 5x10cm wound with 0,2mm Wire
Primary 12 Turns , Feedback 8 turns.
discharges, 4-5cm into air.
mmc: 1,1nF 4kV
power, ca 90 Watts
Tesladownunder, Sun Apr 16 2006, 05:32PM
Reaching Oct 28 2005
my vttc2 is finished.
Selfwound 1,46kV Transformer to power the gu50 Tube (i know, the tube is not spec´d to run at more than 1kV but who cares )
secondary: 5x10cm wound with 0,2mm Wire
Primary 12 Turns , Feedback 8 turns.
discharges, 4-5cm into air.
mmc: 1,1nF 4kV
power, ca 90 Watts
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:33PM
Steelwolf Oct 28 2005
My biggest coil so far
Specifications:
Sec: 11cm x 60cm
Prim: about 9 windings made of 10mm copper-tube , 5 in use
Tank.Cap: 55nF made of 3 strings with ECPOS-FKP caps
Toroid is made of a 1meter long and 10cm thick Alu-Ducting
Sparkgap: Made of 9 Copper tubes, but for best performance there are only 7 in use.
PSU: 4 MOTs unballasted, powerdraw is about 15A by 230V
Longest spark was 1,2meter
Tesladownunder, Sun Apr 16 2006, 05:33PM
Steelwolf Oct 28 2005
My biggest coil so far
Specifications:
Sec: 11cm x 60cm
Prim: about 9 windings made of 10mm copper-tube , 5 in use
Tank.Cap: 55nF made of 3 strings with ECPOS-FKP caps
Toroid is made of a 1meter long and 10cm thick Alu-Ducting
Sparkgap: Made of 9 Copper tubes, but for best performance there are only 7 in use.
PSU: 4 MOTs unballasted, powerdraw is about 15A by 230V
Longest spark was 1,2meter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:35PM
Steelwolf Oct 28 2005
Some sparks..
Tesladownunder, Sun Apr 16 2006, 05:35PM
Steelwolf Oct 28 2005
Some sparks..
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:37PM
Reaching Oct 16 2005
something small i build at the weekend.
Mini SSTC 2
The Mini SSTC 2 is a slightly improved version of my mini sstc1.
Secondary:11x22cm wound with 0,2mm , coated with alkyd (like epoxyd)
Primary: 8 Turns 6mm² 12 cm inner Diameter
Frequency: ca 220kHz
Bridge: Halfbridge of Irfp460´s
Driver: Simple 555 driver with adj, cap
Discharges: up to 25cm
i tried a round design and i think it looks fine. after the Weekend i want to build some fine chicken wire around it.
another one finished, no toasted mosfets
Tesladownunder, Sun Apr 16 2006, 05:37PM
Reaching Oct 16 2005
something small i build at the weekend.
Mini SSTC 2
The Mini SSTC 2 is a slightly improved version of my mini sstc1.
Secondary:11x22cm wound with 0,2mm , coated with alkyd (like epoxyd)
Primary: 8 Turns 6mm² 12 cm inner Diameter
Frequency: ca 220kHz
Bridge: Halfbridge of Irfp460´s
Driver: Simple 555 driver with adj, cap
Discharges: up to 25cm
i tried a round design and i think it looks fine. after the Weekend i want to build some fine chicken wire around it.
another one finished, no toasted mosfets
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:39PM
Reaching Oct 16 2005
a pic of the nearly finished coil, look neat
Tesladownunder, Sun Apr 16 2006, 05:39PM
Reaching Oct 16 2005
a pic of the nearly finished coil, look neat
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:41PM
WilliamN Oct 22 2005
Here is my PLL SSTC I documented in the projects section. Its all together and run great. Its a halfbridge of IRF740s being driven by a version of Steve Connor's PLL driver. Halfwave rectified mains input. Mosfets stay relativley cool and can be run for long periods.
Tesladownunder, Sun Apr 16 2006, 05:41PM
WilliamN Oct 22 2005
Here is my PLL SSTC I documented in the projects section. Its all together and run great. Its a halfbridge of IRF740s being driven by a version of Steve Connor's PLL driver. Halfwave rectified mains input. Mosfets stay relativley cool and can be run for long periods.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:43PM
Reaching Oct 27 2005
and a new one MINI SSTC 3
Frequency: 175khz
Primary: 14 Turns 2mm Copper wire
Secondary: 11x22 wound with 0,2mm enam. wire
Driver: Simple 555driver with adj Cap. Fullbridge of Irfp460s
Sparklenght: 35cm, up to 45cm
Tesladownunder, Sun Apr 16 2006, 05:43PM
Reaching Oct 27 2005
and a new one MINI SSTC 3
Frequency: 175khz
Primary: 14 Turns 2mm Copper wire
Secondary: 11x22 wound with 0,2mm enam. wire
Driver: Simple 555driver with adj Cap. Fullbridge of Irfp460s
Sparklenght: 35cm, up to 45cm
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:46PM
Part Scavenger Nov 20 2005
Well, I finally got it looking good and I figured it was time to post it in this thread. I never would have figured all this out by myself, so thanks all you HV guys! There's not a neater site on the net. Anyway, here it is.
Right now it has a 4.13"(inside diameter), 19" tall, very thin(1/16-1/8") PVC secondary, pre-sanded and wrapped with 1200T of 27 guage wire. Secondary was coated in several coats of polyurethane. The primary consists of .5" refridgeration tubing spaced .5" center to center. Primary to secondary spacing 1". Toroid capacity 20pF in pic shown. Srike rail from a drier drum made to order! The top was already polished and the sides were already painted! Toriod corrigated drain pipe covered in aluminum foil. 6 pack MOT supply with 7th as a ballast; all under oil. Shown here is a blast gap as I have not fixed my rotary yet. See website for movie of it running. 33.2nF? of bottle caps, the more I add the better it gets.
Here is the coil, and the coil running. The bright one is 2 second exposure ballasted, the darker is 1 second unballasted. Max length so far is 49" seen in the unballasted pic. Since I'm only allowed 2 pics, the other is on my website.
Just doing my part in replenishing the ozone layer...
-Part Scavenger
Tesladownunder, Sun Apr 16 2006, 05:46PM
Part Scavenger Nov 20 2005
Well, I finally got it looking good and I figured it was time to post it in this thread. I never would have figured all this out by myself, so thanks all you HV guys! There's not a neater site on the net. Anyway, here it is.
Right now it has a 4.13"(inside diameter), 19" tall, very thin(1/16-1/8") PVC secondary, pre-sanded and wrapped with 1200T of 27 guage wire. Secondary was coated in several coats of polyurethane. The primary consists of .5" refridgeration tubing spaced .5" center to center. Primary to secondary spacing 1". Toroid capacity 20pF in pic shown. Srike rail from a drier drum made to order! The top was already polished and the sides were already painted! Toriod corrigated drain pipe covered in aluminum foil. 6 pack MOT supply with 7th as a ballast; all under oil. Shown here is a blast gap as I have not fixed my rotary yet. See website for movie of it running. 33.2nF? of bottle caps, the more I add the better it gets.
Here is the coil, and the coil running. The bright one is 2 second exposure ballasted, the darker is 1 second unballasted. Max length so far is 49" seen in the unballasted pic. Since I'm only allowed 2 pics, the other is on my website.
Just doing my part in replenishing the ozone layer...
-Part Scavenger
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:50PM
c4r0 Nov22 2005
This is my first tesla coil. I built it 4 or 5 years ago (i was then only 14 years old and more stupid than i'm now ), photos made today. The capacitors are charged by ignition coil, discharges occurs a few times per sec. Secondary height is about 30cm, the longest sparks 15cm. When i was building this tesla coil i didn't know much about how it works and i didn't do any calculation I don't know how it can work so well
Tesladownunder, Sun Apr 16 2006, 05:50PM
c4r0 Nov22 2005
This is my first tesla coil. I built it 4 or 5 years ago (i was then only 14 years old and more stupid than i'm now ), photos made today. The capacitors are charged by ignition coil, discharges occurs a few times per sec. Secondary height is about 30cm, the longest sparks 15cm. When i was building this tesla coil i didn't know much about how it works and i didn't do any calculation I don't know how it can work so well
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:53PM
Plasmaniac Nov 27 2005
Here's my first tc. It's powered by a Flyback and has a 33nF 16kV tank cap and a 30cm secondary:
A sparkpic (note the new primary it looks much better and I dont have no more problems with primary strikes)
Helical primary: 30cm sparks, primary strikes, racing sparks
Flat primary: 25cm sparks, no problems
Tesladownunder, Sun Apr 16 2006, 05:53PM
Plasmaniac Nov 27 2005
Here's my first tc. It's powered by a Flyback and has a 33nF 16kV tank cap and a 30cm secondary:
A sparkpic (note the new primary it looks much better and I dont have no more problems with primary strikes)
Helical primary: 30cm sparks, primary strikes, racing sparks
Flat primary: 25cm sparks, no problems
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 05:55PM
Avalanche Nov 30 2005
This is my 3rd Tesla Coil, constructed in 2 days
fRes = 800Khz with (small) topload
Primary = 9T
Secondary = Approx 600-700T AWG35(?) wire (from old transformer)
Secondary Winding length = 3.5"
Driver = Steve C's PLL
Power Output stage = Fullbridge / IRF740s. Heatsinks were salvaged from an old AT PSU.
Output on 120V = 4.5" Max
Output on 230V = Around 8" before bridge died
Reliable operation on halfwave 120VDC, didn't quite survive halfwave 230VDC. It runs better with a smaller topload than the one shown in the pics below.
More photos here!
Video on 120V (500K)
Video on 230V (600K)
Tesladownunder, Sun Apr 16 2006, 05:55PM
Avalanche Nov 30 2005
This is my 3rd Tesla Coil, constructed in 2 days
fRes = 800Khz with (small) topload
Primary = 9T
Secondary = Approx 600-700T AWG35(?) wire (from old transformer)
Secondary Winding length = 3.5"
Driver = Steve C's PLL
Power Output stage = Fullbridge / IRF740s. Heatsinks were salvaged from an old AT PSU.
Output on 120V = 4.5" Max
Output on 230V = Around 8" before bridge died
Reliable operation on halfwave 120VDC, didn't quite survive halfwave 230VDC. It runs better with a smaller topload than the one shown in the pics below.
More photos here!
Video on 120V (500K)
Video on 230V (600K)
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:01PM
WilliamN Dec 13 2005
My ISSTC. Its 74HC14 based self res controller. Interuptor is remote, conenected via shielded cable. I started and finished this coil awhile ago, I just never got around to putting the finishing touches on the the stand, etc. My DRSSTC has taken alot of my coil time, but tonight I finshed this dude up. The interuptor controls the logic section by relay. When the fire button is pushed the coil comes to life. There is also a bright blue LED syncd with the interuptor signal. Gives a cool blinky effect from deep within the coils guts. The secondary is 4.5" diameter PVC, 17" long, wound with 31 AWG wire. The primary is wound on a 6" PVC coupling. Full bridge of 24N50s (there are pics on another thread). Stand is made from MDF. Input power via 20A variac. Max spark length is 20". I am happy with this coil and dont plan on changing anything else (may be a doubler )
Here are pics of the guts, with the top section of the stand removed.
Pics of sparks with 120VAC input, about 17". With longer on times they stretch out to 20" but I like the slender ones better.
Older mockup pick with shitty torroid. Notice my DRSSTC test mule in the backround.
Tesladownunder, Sun Apr 16 2006, 06:01PM
WilliamN Dec 13 2005
My ISSTC. Its 74HC14 based self res controller. Interuptor is remote, conenected via shielded cable. I started and finished this coil awhile ago, I just never got around to putting the finishing touches on the the stand, etc. My DRSSTC has taken alot of my coil time, but tonight I finshed this dude up. The interuptor controls the logic section by relay. When the fire button is pushed the coil comes to life. There is also a bright blue LED syncd with the interuptor signal. Gives a cool blinky effect from deep within the coils guts. The secondary is 4.5" diameter PVC, 17" long, wound with 31 AWG wire. The primary is wound on a 6" PVC coupling. Full bridge of 24N50s (there are pics on another thread). Stand is made from MDF. Input power via 20A variac. Max spark length is 20". I am happy with this coil and dont plan on changing anything else (may be a doubler )
Here are pics of the guts, with the top section of the stand removed.
Pics of sparks with 120VAC input, about 17". With longer on times they stretch out to 20" but I like the slender ones better.
Older mockup pick with shitty torroid. Notice my DRSSTC test mule in the backround.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:03PM
... Dec 23 2005
Meet my first VTTC; brought to you by a vt-136 tube, and a voltage doubled mot...
(that's a 1.5" long bolt on top)
My setup was as follows:
this design with
main power supply: variac + voltage doubled mot
plate supply: 12v/2a wall wart (was actually running the filament at 15v)
secondary:1.5" PVC would with 4" of unknown wire (~400 turns) Fres=2MHz
topload: none or 2" stainless bolt
primary: 20 turns of 20 awg magnet wire around a 4" plastic container (random wound)
feedback coil-20 turns of 22awg hookup wire around ^ container
tube: a single vt-136 (but I have another...)
tank cap:2 30kv/.5f caps in series
grid leak cap: two 2.2nf ceramic caps in series
grid leak resistor: 60k/20w worth of sandstone resistors
grid bios resistor: (the vt-136 is a tetrode) 60k/40w worth of sandstone resistors
It still needs more tuning and better coils, but it works!
Tesladownunder, Sun Apr 16 2006, 06:03PM
... Dec 23 2005
Meet my first VTTC; brought to you by a vt-136 tube, and a voltage doubled mot...
(that's a 1.5" long bolt on top)
My setup was as follows:
this design with
main power supply: variac + voltage doubled mot
plate supply: 12v/2a wall wart (was actually running the filament at 15v)
secondary:1.5" PVC would with 4" of unknown wire (~400 turns) Fres=2MHz
topload: none or 2" stainless bolt
primary: 20 turns of 20 awg magnet wire around a 4" plastic container (random wound)
feedback coil-20 turns of 22awg hookup wire around ^ container
tube: a single vt-136 (but I have another...)
tank cap:2 30kv/.5f caps in series
grid leak cap: two 2.2nf ceramic caps in series
grid leak resistor: 60k/20w worth of sandstone resistors
grid bios resistor: (the vt-136 is a tetrode) 60k/40w worth of sandstone resistors
It still needs more tuning and better coils, but it works!
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:07PM
Tesladownunder Jan 13 2006
Here is my TC made up for the Physics Dept at the Uni of Western Australia. I tried to incorporate the historical aspects of their 40 year old coil (see page 6, post 152 in this thread).
I really wasn't able to get much performance out of the the old setup so I have used the wooden bases and antique terminals in a hybrid acrylic/antique setup. The coil is conventional and was intended to be powered by one or two 12kV 30mA NST's but they found an 11kV 110mA NST in storage. Secondary is only 840 turns. Caps are standard CD .15uF, Two strings of 15 and the gap is a static 5 gap copper tube array.
Sparks are 25 inches but it does need to be contained in a Faraday cage for public safety. I have also made it on a large aluminium sheet counterpoise to allow operation in a non earthed environment.
It is still in progress and needs a fan, strike ring and upgraded Terry filter.
Peter
Tesladownunder, Sun Apr 16 2006, 06:07PM
Tesladownunder Jan 13 2006
Here is my TC made up for the Physics Dept at the Uni of Western Australia. I tried to incorporate the historical aspects of their 40 year old coil (see page 6, post 152 in this thread).
I really wasn't able to get much performance out of the the old setup so I have used the wooden bases and antique terminals in a hybrid acrylic/antique setup. The coil is conventional and was intended to be powered by one or two 12kV 30mA NST's but they found an 11kV 110mA NST in storage. Secondary is only 840 turns. Caps are standard CD .15uF, Two strings of 15 and the gap is a static 5 gap copper tube array.
Sparks are 25 inches but it does need to be contained in a Faraday cage for public safety. I have also made it on a large aluminium sheet counterpoise to allow operation in a non earthed environment.
It is still in progress and needs a fan, strike ring and upgraded Terry filter.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:08PM
Tesladownunder Jan 13 2006
..... and the Physics Dept coil in action. The gap looks quite interesting through the red acrylic, and very like a stereo LED equaliser array as the sparks jump around.
I must say they weren't entirely happy with the upgrade as it was no longer safe to draw sparks onto the demonstrators hand
Peter
Tesladownunder, Sun Apr 16 2006, 06:08PM
Tesladownunder Jan 13 2006
..... and the Physics Dept coil in action. The gap looks quite interesting through the red acrylic, and very like a stereo LED equaliser array as the sparks jump around.
I must say they weren't entirely happy with the upgrade as it was no longer safe to draw sparks onto the demonstrators hand
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:23PM
Reaching Jan 21 2006
i proudly present my newest DRSSTC work,
DRSSTC 3 4
Driver: Dual 74hc14 buffer zero current switching, overcurrent protection, 2 pairs of ucc drivers, secondary feedback.
Bridge:H-Bridge of 4x hgtg30n60a4d 8,8yF decoupling, dual GDT, 2700yF smoothing cap @309Volt DC
Primary9 Turns 3,5mm massive copper wire with an diameter of 16cm. Gap between each Turn 1cm
Secondary:11x32cm wound with 0,2mm Wire, 10x30cm Toroid, Resonant Frequency at 123kHz
mmc: 165nF at 6,4kV consists of 12 Wima MKP10 0,22 1600V 3 strins of 4 in series, each cap paralelled with 1m ohm resistor.
sparklenght, nearly 90cm ´
the complete coil is made out of 6 and 8mm thick HDPE sheets . I constructed everything as professional as possible. It took nearly 3 weeks to build. Everything is new on this coil, Bridge,Driver,Interrupter etc. The Driver is a Prototype made for my huge DRSSTC2 Projekt . I thought it had to be tested before i build it in my drsstc2
Tesladownunder, Sun Apr 16 2006, 06:23PM
Reaching Jan 21 2006
i proudly present my newest DRSSTC work,
DRSSTC 3 4
Driver: Dual 74hc14 buffer zero current switching, overcurrent protection, 2 pairs of ucc drivers, secondary feedback.
Bridge:H-Bridge of 4x hgtg30n60a4d 8,8yF decoupling, dual GDT, 2700yF smoothing cap @309Volt DC
Primary9 Turns 3,5mm massive copper wire with an diameter of 16cm. Gap between each Turn 1cm
Secondary:11x32cm wound with 0,2mm Wire, 10x30cm Toroid, Resonant Frequency at 123kHz
mmc: 165nF at 6,4kV consists of 12 Wima MKP10 0,22 1600V 3 strins of 4 in series, each cap paralelled with 1m ohm resistor.
sparklenght, nearly 90cm ´
the complete coil is made out of 6 and 8mm thick HDPE sheets . I constructed everything as professional as possible. It took nearly 3 weeks to build. Everything is new on this coil, Bridge,Driver,Interrupter etc. The Driver is a Prototype made for my huge DRSSTC2 Projekt . I thought it had to be tested before i build it in my drsstc2
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:31PM
Blackplasma Jan 24 2006
Here's my piny lil solid-state coil with puny lil sparks... about 800kHz
Tesladownunder, Sun Apr 16 2006, 06:31PM
Blackplasma Jan 24 2006
Here's my piny lil solid-state coil with puny lil sparks... about 800kHz
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:34PM
blackplasma Jan 24 2006
Can't help myself - before it all dies, here's another shot:
Tesladownunder, Sun Apr 16 2006, 06:34PM
blackplasma Jan 24 2006
Can't help myself - before it all dies, here's another shot:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:36PM
... Feb 1 2006
This is my newest coil, based on a pair of 811a's...
The secondary is 8" tall, 2.7" in diameter would with 32awg wire
The primary is ~15 turns of 22awg double insulated wire, the feedback is 18 turns of the same stuff about 1" above it.
It has a .6nf tank cap, 2.2nf grid leak cap, and a 4k grid leak resistor. I also found that I had to put a 4k wire wound resistor in between the feedback coil and the grid leak network to prevent the tube from arking from grid/filament where they pass into the tube (atmosphere side of metal/glass seal)
The power supply is a voltage doubled mot+varic (turned all of the way up for this pic)
Sparks were about 5", and didn't look all that much better than the ones from my 2.5"/5" secondary vttc, so I am using it now.
Tesladownunder, Sun Apr 16 2006, 06:36PM
... Feb 1 2006
This is my newest coil, based on a pair of 811a's...
The secondary is 8" tall, 2.7" in diameter would with 32awg wire
The primary is ~15 turns of 22awg double insulated wire, the feedback is 18 turns of the same stuff about 1" above it.
It has a .6nf tank cap, 2.2nf grid leak cap, and a 4k grid leak resistor. I also found that I had to put a 4k wire wound resistor in between the feedback coil and the grid leak network to prevent the tube from arking from grid/filament where they pass into the tube (atmosphere side of metal/glass seal)
The power supply is a voltage doubled mot+varic (turned all of the way up for this pic)
Sparks were about 5", and didn't look all that much better than the ones from my 2.5"/5" secondary vttc, so I am using it now.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:38PM
EDY19 Feb 1 2006
Here it is, I reposted it because the pictures were 12 inches out of date Based off a 74HC14, antenna feedback. 7 primary turns, with resonant frequency w/o topload of 179Khz. Sparks have reached 16 inches to a grounded target, with sparks to air commonly around 13-14 inches. Topload is overly large, but thats what works best. Secondary is 4.5 inches by 8.5 inches wound with 35ga wire, so 14 inch sparks w/o DRSSTC toplogy seems pretty good. It is run off steves SSTC2 intterupter.
Tesladownunder, Sun Apr 16 2006, 06:38PM
EDY19 Feb 1 2006
Here it is, I reposted it because the pictures were 12 inches out of date Based off a 74HC14, antenna feedback. 7 primary turns, with resonant frequency w/o topload of 179Khz. Sparks have reached 16 inches to a grounded target, with sparks to air commonly around 13-14 inches. Topload is overly large, but thats what works best. Secondary is 4.5 inches by 8.5 inches wound with 35ga wire, so 14 inch sparks w/o DRSSTC toplogy seems pretty good. It is run off steves SSTC2 intterupter.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:40PM
... Feb 1 2006
I got this little vttc (secondary is 5" tall as 2.7" in diameter) working about a week ago, but have been waiting to post it until I got it looking decent... I havn't made the box for all of the stuff to make the vttc work, but I have got the coils looking half decent so I will post them now and if I finish the box for the rest of the stuff (transformer, tube, resistors and caps) before this forum closes I will add it in.
The details are as follow:
HV supply: line filter -> mot out of a 1.2kw microwave oven ->150ohm/8w mmr (multi-miniature-resistor )
LV supply: 120v to 12.6vct 50va filament transformer
Tube: single 811a
secondary: 5" tall and 2.7" in diameter would with 32awg wire on a pvc form
primary: 12 turns of 22awg double insulated pvc wire on a 4" pvc form
feedback coil: 18 turns of 22awg double insulated wire on the same 4" form
grid leak network: 2.2nf cap and 4k wire wound resistor, with another 4k wire wound resistor in series with it (without it the tube arked over at the atmosphere side of the glass/metal seal
tank cap- 0.65nf 30kv doorknob cap
topload- a 2.5" fender washer with a 1/4-20 ss caphead bolt that I ground down to a point
(using a drill/file) sticking through it. On top of that there is a 1/4-20 nut that I made round and another washer stacked on top of it (heat sinks the bolt and gives hotter sparks)
Sparks are about 3" long, quite hot, graceful looking, and quiet; only a faint (very noticeable, but quiet enough for you to sit next to it for extended periods of time without being annoyed) 60hz buz There is almost no e-field emitted regardless of streamer output, it will only light up fluorescent lights for like 3" at most.
Tesladownunder, Sun Apr 16 2006, 06:40PM
... Feb 1 2006
I got this little vttc (secondary is 5" tall as 2.7" in diameter) working about a week ago, but have been waiting to post it until I got it looking decent... I havn't made the box for all of the stuff to make the vttc work, but I have got the coils looking half decent so I will post them now and if I finish the box for the rest of the stuff (transformer, tube, resistors and caps) before this forum closes I will add it in.
The details are as follow:
HV supply: line filter -> mot out of a 1.2kw microwave oven ->150ohm/8w mmr (multi-miniature-resistor )
LV supply: 120v to 12.6vct 50va filament transformer
Tube: single 811a
secondary: 5" tall and 2.7" in diameter would with 32awg wire on a pvc form
primary: 12 turns of 22awg double insulated pvc wire on a 4" pvc form
feedback coil: 18 turns of 22awg double insulated wire on the same 4" form
grid leak network: 2.2nf cap and 4k wire wound resistor, with another 4k wire wound resistor in series with it (without it the tube arked over at the atmosphere side of the glass/metal seal
tank cap- 0.65nf 30kv doorknob cap
topload- a 2.5" fender washer with a 1/4-20 ss caphead bolt that I ground down to a point
(using a drill/file) sticking through it. On top of that there is a 1/4-20 nut that I made round and another washer stacked on top of it (heat sinks the bolt and gives hotter sparks)
Sparks are about 3" long, quite hot, graceful looking, and quiet; only a faint (very noticeable, but quiet enough for you to sit next to it for extended periods of time without being annoyed) 60hz buz There is almost no e-field emitted regardless of streamer output, it will only light up fluorescent lights for like 3" at most.
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:41PM
... Feb 1 2006
I don't know how I forgot to add my second coil of all time. It was preceded only by a micro sgtc that I built using 32awg wire on a 3" tall by 3/8" wife form using a 4 22pf 3kv ceramic caps in series, a spark gap consisting of 2 wood screws screwd into a piece of 1/2" pvc pipe, and a power supply of a 30kv hfac module from a plasmaglobe (~20w power out) half-wave rectified with a string uf sf1600 diodes, giving sparks almost 1/2" long, bt since I don't have any pics I wont post it...
In any case, this coil cnsists of:
secondary: 5" tall and 2.7" in diameter (I really like that size secondary) wound with 32awg wire.
primary: 10turn flat primary made out of 14awg copper wire tied/glued down to some lexan taped at 4 turns
tank cap: 10 .015uf 2kv caps in series (942C20S15K's)
power suppy: 7.5kv/30ma nst that I added the line filter from an atx power supply to (in reverse)
spark gap: this has gone through many revisions, currently it is 2 steel (bad) 1/2" nuts superglued to a few pieces of acrylic with 1/2" steel roundhead bolts wound in them.
topload: 2" funnoodle covered in packing tape then Al foil (really leaky)
spark length: about 5" strikes (primary strikes) could be way longer with a better topload
here is a pic of the sparks from the topload, about 4" long
Tesladownunder, Sun Apr 16 2006, 06:41PM
... Feb 1 2006
I don't know how I forgot to add my second coil of all time. It was preceded only by a micro sgtc that I built using 32awg wire on a 3" tall by 3/8" wife form using a 4 22pf 3kv ceramic caps in series, a spark gap consisting of 2 wood screws screwd into a piece of 1/2" pvc pipe, and a power supply of a 30kv hfac module from a plasmaglobe (~20w power out) half-wave rectified with a string uf sf1600 diodes, giving sparks almost 1/2" long, bt since I don't have any pics I wont post it...
In any case, this coil cnsists of:
secondary: 5" tall and 2.7" in diameter (I really like that size secondary) wound with 32awg wire.
primary: 10turn flat primary made out of 14awg copper wire tied/glued down to some lexan taped at 4 turns
tank cap: 10 .015uf 2kv caps in series (942C20S15K's)
power suppy: 7.5kv/30ma nst that I added the line filter from an atx power supply to (in reverse)
spark gap: this has gone through many revisions, currently it is 2 steel (bad) 1/2" nuts superglued to a few pieces of acrylic with 1/2" steel roundhead bolts wound in them.
topload: 2" funnoodle covered in packing tape then Al foil (really leaky)
spark length: about 5" strikes (primary strikes) could be way longer with a better topload
here is a pic of the sparks from the topload, about 4" long
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:42PM
Vasil Feb 2 2006
Half bridge DRSSTC made with two BUP307 IGBTs
Antenna feedback driver
4.32 inches diam secondary, D/L =1/ 4.8, 2665 turns
res freq with toroid = 101 kHz
8 turns cilindrical primary
298 @ 13 kV primary cap
20 inches discharges
More information at:
Tesladownunder, Sun Apr 16 2006, 06:42PM
Vasil Feb 2 2006
Half bridge DRSSTC made with two BUP307 IGBTs
Antenna feedback driver
4.32 inches diam secondary, D/L =1/ 4.8, 2665 turns
res freq with toroid = 101 kHz
8 turns cilindrical primary
298 @ 13 kV primary cap
20 inches discharges
More information at:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:44PM
Vasil Feb 2 2006
Full bridge DRSSTC made with BUP314 IGBTs
Antenna feedback driver
4.32 inches diameter secondary, D/L = 1/4,8 , 2665 turns
resonant freq with a bigger toroid = 96.5 kHz
6 turns low coupled primary
300 nF @ 12 k primary cap
up to 40 inches streamers with 30 V on the IGBT gates
More information here:
See the "Step four"
Tesladownunder, Sun Apr 16 2006, 06:44PM
Vasil Feb 2 2006
Full bridge DRSSTC made with BUP314 IGBTs
Antenna feedback driver
4.32 inches diameter secondary, D/L = 1/4,8 , 2665 turns
resonant freq with a bigger toroid = 96.5 kHz
6 turns low coupled primary
300 nF @ 12 k primary cap
up to 40 inches streamers with 30 V on the IGBT gates
More information here:
See the "Step four"
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:46PM
Vasil Feb 3 2006
Dual MOT SGTC
Two MOT with seried secondaries, primarries in parallel, current limited with two ballast coils.
4.32 inches diam secondary, 966 turns
little toroid
7 turns primary, taped at 6 turns
25 nF @12.8 kV primary cap, MMC style
22 inches discharges.
Now updated to 35 nF primary cap, 5 turns primary, dual static spark gap, 25 inches streamers
More information:
Tesladownunder, Sun Apr 16 2006, 06:46PM
Vasil Feb 3 2006
Dual MOT SGTC
Two MOT with seried secondaries, primarries in parallel, current limited with two ballast coils.
4.32 inches diam secondary, 966 turns
little toroid
7 turns primary, taped at 6 turns
25 nF @12.8 kV primary cap, MMC style
22 inches discharges.
Now updated to 35 nF primary cap, 5 turns primary, dual static spark gap, 25 inches streamers
More information:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:48PM
Vasil Feb 3 2006
Mini DRSSTC with a half bridge made with BUP307 IGBTs (1200 V @ 35 A)
Antenna feedback driver
4.32 inches diam secondary, 1325 turns
res freq with toroid = 157 kHz
3 turns primary
250 nF primary cap
22 inches streamers
More information:
Tesladownunder, Sun Apr 16 2006, 06:48PM
Vasil Feb 3 2006
Mini DRSSTC with a half bridge made with BUP307 IGBTs (1200 V @ 35 A)
Antenna feedback driver
4.32 inches diam secondary, 1325 turns
res freq with toroid = 157 kHz
3 turns primary
250 nF primary cap
22 inches streamers
More information:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:49PM
Vasil Feb 3 2006
Ignition coil powered SGTC
1.5 inches diam secondary, 800 turns
ball topload
6-7 turns primary coil
3.6 nF primary cap
Dimmer cap driver for ignition coil
6 inches ground discharges
More information:
The final setup is at "Step four"
Tesladownunder, Sun Apr 16 2006, 06:49PM
Vasil Feb 3 2006
Ignition coil powered SGTC
1.5 inches diam secondary, 800 turns
ball topload
6-7 turns primary coil
3.6 nF primary cap
Dimmer cap driver for ignition coil
6 inches ground discharges
More information:
The final setup is at "Step four"
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:51PM
Vasil Feb 03 2006
OBIT powered SGTC
9500 V @ 23 mA OBIT
1.96 inches diam secondary, D/L = 1/4.7 , 1175 turns
little toroid
res freq = around 400 kHz
10 turns flat primary, taped at 9 turns
6.66 nF @ 24 kV MMC primary cap
up to 20 inches with a multiple spark gap
More information:
Tesladownunder, Sun Apr 16 2006, 06:51PM
Vasil Feb 03 2006
OBIT powered SGTC
9500 V @ 23 mA OBIT
1.96 inches diam secondary, D/L = 1/4.7 , 1175 turns
little toroid
res freq = around 400 kHz
10 turns flat primary, taped at 9 turns
6.66 nF @ 24 kV MMC primary cap
up to 20 inches with a multiple spark gap
More information:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:53PM
Vasil Feb 3 2006
Oudin coil
Big 14 cm diameter coil with 90 turns
470 nF @ 30 kV ceramic primary caps
res freq = around 2 MHz
Nice plasma display in light bulbs
More information at:
Tesladownunder, Sun Apr 16 2006, 06:53PM
Vasil Feb 3 2006
Oudin coil
Big 14 cm diameter coil with 90 turns
470 nF @ 30 kV ceramic primary caps
res freq = around 2 MHz
Nice plasma display in light bulbs
More information at:
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:54PM
Vasil Feb 3 2006
Flyback powered mini SGTC
AC flyback rectifyed, driven by a ZVS driver
1.96 inches diameter secondary, 1075 turns
ball topload
6-7 turns primary
3.6 nF primary cap
simple static gap
For specific current seting, the output is a single waving streamer
More information:
Final setup at "Step nine"
Tesladownunder, Sun Apr 16 2006, 06:54PM
Vasil Feb 3 2006
Flyback powered mini SGTC
AC flyback rectifyed, driven by a ZVS driver
1.96 inches diameter secondary, 1075 turns
ball topload
6-7 turns primary
3.6 nF primary cap
simple static gap
For specific current seting, the output is a single waving streamer
More information:
Final setup at "Step nine"
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 06:56PM
Vasil Feb 3 2006
Single flyback powered SGTC
Using a single DC flyback and a big SGTC system at low bang rate, up to 90 cm ground discharges can be achieved.
More information:
Look at "Steps 12-14"
Tesladownunder, Sun Apr 16 2006, 06:56PM
Vasil Feb 3 2006
Single flyback powered SGTC
Using a single DC flyback and a big SGTC system at low bang rate, up to 90 cm ground discharges can be achieved.
More information:
Look at "Steps 12-14"
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Apr 16 2006, 07:03PM
************************************************** ***********************
Tesladownunder Feb 11 2006
Well, after 23,000 hits this is the last post before everyone heads off to the new brighter 4HV around Feb 10th 2006.
Peter
------------------------------------ -------------------------------------------------- ------------
Now follows new entries since the start of the current 4HV.org
(don't forget the posting rules which are slightly changed since a post can contain 2 photos)
The 3 Rules to keep it consistent and readable:
Each coil to have only 1 page of info (ie fits on your computer screen). Brief is best.
Each coil to have only 2 photos (do not double post for the second photo).
Only coil details and photos to be posted. Direct any queries direct to the person or in a new thread.
A coil is defined by its secondary (change of toroid isn't a new coil)
Enter as many coils as you wish. Beginners coils are welcome and this log is designed to be helpful for beginners.
Peter
Tesladownunder, Sun Apr 16 2006, 07:03PM
************************************************** ***********************
Tesladownunder Feb 11 2006
Well, after 23,000 hits this is the last post before everyone heads off to the new brighter 4HV around Feb 10th 2006.
Peter
------------------------------------ -------------------------------------------------- ------------
Now follows new entries since the start of the current 4HV.org
(don't forget the posting rules which are slightly changed since a post can contain 2 photos)
The 3 Rules to keep it consistent and readable:
Each coil to have only 1 page of info (ie fits on your computer screen). Brief is best.
Each coil to have only 2 photos (do not double post for the second photo).
Only coil details and photos to be posted. Direct any queries direct to the person or in a new thread.
A coil is defined by its secondary (change of toroid isn't a new coil)
Enter as many coils as you wish. Beginners coils are welcome and this log is designed to be helpful for beginners.
Peter
Re: ** Add your Tesla coil here **
Extreme Electronics, Sun Apr 16 2006, 09:36PM
Sprite, a small DRSSTC
Topload 153mm x 38mm toroid
Secondary 900T of 0.125mm on 127mm tall x40mm diameter
Primary 6T 1mm copper
Primary Cap 22nF @3KV (4x47nF @1.5Kv in series parallel)
IGBTS 2 x 4PH30KD Half bridge
Fres 500Khz Approx
Output 10" arc to ground.
More information
Congratulations to Peter for doing a sterling job of replacing the coils on this thread...
Extreme Electronics, Sun Apr 16 2006, 09:36PM
Sprite, a small DRSSTC
Topload 153mm x 38mm toroid
Secondary 900T of 0.125mm on 127mm tall x40mm diameter
Primary 6T 1mm copper
Primary Cap 22nF @3KV (4x47nF @1.5Kv in series parallel)
IGBTS 2 x 4PH30KD Half bridge
Fres 500Khz Approx
Output 10" arc to ground.
More information
Congratulations to Peter for doing a sterling job of replacing the coils on this thread...
Re: ** Add your Tesla coil here **
Bennem, Mon Apr 17 2006, 08:40AM
My second DRSSTC,
8 inchx3.5inch secondary wound with 36AWG,
Full bridge of HGT1N40N60A4D igbt's,
75nf res capacitor,
4x 470uf storage caps with 2x10uf on the igbt's.
Steve Wards driver circuit with OCD, primary feedback,
Primary is tapped at 4.5 turns.
total height is 17.5 inches.
Bennem, Mon Apr 17 2006, 08:40AM
My second DRSSTC,
8 inchx3.5inch secondary wound with 36AWG,
Full bridge of HGT1N40N60A4D igbt's,
75nf res capacitor,
4x 470uf storage caps with 2x10uf on the igbt's.
Steve Wards driver circuit with OCD, primary feedback,
Primary is tapped at 4.5 turns.
total height is 17.5 inches.
Re: ** Add your Tesla coil here **
JimG, Tue Apr 18 2006, 05:08AM
This is my first DRSSTC. It was built over a couple of weeks in July 2005.
It was wound on a 15"x4.25" secondary with a 13"x4" topload.
Primary capacitance of 186nf.
It uses a full bridge of 40n60s, has a direct feedback driver with soft switching, overcurrent protection, adjustable deadtime, and a fiber optic driven interrupter.
JimG, Tue Apr 18 2006, 05:08AM
This is my first DRSSTC. It was built over a couple of weeks in July 2005.
It was wound on a 15"x4.25" secondary with a 13"x4" topload.
Primary capacitance of 186nf.
It uses a full bridge of 40n60s, has a direct feedback driver with soft switching, overcurrent protection, adjustable deadtime, and a fiber optic driven interrupter.
Re: ** Add your Tesla coil here **
Terry Fritz, Wed Apr 19 2006, 04:01AM
Hi,
Sort of a "test post for newbee me here"...
Here is the "first" OLTC
Cheers,
Terry
Terry Fritz, Wed Apr 19 2006, 04:01AM
Hi,
Sort of a "test post for newbee me here"...
Here is the "first" OLTC
Cheers,
Terry
Re: ** Add your Tesla coil here **
Cesiumsponge, Thu Apr 20 2006, 01:23AM
An old picture of my VTTC and some less commonly seen streamers. I can't believe they're almost 3 years old. Hasn't been fired for at least 2 years, doh! I'll have to get back into this stuff.
mod edit: Whoa, that last picture is a bit too wide! Welcome back Eric!
Cesiumsponge, Thu Apr 20 2006, 01:23AM
An old picture of my VTTC and some less commonly seen streamers. I can't believe they're almost 3 years old. Hasn't been fired for at least 2 years, doh! I'll have to get back into this stuff.
mod edit: Whoa, that last picture is a bit too wide! Welcome back Eric!
Re: ** Add your Tesla coil here **
williamn, Thu Apr 20 2006, 04:11AM
Here is my small DRSSTC: 3.5"x9" secondary form. 32AWG magnet wire. Two 1500uf 250VDC caps with two diodes form the voltage doubler. Halfbridge of 30N60A4D. Primary current feedback with OCD as well. Maximum length discharge is about 20". This coil has provided many hours of runtime and has now been retired. I used it as a test bed and am working on Minime2 using what I learned on this one.
Video of coil running http://www.texaslightning.4hv.org/mini_me_drsstc2.wmv
williamn, Thu Apr 20 2006, 04:11AM
Here is my small DRSSTC: 3.5"x9" secondary form. 32AWG magnet wire. Two 1500uf 250VDC caps with two diodes form the voltage doubler. Halfbridge of 30N60A4D. Primary current feedback with OCD as well. Maximum length discharge is about 20". This coil has provided many hours of runtime and has now been retired. I used it as a test bed and am working on Minime2 using what I learned on this one.
Video of coil running http://www.texaslightning.4hv.org/mini_me_drsstc2.wmv
Re: ** Add your Tesla coil here **
Avalanche, Fri May 26 2006, 12:48AM
It's about time my latest coil had a place in this thread.
This is my coil, nicknamed 'Triangular Cellulation'. Don't ask why!
Anyway it runs at well over 1Mhz, due to the rather heavy gauge wire on the secondary. It is PLL driven, and has a halfbridge of IRFP460s for the power output stage. Max output currently is just under under 4" to air, with 110V into the halfbridge. Haven't tried it directly on the mains yet.
The secondary coil is about 2" diameter, just to give you an idea on the size of this thing. It isn't tiny, but it is a rather small coil. Quite a nice size really!
Future plans - Add an interrupter, and make it into a DRSSTC.
Check out the video also: Here, 2.2MB MPEG1
Avalanche, Fri May 26 2006, 12:48AM
It's about time my latest coil had a place in this thread.
This is my coil, nicknamed 'Triangular Cellulation'. Don't ask why!
Anyway it runs at well over 1Mhz, due to the rather heavy gauge wire on the secondary. It is PLL driven, and has a halfbridge of IRFP460s for the power output stage. Max output currently is just under under 4" to air, with 110V into the halfbridge. Haven't tried it directly on the mains yet.
The secondary coil is about 2" diameter, just to give you an idea on the size of this thing. It isn't tiny, but it is a rather small coil. Quite a nice size really!
Future plans - Add an interrupter, and make it into a DRSSTC.
Check out the video also: Here, 2.2MB MPEG1
Re: ** Add your Tesla coil here **
Avalanche, Sat May 27 2006, 02:05PM
My mini spark gap coil
This is the first spark gap coil I have constructed. It's powered by a monitor flyback, using the ZVS circuit. At 24 volts in to the ZVS, I am getting about 3" maximum streamers.
Uses a tank cap of approx 4nF, 4 beer bottle caps. The spark gap is made of 3 brass nuts.
Video: 2.8MB MPEG1
Edit: The coil now has a webpage on my site (see sig)
Avalanche, Sat May 27 2006, 02:05PM
My mini spark gap coil
This is the first spark gap coil I have constructed. It's powered by a monitor flyback, using the ZVS circuit. At 24 volts in to the ZVS, I am getting about 3" maximum streamers.
Uses a tank cap of approx 4nF, 4 beer bottle caps. The spark gap is made of 3 brass nuts.
Video: 2.8MB MPEG1
Edit: The coil now has a webpage on my site (see sig)
Re: ** Add your Tesla coil here **
McFluffin, Thu Jun 01 2006, 03:10AM
I've had my avatar my rotary spark gap since the old 4hv, yet I never posted my TC since I never tried turning it on until a bit ago. I have a home made capacitor that seems to be not holding a charge, but heres a pic of the coil anyway. 10.5kV Franceformer @ 30mA.
McFluffin, Thu Jun 01 2006, 03:10AM
I've had my avatar my rotary spark gap since the old 4hv, yet I never posted my TC since I never tried turning it on until a bit ago. I have a home made capacitor that seems to be not holding a charge, but heres a pic of the coil anyway. 10.5kV Franceformer @ 30mA.
Re: ** Add your Tesla coil here **
Steve Ward, Sat Jun 17 2006, 07:58PM
A big high power SSTC. Produces 18" sparks (so far) in CW mode, and 33" sparks in full-wave rectified mode (no filtering). Its a power hog, pulling up to 30A on the 240V line. Uses a bridge of IXFN80N50 MOSFETs, which never get more than a few degrees above ambient. The primary and secondary are from my magnifier experiments (secondary is 12.75"x20" with .035" diameter wire). The driver is a rip-off of Steve Conners PLL driver that i built 2 years ago. All the parts were already on-hand except the base which i put together in an hour or so, so this coil was built in just a day (it was mostly wiring and tuning). Its interesting to note that the TC load is a constant current sink. Once about a 3" breakout is achieved, the primary current is fixed from then on (typically 24Apk in CW mode, and 50Apk in unfiltered mode because i reduce the primary from 10 turns to 5 turns). So bridge dissipation is pretty much the same at 15% input as it is at 100% input (only switching losses increase). Check out the pictures and videos here:
Steve Ward, Sat Jun 17 2006, 07:58PM
A big high power SSTC. Produces 18" sparks (so far) in CW mode, and 33" sparks in full-wave rectified mode (no filtering). Its a power hog, pulling up to 30A on the 240V line. Uses a bridge of IXFN80N50 MOSFETs, which never get more than a few degrees above ambient. The primary and secondary are from my magnifier experiments (secondary is 12.75"x20" with .035" diameter wire). The driver is a rip-off of Steve Conners PLL driver that i built 2 years ago. All the parts were already on-hand except the base which i put together in an hour or so, so this coil was built in just a day (it was mostly wiring and tuning). Its interesting to note that the TC load is a constant current sink. Once about a 3" breakout is achieved, the primary current is fixed from then on (typically 24Apk in CW mode, and 50Apk in unfiltered mode because i reduce the primary from 10 turns to 5 turns). So bridge dissipation is pretty much the same at 15% input as it is at 100% input (only switching losses increase). Check out the pictures and videos here:
Re: ** Add your Tesla coil here **
Reaching, Wed Jul 12 2006, 07:09PM
Here is my new drsstc6
Primary: 7 Turns of 1/4" copper tubing with an diameter of 10"
Secondary: 6"x19" wound with 0,3mm
Toroid: 4"x16" alu ducting pipe smoothed and covered with alutape
MMC: 220nF 8kV
Bridge: Fullbridge of 40n60s running at 310V dc
Longest streamer so far: 48"
The drsstc6 is my first primary feedback drsstc. the driver has a onboard overcurrent detection set to 550A. interrupter input is around 200bps and 120yS on Time
Reaching, Wed Jul 12 2006, 07:09PM
Here is my new drsstc6
Primary: 7 Turns of 1/4" copper tubing with an diameter of 10"
Secondary: 6"x19" wound with 0,3mm
Toroid: 4"x16" alu ducting pipe smoothed and covered with alutape
MMC: 220nF 8kV
Bridge: Fullbridge of 40n60s running at 310V dc
Longest streamer so far: 48"
The drsstc6 is my first primary feedback drsstc. the driver has a onboard overcurrent detection set to 550A. interrupter input is around 200bps and 120yS on Time
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Jul 22 2006, 04:23AM
Well, I might as well put the first SISG (SIDAC IGBT Spark Gap) TC here. The driver was developed by Terry Fritz and details are here. They work MUCH better than SIDAC's alone that I experimented with last year.
Each driver fires at 900V to be within the IGBT 1200V rating. Multiple drivers are simple daisy chained to reach the desired firing voltage eg 12kV NST requires 16 stages which adds to cost. However it does open the way for using lower voltages in the MOT range where real spark gaps don't work well.
Terry and Mark have coils with sparks in the 30-40 inch range now.
Don't even ask about the details of this coil with it's massive 1 inch sparks and huge copper tube primary. It is running off 900V with one stage.
Just to be first with an SISG on this thread....
Peter
Tesladownunder, Sat Jul 22 2006, 04:23AM
Well, I might as well put the first SISG (SIDAC IGBT Spark Gap) TC here. The driver was developed by Terry Fritz and details are here. They work MUCH better than SIDAC's alone that I experimented with last year.
Each driver fires at 900V to be within the IGBT 1200V rating. Multiple drivers are simple daisy chained to reach the desired firing voltage eg 12kV NST requires 16 stages which adds to cost. However it does open the way for using lower voltages in the MOT range where real spark gaps don't work well.
Terry and Mark have coils with sparks in the 30-40 inch range now.
Don't even ask about the details of this coil with it's massive 1 inch sparks and huge copper tube primary. It is running off 900V with one stage.
Just to be first with an SISG on this thread....
Peter
Re: ** Add your Tesla coil here **
JimG, Fri Aug 04 2006, 03:33AM
This is the second DRSSTC that I made. It's built from the left over test circuit and bridge that I used while building my first DRSSTC. It has a 3.5"x10.5" secondary and 1.75"x3" toroid.
JimG, Fri Aug 04 2006, 03:33AM
This is the second DRSSTC that I made. It's built from the left over test circuit and bridge that I used while building my first DRSSTC. It has a 3.5"x10.5" secondary and 1.75"x3" toroid.
Re: ** Add your Tesla coil here **
williamn, Fri Aug 04 2006, 03:20PM
Here is my new Small DRSSTC. It took sometime to finish but it ended up very nice I think. The main objective I had when I set out to build this coil was I wanted something compact, small, and easy to use. My other coils must be run outside and take awhile to set up. With this coil all I need to do is plug it in and let her go! I built an interupter that allows me to adjust from 0usec ontime-200usec ontime in 2 turns, no heavy variac required. The coil measures 15" total from top of the toroid to the bottom of the stand.
Here is short Movie of it running:
williamn, Fri Aug 04 2006, 03:20PM
Here is my new Small DRSSTC. It took sometime to finish but it ended up very nice I think. The main objective I had when I set out to build this coil was I wanted something compact, small, and easy to use. My other coils must be run outside and take awhile to set up. With this coil all I need to do is plug it in and let her go! I built an interupter that allows me to adjust from 0usec ontime-200usec ontime in 2 turns, no heavy variac required. The coil measures 15" total from top of the toroid to the bottom of the stand.
- Secondary form: 3.5" x 9" PVC
- Winding length: 8"
- Wire gauge: 32AWG
- Topload: 8"x2" Info unlimited spun AL toroid
- Loaded Fres: 240Khz
- Switching Topology:halfbridge with voltage doubler
- IGBT: HGTG30N60A4
- Control Topology: Primary Current feedback with overcurrent protection
- MMC: 70nF 3KV made up of (6) 47nF 1.5KV LCR WF serries caps
- Performace: longest strike so far is 18"
Here is short Movie of it running:
Re: ** Add your Tesla coil here **
King_of_Junk, Sun Aug 20 2006, 08:03PM
This was my first coil.
2 MOT supply- 4kv
10 microwave caps
Static spark gap
6in. long, 2.5in. wide secondary.
Had some real trouble finding wire. I had to use wire off an old microwave fan motor, so it wasn't the best, but better than nothing.
Horrible spark gap timing- either wouldn't fire or wouldn't quench. Probably needed to have a rotary gap.
Toroid was too big, but before I could test it with a smaller one (I regret to say...) I had to move it into storage. (sister knocked it over- broke some stuff.) Never got very good results- maybe 1/2 inch intermittent sparks off the toroid.
Currently working on a DC flyback coil- may audio modulate it. When I get the chance (and a variac and a lot more wire) I'll bring this one back to life. I have the means (and by means I mean MOTs) to make this one more powerful, but I need a better secondary before I will want to do that.
King_of_Junk, Sun Aug 20 2006, 08:03PM
This was my first coil.
2 MOT supply- 4kv
10 microwave caps
Static spark gap
6in. long, 2.5in. wide secondary.
Had some real trouble finding wire. I had to use wire off an old microwave fan motor, so it wasn't the best, but better than nothing.
Horrible spark gap timing- either wouldn't fire or wouldn't quench. Probably needed to have a rotary gap.
Toroid was too big, but before I could test it with a smaller one (I regret to say...) I had to move it into storage. (sister knocked it over- broke some stuff.) Never got very good results- maybe 1/2 inch intermittent sparks off the toroid.
Currently working on a DC flyback coil- may audio modulate it. When I get the chance (and a variac and a lot more wire) I'll bring this one back to life. I have the means (and by means I mean MOTs) to make this one more powerful, but I need a better secondary before I will want to do that.
Re: ** Add your Tesla coil here **
williamn, Mon Aug 21 2006, 01:12AM
Here is my newest DRSSTC. Its an older one that I had been converting from a fullbridge of 40N60s to one Toshiba halfbridge module (brick). This coil uses Steve Ward's newest highside driver to soup up these slower bricks. The secondary form is 4.5" diameter PVC 20.5 inches long wound with 31AWG magnet wire The primary is 6 turns of .25" copper tubing wound in a vertical helix with .25" spacing between turns and a diameter of 9.5". The secondary plus topload have a measured Fres of 83Khz. My mmc is 5 strings of 2 serries .15uf 2kv CDE 942C caps giving .375uf 4kv. The coil runs beautifully and so far I have achieved 40" discharges to a strike target. I am sure there is more left and I plan on squeezing at least 3X secondary length out of it.
You can read more about this coil on this thread here: http://4hv.org/e107_plugins/forum/forum_viewtopic.php?6766
williamn, Mon Aug 21 2006, 01:12AM
Here is my newest DRSSTC. Its an older one that I had been converting from a fullbridge of 40N60s to one Toshiba halfbridge module (brick). This coil uses Steve Ward's newest highside driver to soup up these slower bricks. The secondary form is 4.5" diameter PVC 20.5 inches long wound with 31AWG magnet wire The primary is 6 turns of .25" copper tubing wound in a vertical helix with .25" spacing between turns and a diameter of 9.5". The secondary plus topload have a measured Fres of 83Khz. My mmc is 5 strings of 2 serries .15uf 2kv CDE 942C caps giving .375uf 4kv. The coil runs beautifully and so far I have achieved 40" discharges to a strike target. I am sure there is more left and I plan on squeezing at least 3X secondary length out of it.
You can read more about this coil on this thread here: http://4hv.org/e107_plugins/forum/forum_viewtopic.php?6766
Re: ** Add your Tesla coil here **
Bennem, Mon Aug 21 2006, 04:57PM
Here's my third DRSSTC.
secondary...7 inch x 2
Toroid....6 x 1.75 inch (John Freau spun)
primary.....2.9 inch wound with 12AWG wire
75 nf res. cap
Total res. frequency according to JAVA TC calculator is 392 Khz
full bridge of HGT1n40N60A4D's (yeah way over kill!)
Steve Wards driver circuit with OCD
Primary feedback
LED bar graph peak driver and display
Total height of coil.....13.5 inches
Bennem, Mon Aug 21 2006, 04:57PM
Here's my third DRSSTC.
secondary...7 inch x 2
Toroid....6 x 1.75 inch (John Freau spun)
primary.....2.9 inch wound with 12AWG wire
75 nf res. cap
Total res. frequency according to JAVA TC calculator is 392 Khz
full bridge of HGT1n40N60A4D's (yeah way over kill!)
Steve Wards driver circuit with OCD
Primary feedback
LED bar graph peak driver and display
Total height of coil.....13.5 inches
Re: ** Add your Tesla coil here **
Thomas, Sun Sept 03 2006, 10:27PM
Here's my mini telsa coil, it's my first sparkgap. The secondary has a 2.5" by 13" coil form. It's using 32AWG wiring, so thats approximately 1580 turns of wire (counting insulation). This coil can produce up to 15" sparks. The transformer used is a 9kV 30mA NST. The top toriod is 3" by 9" and the little one is 1" by 6.5".
Thomas, Sun Sept 03 2006, 10:27PM
Here's my mini telsa coil, it's my first sparkgap. The secondary has a 2.5" by 13" coil form. It's using 32AWG wiring, so thats approximately 1580 turns of wire (counting insulation). This coil can produce up to 15" sparks. The transformer used is a 9kV 30mA NST. The top toriod is 3" by 9" and the little one is 1" by 6.5".
Re: ** Add your Tesla coil here **
Self Defenestrate, Wed Sept 13 2006, 01:57PM
Heres my first coil, actually built last year, but slowly upgraded and tuned. Specs go as follows: 30 watts, 1kv 30ma, 2 CDE942's for the tank (series), taped at turn 2.5, and 1/8" tungsten rod for the gap. Best strike is 7".
Self Defenestrate, Wed Sept 13 2006, 01:57PM
Heres my first coil, actually built last year, but slowly upgraded and tuned. Specs go as follows: 30 watts, 1kv 30ma, 2 CDE942's for the tank (series), taped at turn 2.5, and 1/8" tungsten rod for the gap. Best strike is 7".
Re: ** Add your Tesla coil here **
c4r0, Fri Sept 29 2006, 12:43PM
This is my first SSTC (at last it works
). Secondary: 250x100 mm. Two IRF820s in halfbridge. Antenna feedback. Based on Steve Ward's Mini SSTC project
c4r0, Fri Sept 29 2006, 12:43PM
This is my first SSTC (at last it works
). Secondary: 250x100 mm. Two IRF820s in halfbridge. Antenna feedback. Based on Steve Ward's Mini SSTC project 
Re: ** Add your Tesla coil here **
Tesladownunder, Fri Sept 29 2006, 06:27PM
This is a small Science Fair commercial Tesla coil which looks quite old and is in an exhibit in the Western Power World of Energy museum in Fremantle, Western Australia.
Couldn't really see any detail or get any further info.
Peter
Tesladownunder, Fri Sept 29 2006, 06:27PM
This is a small Science Fair commercial Tesla coil which looks quite old and is in an exhibit in the Western Power World of Energy museum in Fremantle, Western Australia.
Couldn't really see any detail or get any further info.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Fri Sept 29 2006, 07:06PM
This Tesla coil comes from the new travelling display from the Nikola Tesla museum in Belgrade. It visited Perth Western Australia as its first destination and will go on to Strasbourg, Wein, Vancouver and Paris.
It is a very old style coil with glass plate caps and a serrated wheel gap. It wasn't a great performer despite the Serbian Orthodox blessing.
Peter
Tesladownunder, Fri Sept 29 2006, 07:06PM
This Tesla coil comes from the new travelling display from the Nikola Tesla museum in Belgrade. It visited Perth Western Australia as its first destination and will go on to Strasbourg, Wein, Vancouver and Paris.
It is a very old style coil with glass plate caps and a serrated wheel gap. It wasn't a great performer despite the Serbian Orthodox blessing.
Peter
Re: ** Add your Tesla coil here **
Avalanche, Fri Sept 29 2006, 11:31PM
Here's my latest creation, although it isn't quite finished yet.
Flyback powered SGTC, using the ZVS circuit and a large flyback. 2" diameter secondary. It's supposed to be a portable demonstration unit that can be powered from a car battery. More info on my site!
Avalanche, Fri Sept 29 2006, 11:31PM
Here's my latest creation, although it isn't quite finished yet.
Flyback powered SGTC, using the ZVS circuit and a large flyback. 2" diameter secondary. It's supposed to be a portable demonstration unit that can be powered from a car battery. More info on my site!
Re: ** Add your Tesla coil here **
Hazmatt_(The Underdog), Mon Nov 06 2006, 06:16AM
Here's My SGTC Tesla coil operating with a 12/60 NST, 40KVDC Doorknobs, and lovely output streamers.
video:
Here's a larger picture of a test setup:
I am studying the effects of sympathetic breakouts.
Hazmatt_(The Underdog), Mon Nov 06 2006, 06:16AM
Here's My SGTC Tesla coil operating with a 12/60 NST, 40KVDC Doorknobs, and lovely output streamers.
video:
Here's a larger picture of a test setup:
I am studying the effects of sympathetic breakouts.
Re: ** Add your Tesla coil here **
ragnar, Tue Dec 05 2006, 05:04AM
This SSTC was designed to run at 13.56MHz, but its actual operating frequency shifts from ~12.7 to ~14MHz depending on its surroundings. The discharge makes no noise of its own, and is audio modulated by FM.
Plasma is VERY dense, VERY hot.
This is the DS waveform, 40nS/20V per div., supply voltage is 32V.
ragnar, Tue Dec 05 2006, 05:04AM
This SSTC was designed to run at 13.56MHz, but its actual operating frequency shifts from ~12.7 to ~14MHz depending on its surroundings. The discharge makes no noise of its own, and is audio modulated by FM.
Plasma is VERY dense, VERY hot.
This is the DS waveform, 40nS/20V per div., supply voltage is 32V.
Re: ** Add your Tesla coil here **
Tesladownunder, Sat Dec 09 2006, 03:50AM
Here is a mini TC made from the components of 1 microwave oven. This was a competition that I set up but no-one won. I did eventually complete mine some just 9 days late. Shown here with 1/2 inch sparks only but best in development has been 1 inch and plenty of scope for improvement with better design.
The details:
Power supply is the MOT. This needs current limiting and this is achieved with a 150nF capacitor and the voltage is boosted by a one stage multiplier using the MOT diode to give 4kV peak. Note that power is taken off across the diode not across the cap to get the voltage multiplier effect. Hey what's this about a 150nF cap? Where is that in a microwave oven? Well that is the key to this project. The 1uF 10kV DC mylar and oil cap (that is in all non-inverter MO's) needs to be taken apart and unwound. Lengths of the multilayered dielectric and foil are taken out and cut to length. It took about 10 feet of the windings to make 150nF. This is perhaps only 30% of the total. New electrodes were added.
Tank cap. This is a 1nF cap. The technique is similar but I retained the original electrodes from the cap to use in this section as they were better suited to a high current. Construction of this cap was different in view of the much higher voltage/current and frequency stresses. It used about 30% of the length of the cap windings. The plates were only about 1 foot long by 2 inches, however I used two sections of foil/dielectric between them. The foil was not connected and was kept to equalise voltage stresses. All in all something like 12 layers of mylar and 2 foil layers separate the main electrodes.
Being mylar they do warm up a bit.
Spark gap This is two aluminium electrodes (from the frame of the MO fan) bolted to part of the MO timer circuit board with all the components and printed circuit ground off. It really needs another section to give better quenching.
Primary is the MO transformer 6V winding which is heavy copper. This is stuck on to the 3 legged wheeled frame that the glass food tray sits on and rotates.
Secondary former is the cardboard internal cardboard insulation from the HV cap. It was washed but became a bit soft but still usable.
Secondary windings use wire from the fan motor and less than half was used. The hot glue didn't stick the cardboard former together properly and the windings slipped and overlapped. I have had some interturn shorting (and may still have) so I can't really push the power much without a rewind. No idea how many turns.
Toroid I did try winding lots of turns of wire on the fan blades but it didn't improve the performance. so I just left the metal mesh spacer that sits on the output of the magnetron for a nice colour.
Pics show the cap construction, overall plan and sparks close up. Not fabulous performance but the proof of principle is there are plenty of opportunities to do better.
Peter
Tesladownunder, Sat Dec 09 2006, 03:50AM
Here is a mini TC made from the components of 1 microwave oven. This was a competition that I set up but no-one won. I did eventually complete mine some just 9 days late. Shown here with 1/2 inch sparks only but best in development has been 1 inch and plenty of scope for improvement with better design.
The details:
Power supply is the MOT. This needs current limiting and this is achieved with a 150nF capacitor and the voltage is boosted by a one stage multiplier using the MOT diode to give 4kV peak. Note that power is taken off across the diode not across the cap to get the voltage multiplier effect. Hey what's this about a 150nF cap? Where is that in a microwave oven? Well that is the key to this project. The 1uF 10kV DC mylar and oil cap (that is in all non-inverter MO's) needs to be taken apart and unwound. Lengths of the multilayered dielectric and foil are taken out and cut to length. It took about 10 feet of the windings to make 150nF. This is perhaps only 30% of the total. New electrodes were added.
Tank cap. This is a 1nF cap. The technique is similar but I retained the original electrodes from the cap to use in this section as they were better suited to a high current. Construction of this cap was different in view of the much higher voltage/current and frequency stresses. It used about 30% of the length of the cap windings. The plates were only about 1 foot long by 2 inches, however I used two sections of foil/dielectric between them. The foil was not connected and was kept to equalise voltage stresses. All in all something like 12 layers of mylar and 2 foil layers separate the main electrodes.
Being mylar they do warm up a bit.
Spark gap This is two aluminium electrodes (from the frame of the MO fan) bolted to part of the MO timer circuit board with all the components and printed circuit ground off. It really needs another section to give better quenching.
Primary is the MO transformer 6V winding which is heavy copper. This is stuck on to the 3 legged wheeled frame that the glass food tray sits on and rotates.
Secondary former is the cardboard internal cardboard insulation from the HV cap. It was washed but became a bit soft but still usable.
Secondary windings use wire from the fan motor and less than half was used. The hot glue didn't stick the cardboard former together properly and the windings slipped and overlapped. I have had some interturn shorting (and may still have) so I can't really push the power much without a rewind. No idea how many turns.
Toroid I did try winding lots of turns of wire on the fan blades but it didn't improve the performance. so I just left the metal mesh spacer that sits on the output of the magnetron for a nice colour.
Pics show the cap construction, overall plan and sparks close up. Not fabulous performance but the proof of principle is there are plenty of opportunities to do better.
Peter
Re: ** Add your Tesla coil here **
Tesladownunder, Sun Jan 28 2007, 02:02AM
This is my "Fill your backyard with sparks coil"
It is an addition to the toroid with a 7ft long rotating breakout point. When view in a time exposure the streamers and sparks are spread over a wide area. Photo shows a 13 second exposure.
Peter
Tesladownunder, Sun Jan 28 2007, 02:02AM
This is my "Fill your backyard with sparks coil"
It is an addition to the toroid with a 7ft long rotating breakout point. When view in a time exposure the streamers and sparks are spread over a wide area. Photo shows a 13 second exposure.
Peter
Re: ** Add your Tesla coil here **
Thomas, Fri Mar 02 2007, 05:37PM
Here's two pictures of my SSTC V1. It has a 2.5" x 13" secondary, the primary has 8 turns and it uses positive feedback from the H-bridge. It's pretty much derived from Richie Burnett design, except for a few circuitry changes.
Thomas, Fri Mar 02 2007, 05:37PM
Here's two pictures of my SSTC V1. It has a 2.5" x 13" secondary, the primary has 8 turns and it uses positive feedback from the H-bridge. It's pretty much derived from Richie Burnett design, except for a few circuitry changes.
Re: ** Add your Tesla coil here **
Brett Miller, Wed Apr 04 2007, 09:34PM
Here is my second SSTC. It is basically the natural progression of my solid state path so far, that being the well traveled Steve Ward formula. I would like to thank Steve for taking time to answer my questions on many occations.
I built a version of his MicroSSTC, but used an isolated logic supply and built a remote shielded interrupter. Next I decded to upgrade to a half bridge of IRFP260N's 200v 50a. Basically, this is almost an exact copy of Steve's MiniSSTC. Unfortunately I haven't yet procured a second spool of 30awg, so I am currently using the 3.5" (9 cm) diameter x 8" (~20 cm) winding length secondary that I wound for the MicroSSTC. I found that spark length doubled with the addition of my John Freau 6 x 1.75" toroid. Currently my max output is about 5-6 inches (13 cm), but I expect longer sparks after I upgrade to a lower frequency secondary. I have only had this working for a couple days, so other tweaks will need to be made, such as optimizing coupling and number of primary turns.
Here is a picture of the system in its current incarnation, sitting up on my old 6" disruptive coil table. The other picture shows a braidlike bundle of sparks at high bps/prf. The best thing about having a coil like this is being able to vary the spark characteristics in real time via a remote interrupter.
Brett Miller, Wed Apr 04 2007, 09:34PM
Here is my second SSTC. It is basically the natural progression of my solid state path so far, that being the well traveled Steve Ward formula. I would like to thank Steve for taking time to answer my questions on many occations.
I built a version of his MicroSSTC, but used an isolated logic supply and built a remote shielded interrupter. Next I decded to upgrade to a half bridge of IRFP260N's 200v 50a. Basically, this is almost an exact copy of Steve's MiniSSTC. Unfortunately I haven't yet procured a second spool of 30awg, so I am currently using the 3.5" (9 cm) diameter x 8" (~20 cm) winding length secondary that I wound for the MicroSSTC. I found that spark length doubled with the addition of my John Freau 6 x 1.75" toroid. Currently my max output is about 5-6 inches (13 cm), but I expect longer sparks after I upgrade to a lower frequency secondary. I have only had this working for a couple days, so other tweaks will need to be made, such as optimizing coupling and number of primary turns.
Here is a picture of the system in its current incarnation, sitting up on my old 6" disruptive coil table. The other picture shows a braidlike bundle of sparks at high bps/prf. The best thing about having a coil like this is being able to vary the spark characteristics in real time via a remote interrupter.
Re: ** Add your Tesla coil here **
Brett Miller, Wed Apr 04 2007, 11:38PM
Here's my first SSTC. It's a very small ISSTC based on Steve's MicroSSTC. However, I made a few small but significant changes. I used the UCC37322 non inverting driver so I could use a remote interrupter. Also, I made the regulated 12v supply for the 555 and UCC seperate from the supply that powered the MOSFET so I could try running it off of any supply I felt like trying. This has been a lot of fun and a learning experience. The interrupter I built is similar to the one on the Class E SSTC that Steve shows on his schemtic, however, the only pots I had available at the time were two 100k audio tapers. Still, the interrupter provides a good range for both PRF and On-Time.
When I was doing the initial testing for this coil, the only resonator I had in the lab with an Fres low enough to achieve osciillation with this driver was my vttc secondary. It's 19" (~48 cm) of awg 26 on a 3.5" (9 cm) form. I got around 2.5" (6.5 cm) sparks with this secondary (air streamers with the interrupter, and pulled arcs in CW mode) using a 30v transformer rectified and smoothed with 6600uf. The cap that has given the most success is a panasonic poly 1600v .0033uf. I have tried several mosfets with more or less similar results: IRFP460, IRFP250, IRFP260N. This is a fun little driver and a great introduction to solid state coiling. Thanks and much credit to Steve Ward here.
-Brett
Brett Miller, Wed Apr 04 2007, 11:38PM
Here's my first SSTC. It's a very small ISSTC based on Steve's MicroSSTC. However, I made a few small but significant changes. I used the UCC37322 non inverting driver so I could use a remote interrupter. Also, I made the regulated 12v supply for the 555 and UCC seperate from the supply that powered the MOSFET so I could try running it off of any supply I felt like trying. This has been a lot of fun and a learning experience. The interrupter I built is similar to the one on the Class E SSTC that Steve shows on his schemtic, however, the only pots I had available at the time were two 100k audio tapers. Still, the interrupter provides a good range for both PRF and On-Time.
When I was doing the initial testing for this coil, the only resonator I had in the lab with an Fres low enough to achieve osciillation with this driver was my vttc secondary. It's 19" (~48 cm) of awg 26 on a 3.5" (9 cm) form. I got around 2.5" (6.5 cm) sparks with this secondary (air streamers with the interrupter, and pulled arcs in CW mode) using a 30v transformer rectified and smoothed with 6600uf. The cap that has given the most success is a panasonic poly 1600v .0033uf. I have tried several mosfets with more or less similar results: IRFP460, IRFP250, IRFP260N. This is a fun little driver and a great introduction to solid state coiling. Thanks and much credit to Steve Ward here.
-Brett
Re: ** Add your Tesla coil here **
Brett Miller, Thu Apr 05 2007, 02:31AM
Here is my first and only (so far) vttc, although it has been used as a platform to test several tubes now. It was originally designed to be a single 833A system, inspired by John Freau and Steve Ward to name just two of the many who have had great success with the robust 833.
In this picture I have the 813 installed with plate choke (I do not use one with the 833A).
I should also mention that the lexan ring around the top of the primary form actually came in handy on one occation and was first seen on one of Chris Hooper's tube coils. Also moving the feedback coil up to about the midpoint of the secondary winding has really helped tuning in quite a few configuraions, hence the longer than traditional primary form. In the picture above, you can see the RCA 833A socket still on the base of my vttc test stand. I have managed 21" sparks (at 60 pps -- no staccato) with both the 833A and 813 in this system. Recently I dropped in a 304tl and got 13" sparks with no tweaks to the system, but the plate was running very hot. A grid leak resistance change was almost certainly needed. Too busy with my SSTC projects lately.
Here's photo of the system managing around 20 plus inch (51 cm) sparks with a single 813 tube:
Specs:
-------
Secondary: 19" Winding length (AWG 26) 3.5" diameter PVC form
Topload: John Freau 6" x 1.75"
Primary: 28 turns AWG 12 stranded close wound on a 6" dia PVC 12" high...capped with lexan ring (the Hooper hoop).
Feedback: 25 turns AWG 23 magnet wire on a HDPE slideable form
Tank Cap: Two Yish doorknobs 1.1nf x 2 in parallel (50kv)
Grid Leak: 1.1nf yish (50kv) in parallel with 6k 50w power resistor
PSU: One large MOT...shunts removed, with 3uf MO cap doubler with 12x 1n5408 diodes with another doorknob for bypass.
This has been a very robust system. It's been a lot of fun even without staccato, which I plan on throwing together later this year sometime.
-Brett
Brett Miller, Thu Apr 05 2007, 02:31AM
Here is my first and only (so far) vttc, although it has been used as a platform to test several tubes now. It was originally designed to be a single 833A system, inspired by John Freau and Steve Ward to name just two of the many who have had great success with the robust 833.
In this picture I have the 813 installed with plate choke (I do not use one with the 833A).
I should also mention that the lexan ring around the top of the primary form actually came in handy on one occation and was first seen on one of Chris Hooper's tube coils. Also moving the feedback coil up to about the midpoint of the secondary winding has really helped tuning in quite a few configuraions, hence the longer than traditional primary form. In the picture above, you can see the RCA 833A socket still on the base of my vttc test stand. I have managed 21" sparks (at 60 pps -- no staccato) with both the 833A and 813 in this system. Recently I dropped in a 304tl and got 13" sparks with no tweaks to the system, but the plate was running very hot. A grid leak resistance change was almost certainly needed. Too busy with my SSTC projects lately.
Here's photo of the system managing around 20 plus inch (51 cm) sparks with a single 813 tube:
Specs:
-------
Secondary: 19" Winding length (AWG 26) 3.5" diameter PVC form
Topload: John Freau 6" x 1.75"
Primary: 28 turns AWG 12 stranded close wound on a 6" dia PVC 12" high...capped with lexan ring (the Hooper hoop).
Feedback: 25 turns AWG 23 magnet wire on a HDPE slideable form
Tank Cap: Two Yish doorknobs 1.1nf x 2 in parallel (50kv)
Grid Leak: 1.1nf yish (50kv) in parallel with 6k 50w power resistor
PSU: One large MOT...shunts removed, with 3uf MO cap doubler with 12x 1n5408 diodes with another doorknob for bypass.
This has been a very robust system. It's been a lot of fun even without staccato, which I plan on throwing together later this year sometime.
-Brett
Re: ** Add your Tesla coil here **
Brett Miller, Thu Apr 05 2007, 03:54AM
Here is my first TC. It was, of course, a disruptive coil.
This 6" coil was inspired first by the fact that at the time I was conceiving this project (around late 1999) I was highly influenced by the web page of German coiler Stefan Kluge, who also used a 30 degree primary for high coupling. In retrospect, I should have probably used a flat spiral configuration, nevertheless, I never had a single primary strike in spite of the lack of a strike ring. Over a period of several years, I used this system as a test bed and to make component comparisons. I even attempted to write a paper contrasting the performance of my TCBOR style static gap, with a multi mini static (quench) gap built by Terry Fritz which provided a 1st notch quench.
Specs:
Transformer: France 12/60 NST
Cap: Resonant .012uf (commercial caps and MMCs were tried....I prefer MMC)
Spark gap: TCBOR just like in the old R.Q. .doc file...1.5" cu pipe electrodes.
Primary: 14 turns 1/4" cu
Secondary: 6" diameter 24" winding length AWG 23 HPN Green Magnet Wire
ACR (lower toroid): 11.75" x 2.75"
Toroid: 4" x 17"
With the old Panasonic style MMC I got up to 45 inch streamers and arcs to ground, so I was right on my Freau number for 720va...of course back then I didn't have the nice amp clamp I have now, so in reality things may not have been so efficient as it sounds on paper.
Here's a spark photo:
I don't know if this will end up as scrap or not. If I built another disruptive coil I would like to have a secondary which boasts a lower Fres. Most of the tank circuit (transformer and caps) have been traded away and I'm using the stand (not shown in pic) as a table on which to solder my sstc projects. Such is progress I suppose.
Brett Miller, Thu Apr 05 2007, 03:54AM
Here is my first TC. It was, of course, a disruptive coil.
This 6" coil was inspired first by the fact that at the time I was conceiving this project (around late 1999) I was highly influenced by the web page of German coiler Stefan Kluge, who also used a 30 degree primary for high coupling. In retrospect, I should have probably used a flat spiral configuration, nevertheless, I never had a single primary strike in spite of the lack of a strike ring. Over a period of several years, I used this system as a test bed and to make component comparisons. I even attempted to write a paper contrasting the performance of my TCBOR style static gap, with a multi mini static (quench) gap built by Terry Fritz which provided a 1st notch quench.
Specs:
Transformer: France 12/60 NST
Cap: Resonant .012uf (commercial caps and MMCs were tried....I prefer MMC)
Spark gap: TCBOR just like in the old R.Q. .doc file...1.5" cu pipe electrodes.
Primary: 14 turns 1/4" cu
Secondary: 6" diameter 24" winding length AWG 23 HPN Green Magnet Wire
ACR (lower toroid): 11.75" x 2.75"
Toroid: 4" x 17"
With the old Panasonic style MMC I got up to 45 inch streamers and arcs to ground, so I was right on my Freau number for 720va...of course back then I didn't have the nice amp clamp I have now, so in reality things may not have been so efficient as it sounds on paper.
Here's a spark photo:
I don't know if this will end up as scrap or not. If I built another disruptive coil I would like to have a secondary which boasts a lower Fres. Most of the tank circuit (transformer and caps) have been traded away and I'm using the stand (not shown in pic) as a table on which to solder my sstc projects. Such is progress I suppose.
Re: ** Add your Tesla coil here **
Ken M., Sat Apr 07 2007, 07:14AM
Woot I did it!
Speccs:
Steve Wards Single Fet driver
Primary: 2 turns of 8AWG Positive car audio wire at 12v
Secondary: 8"X2" PVC pipe of 36AWG ~1400 turns
Fres: NO idea (Well fix later its 3am
Ken M., Sat Apr 07 2007, 07:14AM
Woot I did it!
Speccs:
Steve Wards Single Fet driver
Primary: 2 turns of 8AWG Positive car audio wire at 12v
Secondary: 8"X2" PVC pipe of 36AWG ~1400 turns
Fres: NO idea (Well fix later its 3am
Re: ** Add your Tesla coil here **
kywalda, Tue Apr 10 2007, 10:00AM
1m height SGTC
0.1 uF 40 KV tank cap
pri 10 turns of copper tube 12 mm
sec dia: 160 mm 1200 turns of 0.6 mm wire
hv source 4.5 KV 4KVA trafo with rectifying voltage doubler
sparcs about 2 m
kywalda, Tue Apr 10 2007, 10:00AM
1m height SGTC
0.1 uF 40 KV tank cap
pri 10 turns of copper tube 12 mm
sec dia: 160 mm 1200 turns of 0.6 mm wire
hv source 4.5 KV 4KVA trafo with rectifying voltage doubler
sparcs about 2 m
Re: ** Add your Tesla coil here **
Vaxian, Wed Apr 11 2007, 04:16AM
I am new to this site & forum.
I have been coiling for about 6 months, have built 3 coils so far, my favorite being my 813 VTTC.
It is built mostly from scrounged parts. The secondary is wound on part of a clown's balloon inflator scavenged from a dumpster behind a party store out of business. The only part I remember spending any real money for was the tank cap, a Spragur 2nf doorknob - $20.00 at a hamfest. The rest is all microwave parts and milsurp.
I have a 4.5" disruptive that is currently striking 36" to a grounded rod. It uses the other half of the balloon inflator for it's 4.5" secondary, a 12/60 NST, a 6 gap round spark gap, and a .01 mfd commercial cap. 36" so far, upgrading to a MMC soon, should increase the spark length.
Also a 3" (my first) OBIT powered coil. It uses an OBIT, 2 of the commercial caps in series, a 3" X 12" secondary, a 5 gap horizontal tube gap with an air blower to keep it from melting down.
You can get more info on my coils and myself at
Dan Williams aka Vaxian
Vaxian, Wed Apr 11 2007, 04:16AM
I am new to this site & forum.
I have been coiling for about 6 months, have built 3 coils so far, my favorite being my 813 VTTC.
It is built mostly from scrounged parts. The secondary is wound on part of a clown's balloon inflator scavenged from a dumpster behind a party store out of business. The only part I remember spending any real money for was the tank cap, a Spragur 2nf doorknob - $20.00 at a hamfest. The rest is all microwave parts and milsurp.
I have a 4.5" disruptive that is currently striking 36" to a grounded rod. It uses the other half of the balloon inflator for it's 4.5" secondary, a 12/60 NST, a 6 gap round spark gap, and a .01 mfd commercial cap. 36" so far, upgrading to a MMC soon, should increase the spark length.
Also a 3" (my first) OBIT powered coil. It uses an OBIT, 2 of the commercial caps in series, a 3" X 12" secondary, a 5 gap horizontal tube gap with an air blower to keep it from melting down.
You can get more info on my coils and myself at
Dan Williams aka Vaxian
Re: ** Add your Tesla coil here **
Vaxian, Sun Apr 15 2007, 05:57AM
First Light occurred tonight!
This is my 3C24 Triode Mini VTTC
The coil is build on a plastic base with Lexan sides and top
Small unshunted MOT with a 12V winding for the fan PS
The Secondary is 500 turns ot Microwave fan wire on a spice shaker.
Plate cap is a .000009 Mica
Grid resistor is 3K at 50 watts
Heater supply is external, been using a 6V battery until I find or build a supply.
Overall dimensions are 13" from bottom to top of ball, and 6X6"
Got 1" of brushed discharge without any tuning of the primary.
More work to come. including trim and a lighted on off switch to go with the fan.
Plan an a new secondary as soon as I get some finer wire, the spice shaker screws into it's top so that I can wind several secondaries and easily change them out. And the spices are a buck a pop and there's a few in the cuboard suspect for replacement!
Have some finishing work, noticed my gridleak resistor is lopsided, the top dosn't sit on straight because of tension in some wires, etc.
She does work though!
Will keep you all updated when I tune her up.
Vaxian, Sun Apr 15 2007, 05:57AM
First Light occurred tonight!
This is my 3C24 Triode Mini VTTC
The coil is build on a plastic base with Lexan sides and top
Small unshunted MOT with a 12V winding for the fan PS
The Secondary is 500 turns ot Microwave fan wire on a spice shaker.
Plate cap is a .000009 Mica
Grid resistor is 3K at 50 watts
Heater supply is external, been using a 6V battery until I find or build a supply.
Overall dimensions are 13" from bottom to top of ball, and 6X6"
Got 1" of brushed discharge without any tuning of the primary.
More work to come. including trim and a lighted on off switch to go with the fan.
Plan an a new secondary as soon as I get some finer wire, the spice shaker screws into it's top so that I can wind several secondaries and easily change them out. And the spices are a buck a pop and there's a few in the cuboard suspect for replacement!
Have some finishing work, noticed my gridleak resistor is lopsided, the top dosn't sit on straight because of tension in some wires, etc.
She does work though!
Will keep you all updated when I tune her up.
Re: ** Add your Tesla coil here **
Duncan, Sat Apr 21 2007, 04:43AM
Here's my new SGTC. It runs from a 7.5kV 25mA NST, has a 0.0106uF 13.5kV MMC and a tungsten carbide static gap. Current streamer length with small topload is 40cm (16")
Duncan.
Duncan, Sat Apr 21 2007, 04:43AM
Here's my new SGTC. It runs from a 7.5kV 25mA NST, has a 0.0106uF 13.5kV MMC and a tungsten carbide static gap. Current streamer length with small topload is 40cm (16")
Duncan.
Re: ** Add your Tesla coil here **
Dalus, Wed Apr 25 2007, 02:41PM
Here's my first coil. It's based on Steve Ward's mini sstc.
The set-up.
And some sparks.
Dalus, Wed Apr 25 2007, 02:41PM
Here's my first coil. It's based on Steve Ward's mini sstc.
The set-up.
And some sparks.
Re: ** Add your Tesla coil here **
Shaun, Thu May 17 2007, 01:38AM
THE SLESSLA COIL!
This is my first Tesla Coil, but definitely not my last. Building it was a challenge but fun, and totally worth it.
It's an SGTC, secondary 930 turns 24 awg on 4 inch thin wall PVC. Primary coil is 13 turns 30 degree inverse conical, tuned at 12 turns. Power is a 15kv/30ma NST. Tank capacitor is a 22.4 kV, 7.5 nF MMC. The part I'm least proud of is the topload, it's Al foil on dryer duct, 4" minor diameter, 16" overall. I'm gonna need to build a smoother one soon.
Also, the spark gap is just two galv iron screws in a 1.5" PVC endcap, with no quenching. It's really starting to eat through the screws.
It can get about 18" arcs to a grounded object, and when it's running it's very loud and very scary, just like it should be.
Here's a pic of the entire setup:
Some arcing to a grounded screwdriver:
Here are the total specs via JAVATC:
]1179365482_690_FT14_slessla_coil- javatc.txt[/file]
And links to the YouTube videos:
Video 1
Video 2
Shaun, Thu May 17 2007, 01:38AM
THE SLESSLA COIL!
This is my first Tesla Coil, but definitely not my last. Building it was a challenge but fun, and totally worth it.
It's an SGTC, secondary 930 turns 24 awg on 4 inch thin wall PVC. Primary coil is 13 turns 30 degree inverse conical, tuned at 12 turns. Power is a 15kv/30ma NST. Tank capacitor is a 22.4 kV, 7.5 nF MMC. The part I'm least proud of is the topload, it's Al foil on dryer duct, 4" minor diameter, 16" overall. I'm gonna need to build a smoother one soon.
Also, the spark gap is just two galv iron screws in a 1.5" PVC endcap, with no quenching. It's really starting to eat through the screws.
It can get about 18" arcs to a grounded object, and when it's running it's very loud and very scary, just like it should be.
Here's a pic of the entire setup:
Some arcing to a grounded screwdriver:
Here are the total specs via JAVATC:
]1179365482_690_FT14_slessla_coil- javatc.txt[/file]
And links to the YouTube videos:
Video 1
Video 2
Re: ** Add your Tesla coil here **
uzzors2k, Thu Sept 06 2007, 02:20PM
Table top SGTC
This was my first Tesla coil, completed in March this year. It was meant as a concept coil, so I could get the feel of things before scaling up. (plus being on a HV forum for a few years an never building a TC is sort of weird. ) Due to it's compact design it could be used as a desk ornament, if it didn't look like crap. The HV transformer is a rewound ATX core, run by a simple 555 driver, at 12V, flyback mode. Primary capacitor is ca. 440pF, so this thing really screeches. The spark gap is enclosed and muffled. The secondary is 1.5 cm in diameter, and consists of about 500 turns IIRC.
More pics and info here.
uzzors2k, Thu Sept 06 2007, 02:20PM
Table top SGTC
This was my first Tesla coil, completed in March this year. It was meant as a concept coil, so I could get the feel of things before scaling up. (plus being on a HV forum for a few years an never building a TC is sort of weird. ) Due to it's compact design it could be used as a desk ornament, if it didn't look like crap. The HV transformer is a rewound ATX core, run by a simple 555 driver, at 12V, flyback mode. Primary capacitor is ca. 440pF, so this thing really screeches. The spark gap is enclosed and muffled. The secondary is 1.5 cm in diameter, and consists of about 500 turns IIRC.
More pics and info here.
Re: ** Add your Tesla coil here **
Dr. Drone, Thu Sept 06 2007, 04:37PM
Dr. Drone, Thu Sept 06 2007, 04:37PM
Re: ** Add your Tesla coil here **
Dr. Drone, Thu Sept 06 2007, 07:55PM
Dr. Drone, Thu Sept 06 2007, 07:55PM
Re: ** Add your Tesla coil here **
Dr. Drone, Fri Sept 07 2007, 07:32PM
Dr. Drone, Fri Sept 07 2007, 07:32PM
Re: ** Add your Tesla coil here **
Dr. Drone, Mon Sept 10 2007, 08:40PM
Dr. Drone, Mon Sept 10 2007, 08:40PM
Re: ** Add your Tesla coil here **
Zum Beispiel, Tue Sept 25 2007, 05:01PM
My first tesla coil. Same type of coil as Steve Ward's MicroSSTC. Not a great sparkshow, but good for lighting up fluorescent lights.
Zum Beispiel, Tue Sept 25 2007, 05:01PM
My first tesla coil. Same type of coil as Steve Ward's MicroSSTC. Not a great sparkshow, but good for lighting up fluorescent lights.
Re: ** Add your Tesla coil here **
Zum Beispiel, Tue Sept 25 2007, 05:07PM
My bigger SSTC, I call him Mark II.
Halfbridge of IRFP450's and halfwave rectified 230V mains input. Input power around 1kW, streamers up to 30cm. Secondary resonant frequency is 260kHz with a 16cm x 5cm toroid.
Added some NaCl to the breakout point for the yellow spark.
Zum Beispiel, Tue Sept 25 2007, 05:07PM
My bigger SSTC, I call him Mark II.
Halfbridge of IRFP450's and halfwave rectified 230V mains input. Input power around 1kW, streamers up to 30cm. Secondary resonant frequency is 260kHz with a 16cm x 5cm toroid.
Added some NaCl to the breakout point for the yellow spark.
Re: ** Add your Tesla coil here **
Zonalklism, Tue Oct 16 2007, 11:06PM
Here's my second sgtc.
SPECS:
Transformer - 12000v, 30ma
Primary - ~5 turns of 1/4in copper tube
Secondary - ~800 turns of 28ga copper wire
Capacitor - .66 nf (I think) mmc
(And yes, I know the last pic is insanely dangerous, but I live life on the electrical EDGE!)
Zonalklism, Tue Oct 16 2007, 11:06PM
Here's my second sgtc.
SPECS:
Transformer - 12000v, 30ma
Primary - ~5 turns of 1/4in copper tube
Secondary - ~800 turns of 28ga copper wire
Capacitor - .66 nf (I think) mmc
(And yes, I know the last pic is insanely dangerous, but I live life on the electrical EDGE!)
Re: ** Add your Tesla coil here **
Dr. Dark Current, Thu Oct 25 2007, 07:09PM
I'l add my "beauty"...
My first (working) SSTC
Specs
Driver: antenna feedback w/ start-up osc.
Bridge: IRF740 halfbridge w/ halfwave rectification
Primary: 12 turns on ~11cm plastic pipe
Secondary: 8.5cm dia. 25cm winding length of unknown turns (0.17mm wire from old relay)
Sparks: just below 20cm (8") maximum. This is as far as I dare to go with the little fets, next step is to double them up for more power (still cheaper than IRFP460's)
Dr. Dark Current, Thu Oct 25 2007, 07:09PM
I'l add my "beauty"...
My first (working) SSTC
Specs
Driver: antenna feedback w/ start-up osc.
Bridge: IRF740 halfbridge w/ halfwave rectification
Primary: 12 turns on ~11cm plastic pipe
Secondary: 8.5cm dia. 25cm winding length of unknown turns (0.17mm wire from old relay)
Sparks: just below 20cm (8") maximum. This is as far as I dare to go with the little fets, next step is to double them up for more power (still cheaper than IRFP460's)
Re: ** Add your Tesla coil here **
Crow187, Tue Nov 13 2007, 05:15PM
Here is my first Coil I ever built.
A powered with 4 OBITs(10KV, 20mA each), 24nF primary cap, and tripple static gap.
About 70cm output.
Crow187, Tue Nov 13 2007, 05:15PM
Here is my first Coil I ever built.
A powered with 4 OBITs(10KV, 20mA each), 24nF primary cap, and tripple static gap.
About 70cm output.
Re: ** Add your Tesla coil here **
Crow187, Tue Nov 13 2007, 05:20PM
This is my second coil:
It is a rebuid of a coil from "Reaching".
Halfbridge with two IRFP460, halfwave rectifyed from 230V.
Output 20cm sometimes 25cm ;)
Crow187, Tue Nov 13 2007, 05:20PM
This is my second coil:
It is a rebuid of a coil from "Reaching".
Halfbridge with two IRFP460, halfwave rectifyed from 230V.
Output 20cm sometimes 25cm ;)
Re: ** Add your Tesla coil here **
Crow187, Tue Nov 13 2007, 05:33PM
My third coil I build was this DRSSTC.
It has a fullbridge with G4PC50U IGBTs.
It has secondary feedback and a 60nF 5kV cap.
Frequency about 300KHz.
Output good 90cm
Here it lights up a piece of wood =)
Crow187, Tue Nov 13 2007, 05:33PM
My third coil I build was this DRSSTC.
It has a fullbridge with G4PC50U IGBTs.
It has secondary feedback and a 60nF 5kV cap.
Frequency about 300KHz.
Output good 90cm
Here it lights up a piece of wood =)
Re: ** Add your Tesla coil here **
Derek_L, Fri Nov 16 2007, 09:28PM
Halloween 2007
Featuring Version I Coil 15kv/30ma
And 8 Foot Jacobs Ladder 15kv/120ma
Hope no one gets pissed that I posted a Ladder in here :P
Take care,
Derek L
Derek_L, Fri Nov 16 2007, 09:28PM
Halloween 2007
Featuring Version I Coil 15kv/30ma
And 8 Foot Jacobs Ladder 15kv/120ma
Hope no one gets pissed that I posted a Ladder in here :P
Take care,
Derek L
Re: ** Add your Tesla coil here **
Linas, Mon Nov 26 2007, 05:30AM
SSTC 342KHz, half-bridge, with FDH44N50 mosfets, runs on 600-800W,
spark lenght is almost 30cm in big secundary, wich burns under my test....
now i using small secundary :(
Linas, Mon Nov 26 2007, 05:30AM
SSTC 342KHz, half-bridge, with FDH44N50 mosfets, runs on 600-800W,
spark lenght is almost 30cm in big secundary, wich burns under my test....
now i using small secundary :(
Re: ** Add your Tesla coil here **
teslacoolguy, Fri Dec 07 2007, 09:08PM
My first spark gap tesla coil. It is powered by a 7.5kv nst and a 50nf at 10kv mmc. the max spark is about 3.5" with 4" streamers to a grounded object
teslacoolguy, Fri Dec 07 2007, 09:08PM
My first spark gap tesla coil. It is powered by a 7.5kv nst and a 50nf at 10kv mmc. the max spark is about 3.5" with 4" streamers to a grounded object
Re: ** Add your Tesla coil here **
KresoLiubov, Tue Dec 18 2007, 08:48PM
SGTC
Made by me for display in Nikola Teslas birth house in Smiljan:
Secondary: 160 mm, 1000 turns of 0.1 mm double insulated HV wire
Primary: 6 mm copper wire
Capacitors: Maxwell X 4
HV transformer: Custom made 10 kV 100 mA
Spark gap: Series copper pipes
I replicated one more exactly same for History museum of Croatia. Spark length 1.5 m. Foirst one operate for more than one year where visitors turn it ON and OFF as much they want without any fails.
KresoLiubov, Tue Dec 18 2007, 08:48PM
SGTC
Made by me for display in Nikola Teslas birth house in Smiljan:
Secondary: 160 mm, 1000 turns of 0.1 mm double insulated HV wire
Primary: 6 mm copper wire
Capacitors: Maxwell X 4
HV transformer: Custom made 10 kV 100 mA
Spark gap: Series copper pipes
I replicated one more exactly same for History museum of Croatia. Spark length 1.5 m. Foirst one operate for more than one year where visitors turn it ON and OFF as much they want without any fails.
Re: ** Add your Tesla coil here **
KresoLiubov, Tue Dec 18 2007, 08:53PM
One of many SSTC-s.
TL494 driven
KresoLiubov, Tue Dec 18 2007, 08:53PM
One of many SSTC-s.
TL494 driven
Re: ** Add your Tesla coil here **
KresoLiubov, Tue Dec 18 2007, 08:58PM
Feedback SSTC
KresoLiubov, Tue Dec 18 2007, 08:58PM
Feedback SSTC
Re: ** Add your Tesla coil here **
KresoLiubov, Tue Dec 18 2007, 08:59PM
Edit: I just counted more than 30 documented so i will not post photos of all
KresoLiubov, Tue Dec 18 2007, 08:59PM
KresoLiubov wrote ...
One of many SSTC-s.
TL494 driven
One of many SSTC-s.
TL494 driven
Edit: I just counted more than 30 documented so i will not post photos of all
Re: ** Add your Tesla coil here **
uzzors2k, Wed Dec 19 2007, 07:06PM
My first working SSTC. Based on Steve Conner's PLL driver, runs from half-wave rectified mains, secondary fres 500kHz, secondary height = 20cm. Needs primary tuning, but I consider it complete for the time being.
uzzors2k, Wed Dec 19 2007, 07:06PM
My first working SSTC. Based on Steve Conner's PLL driver, runs from half-wave rectified mains, secondary fres 500kHz, secondary height = 20cm. Needs primary tuning, but I consider it complete for the time being.
Re: ** Add your Tesla coil here **
bluemotion, Sat Jan 05 2008, 12:25PM
My first SSTC, it's basically Steve's Micro SSTC, but I replace the TC4420 with UCC37322 and add an interrupter. The interrupter is the same as the one used in Steve's Class-E.
It runs from a 30VDC, secondary frequency is unknown yet.(taken from my old SGTC) Topload is a stainless steel sphere(2inches in radius). With interrupter, streamers reach 4cm while IRFP460 staying cold.
]1199535336_1200_FT14_mov00139.avi[/file]
bluemotion, Sat Jan 05 2008, 12:25PM
My first SSTC, it's basically Steve's Micro SSTC, but I replace the TC4420 with UCC37322 and add an interrupter. The interrupter is the same as the one used in Steve's Class-E.
It runs from a 30VDC, secondary frequency is unknown yet.(taken from my old SGTC) Topload is a stainless steel sphere(2inches in radius). With interrupter, streamers reach 4cm while IRFP460 staying cold.
]1199535336_1200_FT14_mov00139.avi[/file]
Re: ** Add your Tesla coil here **
Ultra7, Fri Jan 11 2008, 11:34PM
This is My SGTC.
4 Inch Primary wound for 18 inches.
7500V/30mA NST
.0107uF Cap using 14 .15uF/2000V CD Snubber caps
Primary is 3/8 in tubing with 1/2 in spacing.
Toroid is El Cheapo Hobby store styrafoam donut covered with Al Tape.
Ultra7, Fri Jan 11 2008, 11:34PM
This is My SGTC.
4 Inch Primary wound for 18 inches.
7500V/30mA NST
.0107uF Cap using 14 .15uF/2000V CD Snubber caps
Primary is 3/8 in tubing with 1/2 in spacing.
Toroid is El Cheapo Hobby store styrafoam donut covered with Al Tape.
Re: ** Add your Tesla coil here **
bluemotion, Sat Jan 12 2008, 01:41PM
My first half bridge SSTC. It's almost the same as Steve W's MiniSSTC. However I use 2 ucc37322s since I only have them.
It runs on full wave 110v main.
I am still using the secondary wound for my last MicroSSTC, it's 19cm in height.(30 cm with breakout point; 41cm with stainless steel sphere)
secondary freq is around 615khz
When using a sphere as topload, sparks reach 14cm.
]1200145265_1200_FT14_mov00158.avi[/file]
bluemotion, Sat Jan 12 2008, 01:41PM
My first half bridge SSTC. It's almost the same as Steve W's MiniSSTC. However I use 2 ucc37322s since I only have them.
It runs on full wave 110v main.
I am still using the secondary wound for my last MicroSSTC, it's 19cm in height.(30 cm with breakout point; 41cm with stainless steel sphere)
secondary freq is around 615khz
When using a sphere as topload, sparks reach 14cm.
]1200145265_1200_FT14_mov00158.avi[/file]
Re: ** Add your Tesla coil here **
Alexandre, Tue Jan 15 2008, 02:26AM
My 4 inch coil, powered 4 MOT, in series, 25nF cap bank, RSG with 6000 RPM.
Spark length 42" Coil in ajusted
Alexandre, Tue Jan 15 2008, 02:26AM
My 4 inch coil, powered 4 MOT, in series, 25nF cap bank, RSG with 6000 RPM.
Spark length 42" Coil in ajusted
Re: ** Add your Tesla coil here **
MRacerxdl, Tue Jan 15 2008, 03:19AM
My 150W SGTC:
Cap Bank - 10nF 6400V
Xfrmr - 5kV 30mA
Primary - 9 Turn with 7cm In Diameter.
Two Secondaries: One with the primary (800 Turns arround ~2.2' (5.9cm)) and secondary at free air with 1000 turns arround 2'.
Topload - The Free Air coil has a block of aluminium with a iron bar pointing to other topload. On the other secondary there is a pvc cilinder with Aluminium foil arround.
Sparks: 20cm
The free air secondary coil low side (in the beginning of the coil) is wired with the low side of the other coil. A different bipolar coil :P
(Thats is not a good work, I making a new one)
MRacerxdl, Tue Jan 15 2008, 03:19AM
My 150W SGTC:
Cap Bank - 10nF 6400V
Xfrmr - 5kV 30mA
Primary - 9 Turn with 7cm In Diameter.
Two Secondaries: One with the primary (800 Turns arround ~2.2' (5.9cm)) and secondary at free air with 1000 turns arround 2'.
Topload - The Free Air coil has a block of aluminium with a iron bar pointing to other topload. On the other secondary there is a pvc cilinder with Aluminium foil arround.
Sparks: 20cm
The free air secondary coil low side (in the beginning of the coil) is wired with the low side of the other coil. A different bipolar coil :P
(Thats is not a good work, I making a new one)
Re: ** Add your Tesla coil here **
Wirenut, Sat Jan 19 2008, 07:53AM
Here is my miniBrute based DRSSTC putting out 48" sparks
power is from a half-bridge of hgt1n40n60a4d igbts
toroid is a John Freau 4x13
Wirenut, Sat Jan 19 2008, 07:53AM
Here is my miniBrute based DRSSTC putting out 48" sparks
power is from a half-bridge of hgt1n40n60a4d igbts
toroid is a John Freau 4x13
Re: ** Add your Tesla coil here **
Alexandre, Mon Feb 04 2008, 02:37AM
Tesla Coil
Cap - 5.2nF @ 14400V (9 in series 47nF @ 1600V)
Primary - 12 turns
Power - NST 8Kv @ 30mA
Static Spark gap - 4 tubs of cooper
Streamers - 20cm
Enjoy
Alexandre, Mon Feb 04 2008, 02:37AM
Tesla Coil
Cap - 5.2nF @ 14400V (9 in series 47nF @ 1600V)
Primary - 12 turns
Power - NST 8Kv @ 30mA
Static Spark gap - 4 tubs of cooper
Streamers - 20cm
Enjoy
Re: ** Add your Tesla coil here **
Alexandre, Mon Feb 04 2008, 02:50AM
Mini Tesla Coil
Cap - 1nF @ 20kV
Primary - 9 turns
Secondary - #37 in 20cm
Power - NST 8kV @ 30mA
Streamers - 7cm
enjoy
Alexandre, Mon Feb 04 2008, 02:50AM
Mini Tesla Coil
Cap - 1nF @ 20kV
Primary - 9 turns
Secondary - #37 in 20cm
Power - NST 8kV @ 30mA
Streamers - 7cm
enjoy
Re: ** Add your Tesla coil here **
Hrothgar, Sun Feb 17 2008, 11:25PM
This is Ghettor 98, being consisting of nearly 98% blood and rage, it is fully capable of burning out fuses and emptying my wallet. The coil is made of stools, tangerine boxes, cardboard, and duct tape, the contraption produces 2 foot long streamers in a pleasing ultraviolet tone.
Hrothgar, Sun Feb 17 2008, 11:25PM
This is Ghettor 98, being consisting of nearly 98% blood and rage, it is fully capable of burning out fuses and emptying my wallet. The coil is made of stools, tangerine boxes, cardboard, and duct tape, the contraption produces 2 foot long streamers in a pleasing ultraviolet tone.
Re: ** Add your Tesla coil here **
Arcstarter, Thu Feb 21 2008, 04:45PM
The sparks are not huge but i have a little better performance now.
primary is currently 27 turns
feedback is 24 turns
i used one unballasted MOT
secondary is 900 turns of about 28-30 gauge
large sharpened nail breakout point
Arcstarter, Thu Feb 21 2008, 04:45PM
The sparks are not huge but i have a little better performance now.
primary is currently 27 turns
feedback is 24 turns
i used one unballasted MOT
secondary is 900 turns of about 28-30 gauge
large sharpened nail breakout point
Re: ** Add your Tesla coil here **
Ken M., Thu Feb 28 2008, 11:14PM
My rendition on Steve Wards mini SSTC.
Driver: 555 interupted with CT feedback
Power tronics: Half-bridge of IRFP260 and 750nF caps
Primary: 4 turns of 8AWG wire
Secondary: 4"X20" 30AWG enamled wire on PVC pipe
Arc length w\o toroid: ~6"
with toroid: ~9"
Fres:325KHz
Ken M., Thu Feb 28 2008, 11:14PM
My rendition on Steve Wards mini SSTC.
Driver: 555 interupted with CT feedback
Power tronics: Half-bridge of IRFP260 and 750nF caps
Primary: 4 turns of 8AWG wire
Secondary: 4"X20" 30AWG enamled wire on PVC pipe
Arc length w\o toroid: ~6"
with toroid: ~9"
Fres:325KHz
Re: ** Add your Tesla coil here **
uzzors2k, Sat Mar 15 2008, 09:23AM
My palm-top class E coil. With interrupter and audio-modulation. Feedback provided by CT. Draws approximately 80W from 50V supply.
Driver: 4046 PLL driver
Secondary: ~0.2mm on 5 * 8 cm former
Fres: 1.38MHz
Project thread.
uzzors2k, Sat Mar 15 2008, 09:23AM
My palm-top class E coil. With interrupter and audio-modulation. Feedback provided by CT. Draws approximately 80W from 50V supply.
Driver: 4046 PLL driver
Secondary: ~0.2mm on 5 * 8 cm former
Fres: 1.38MHz
Project thread.
Re: ** Add your Tesla coil here **
Mates, Sun Apr 13 2008, 12:04AM
Single switch tl494 driven coil...(my own design)
Primary: 6turns
Sec: 1300turns (height 50cm)
Freq: 170 KHz
Transistor: BUP314 (two in parallel)
Power consumption: regulatable by changing number of caps in the circuit. Max power tested approx. 2KW (5minutes)
Streamers length: Approx. 40cm at 2KW
Mates, Sun Apr 13 2008, 12:04AM
Single switch tl494 driven coil...(my own design)
Primary: 6turns
Sec: 1300turns (height 50cm)
Freq: 170 KHz
Transistor: BUP314 (two in parallel)
Power consumption: regulatable by changing number of caps in the circuit. Max power tested approx. 2KW (5minutes)
Streamers length: Approx. 40cm at 2KW
Re: ** Add your Tesla coil here **
EvanLAB, Mon May 05 2008, 06:00AM
Hello all! This is my first post on this beautiful forum! I live in central part of siberia and go in for TC building. Let introduce one of my first humble mini SGTC. It was made in last summer.
Technical data:
Prim.coil: 2,5 turn of copper pipe (D=6mm) on framework of 220mm diameter.
Sec.coil: 1944 turn (wire d=0,18mm) on plastic pipe of 50mm diameter.
Toroid: sphere of 53mm diameter.
Frequency: LC-resonance (of sec.coil) is 380,34kHz.
MMC: 18800pF/ 12kV of ceramics capacitors.
Spark gap: static
HV transformer: an old russian NST without magnetic shunts. 220V/ 10kV, 100mA (on short circuit).
EvanLAB, Mon May 05 2008, 06:00AM
Hello all! This is my first post on this beautiful forum! I live in central part of siberia and go in for TC building. Let introduce one of my first humble mini SGTC. It was made in last summer.
Technical data:
Prim.coil: 2,5 turn of copper pipe (D=6mm) on framework of 220mm diameter.
Sec.coil: 1944 turn (wire d=0,18mm) on plastic pipe of 50mm diameter.
Toroid: sphere of 53mm diameter.
Frequency: LC-resonance (of sec.coil) is 380,34kHz.
MMC: 18800pF/ 12kV of ceramics capacitors.
Spark gap: static
HV transformer: an old russian NST without magnetic shunts. 220V/ 10kV, 100mA (on short circuit).
Re: ** Add your Tesla coil here **
dingo27, Mon May 05 2008, 07:15AM
mini SGTC, running from 12V with flyback circuit (2n3055) and HV transformer from CRT,
resonance is somewhere between 1-2MHz
resonant capacitors are 3,13nF (i think) at 6kV
sparks are 1.5 cm long, but need a little bit of tweaking spark gap,
sparks are not getting to air by themselfs, but perfecly fly to human objeck (like me :), and beautiful corona is around toroid (but i am not able to capture it because of my photocamera)
dingo27, Mon May 05 2008, 07:15AM
mini SGTC, running from 12V with flyback circuit (2n3055) and HV transformer from CRT,
resonance is somewhere between 1-2MHz
resonant capacitors are 3,13nF (i think) at 6kV
sparks are 1.5 cm long, but need a little bit of tweaking spark gap,
sparks are not getting to air by themselfs, but perfecly fly to human objeck (like me :), and beautiful corona is around toroid (but i am not able to capture it because of my photocamera)
Re: ** Add your Tesla coil here **
EvanLAB, Thu May 22 2008, 09:10AM
Hello all! Fortunately, the building of my touring SGTC is coming to the end, and now I can show some pictures.
Technical data:
Prim.coil: 8 turn of copper pipe (D=16mm) 670 mm external diameter.
Sec.coil: 2000 turn (wire d=0,4mm) on carton pipe of 130mm diameter.(height 900mm)
Toroid: 380mm external diameter of vent duct 150мм diameter.
Frequency: LC resonance (of sec.coil) is 108,76kHz.
MMC: ceramics capacitors stack 117,5nF/ 12kV.
Spark gap: custom construction RSG. BPS(max.)=1466 Hz.
HV power supply: double-MOT stack.
Streamers length: approximately (average) 1,2…1,3m/ (max.) 1,5…1,8m.
]shorty.mpg[/file]
EvanLAB, Thu May 22 2008, 09:10AM
Hello all! Fortunately, the building of my touring SGTC is coming to the end, and now I can show some pictures.
Technical data:
Prim.coil: 8 turn of copper pipe (D=16mm) 670 mm external diameter.
Sec.coil: 2000 turn (wire d=0,4mm) on carton pipe of 130mm diameter.(height 900mm)
Toroid: 380mm external diameter of vent duct 150мм diameter.
Frequency: LC resonance (of sec.coil) is 108,76kHz.
MMC: ceramics capacitors stack 117,5nF/ 12kV.
Spark gap: custom construction RSG. BPS(max.)=1466 Hz.
HV power supply: double-MOT stack.
Streamers length: approximately (average) 1,2…1,3m/ (max.) 1,5…1,8m.
]shorty.mpg[/file]
Re: ** Add your Tesla coil here **
TeslaCommander, Thu May 29 2008, 10:54AM
Hey guys, im new here and wanted to show my first sstc here, and see what u guys think of it.
specs:
------------------------------------- ---------------
Type TC:
Audio Modulated Solid State TeslaCoil (AMSSTC)
---------------------------------------- ------------
Supply:
Current = varabel tot 2A
Voltage = 0-270VAC
Vermogen = max 500 W
---------------------------------------------- ------
Primair:
Helinx
Diameter = 110 mm
Height = 21 mm
windings = 7.0
Wire = 3.0 mm coated coilwire
Total length = 242 cm
Resistance = 0.019 Ohm
Inductivity = 8.7uH
------------------------------------------- ---------
Secundaire:
Diameter = 80 mm
height = 179 mm
Turns = 745
wire = 0.24 mm
Total length = 190 m
Resistance = 101.19 Ohm
Inductivity = 15.5mH
Resonance frequentie ( 1/4 Labda ) = 400 KHz
-------------------------------------------- --------
Topload:
Aluminum toroid 100 x 30mm
Spike 27mm high 18 mm wide
-------------------------------------------- --------
Capacitor:
polypropyleen film capacitor 0.68uF 400V
-------------------------------------------- --------
Streamers:
to ground = 15 cm
output voltage = max 130.000V
----------------------------------------------- --------------
and a youtube link to one of the first audiotests: http://www.youtube.com/watch?v=UgoatBLl8z8&eurl=http://www.megavolts.nl/teslacoil/tesla_4/index.html
and a few other TC's of me in the order i made them:
TeslaCommander, Thu May 29 2008, 10:54AM
Hey guys, im new here and wanted to show my first sstc here, and see what u guys think of it.
specs:
------------------------------------- ---------------
Type TC:
Audio Modulated Solid State TeslaCoil (AMSSTC)
---------------------------------------- ------------
Supply:
Current = varabel tot 2A
Voltage = 0-270VAC
Vermogen = max 500 W
---------------------------------------------- ------
Primair:
Helinx
Diameter = 110 mm
Height = 21 mm
windings = 7.0
Wire = 3.0 mm coated coilwire
Total length = 242 cm
Resistance = 0.019 Ohm
Inductivity = 8.7uH
------------------------------------------- ---------
Secundaire:
Diameter = 80 mm
height = 179 mm
Turns = 745
wire = 0.24 mm
Total length = 190 m
Resistance = 101.19 Ohm
Inductivity = 15.5mH
Resonance frequentie ( 1/4 Labda ) = 400 KHz
-------------------------------------------- --------
Topload:
Aluminum toroid 100 x 30mm
Spike 27mm high 18 mm wide
-------------------------------------------- --------
Capacitor:
polypropyleen film capacitor 0.68uF 400V
-------------------------------------------- --------
Streamers:
to ground = 15 cm
output voltage = max 130.000V
----------------------------------------------- --------------
and a youtube link to one of the first audiotests: http://www.youtube.com/watch?v=UgoatBLl8z8&eurl=http://www.megavolts.nl/teslacoil/tesla_4/index.html
and a few other TC's of me in the order i made them:
Re: ** Add your Tesla coil here **
omegalabs, Thu Jun 05 2008, 11:24AM
4 MOT Tesla Coil. Details:
AC Tesla Coil desing
rotary spark gap @ 400bps ~ max bps 1333 (asynchron)
homemade rolled poliethylene capacitor 56nF @ 20kV
secondary diameter: 7.8'' (200mm)
secondary turns 800
power supply: 4 mots in series 8,4kVAC
Frequency about 100kHz
Spark lenght 60'' = 1,50m (the prior version)
Video:
Spark picture :
Faraday cage picture :
Building the new version:
Mounting :
The 'variac box' (contains 1kVA and 6kVA variac):
The spark gap with 4mm diameter tungsten electrodes:
Some picture out of the Faraday cage:
A youtube video:
The output voltage is about 411kV (spark lenght 180cm, 70'')
My VTTC with GU-81M:
CW operation:
Video 1 :
Video 2 :
omegalabs, Thu Jun 05 2008, 11:24AM
4 MOT Tesla Coil. Details:
AC Tesla Coil desing
rotary spark gap @ 400bps ~ max bps 1333 (asynchron)
homemade rolled poliethylene capacitor 56nF @ 20kV
secondary diameter: 7.8'' (200mm)
secondary turns 800
power supply: 4 mots in series 8,4kVAC
Frequency about 100kHz
Spark lenght 60'' = 1,50m (the prior version)
Video:
Spark picture :
Faraday cage picture :
Building the new version:
Mounting :
The 'variac box' (contains 1kVA and 6kVA variac):
The spark gap with 4mm diameter tungsten electrodes:
Some picture out of the Faraday cage:
A youtube video:
The output voltage is about 411kV (spark lenght 180cm, 70'')
My VTTC with GU-81M:
CW operation:
Video 1 :
Video 2 :
Re: ** Add your Tesla coil here **
Avenger, Wed Jun 18 2008, 05:50AM
My small VTTC, constructed one year ago. It is small, but gives 22-23 cm of a spark. Tube GK-71 (125w on the plate)
Secondary coil: 900 turn (wire 0,224mm) on PVC of 50mm diameter (height 220mm).
Primary is 22 turns of 0.7мм wire, feedback 20 turns.
MMC = 330 pf of ceramic caps
One MOT without voltage doubler
Avenger, Wed Jun 18 2008, 05:50AM
My small VTTC, constructed one year ago. It is small, but gives 22-23 cm of a spark. Tube GK-71 (125w on the plate)
Secondary coil: 900 turn (wire 0,224mm) on PVC of 50mm diameter (height 220mm).
Primary is 22 turns of 0.7мм wire, feedback 20 turns.
MMC = 330 pf of ceramic caps
One MOT without voltage doubler
Re: ** Add your Tesla coil here **
Skywarrior, Wed Jun 18 2008, 07:09PM
Hi all!
My first coil is half-bridge (FDH44N50) SSTC with interrupter.
Primary winding size (D x h): 12cm x 7cm
Primary wire diameter is 2.7mm, 7 turns
Secondary winding size: 11cm x 40cm
Secondary wire diameter is 0.233mm (0.27mm in enamel), 1420 turns
Toroid: 6cm Ñ… 20 cm
Frequency: ~ 210 kHz
Streamer length ~30cm.
Skywarrior, Wed Jun 18 2008, 07:09PM
Hi all!
My first coil is half-bridge (FDH44N50) SSTC with interrupter.
Primary winding size (D x h): 12cm x 7cm
Primary wire diameter is 2.7mm, 7 turns
Secondary winding size: 11cm x 40cm
Secondary wire diameter is 0.233mm (0.27mm in enamel), 1420 turns
Toroid: 6cm Ñ… 20 cm
Frequency: ~ 210 kHz
Streamer length ~30cm.
Re: ** Add your Tesla coil here **
Kristian, Mon Jun 23 2008, 12:29AM
I think I posted this in another thread but I though I would put it here also. This is my twin bipolar coil. I don't have a still camera at the moment so I'm posting a video. Specs are listed in the video details.
Kristian, Mon Jun 23 2008, 12:29AM
I think I posted this in another thread but I though I would put it here also. This is my twin bipolar coil. I don't have a still camera at the moment so I'm posting a video. Specs are listed in the video details.
Re: ** Add your Tesla coil here **
Fraggle, Wed Jul 09 2008, 07:01PM
This is my first Tesla coil and I`m improving as I go.
2 MOTs in series for ~4200V.
1 MOT with the secondary shorted for ballast.
Single static gap quenched by a powerful blower.
16nF MMC.
~1000 turns on the secondary, I forget the gauge but about 4 turns/mm.
Aluminium duct toroid on top of two Balti dishes covered with foil.
I made the mistake of winding a widely spaced spiral for the top 10cm or so and had to resort to covering it with foil to cure persistent problems with break-out (which worked very well).
Next up; more capacitors and voltage doubler.
Fraggle, Wed Jul 09 2008, 07:01PM
This is my first Tesla coil and I`m improving as I go.
2 MOTs in series for ~4200V.
1 MOT with the secondary shorted for ballast.
Single static gap quenched by a powerful blower.
16nF MMC.
~1000 turns on the secondary, I forget the gauge but about 4 turns/mm.
Aluminium duct toroid on top of two Balti dishes covered with foil.
I made the mistake of winding a widely spaced spiral for the top 10cm or so and had to resort to covering it with foil to cure persistent problems with break-out (which worked very well).
Next up; more capacitors and voltage doubler.
Re: ** Add your Tesla coil here **
Mads Barnkob, Thu Jul 10 2008, 08:25AM
Kaizer SGTC I
My first Tesla coil is a flyback driven SGTC able of delivering 105mm(4") sparks to grounded wire.
PSU: 20kV single transistor flyback driver at 12-17Vdc
Secondary: 800T 0.127mm(AWG36) on a 50mm(2") diameter form, 110mm(4,33") tall
Primary: 6.6T 1.75mm(AWG13-14) flat coil, inner diameter 90mm(3,5"), outer diameter 180mm(7")
Capacitor: a single 8nF 20kV doorknob, an old Fribourg Condensateurs from 1961
Topload: 60mm(2,36") diameter tennis ball wrapped in aluminum foil
Spark gap: static with tungsten rods
Resonant frequency: 655kHz
Construction details and further pictures at:
Mads Barnkob, Thu Jul 10 2008, 08:25AM
Kaizer SGTC I
My first Tesla coil is a flyback driven SGTC able of delivering 105mm(4") sparks to grounded wire.
PSU: 20kV single transistor flyback driver at 12-17Vdc
Secondary: 800T 0.127mm(AWG36) on a 50mm(2") diameter form, 110mm(4,33") tall
Primary: 6.6T 1.75mm(AWG13-14) flat coil, inner diameter 90mm(3,5"), outer diameter 180mm(7")
Capacitor: a single 8nF 20kV doorknob, an old Fribourg Condensateurs from 1961
Topload: 60mm(2,36") diameter tennis ball wrapped in aluminum foil
Spark gap: static with tungsten rods
Resonant frequency: 655kHz
Construction details and further pictures at:
Re: ** Add your Tesla coil here **
MRacerxdl, Wed Sept 10 2008, 10:02PM
Here is my first good drsstc.
Half-bridge of stgw30nc60wd (60A 600V), running at 127VAC Mains with doubler (~300VDC Bus)
Primary Cap 50nF 1600V (I know it should be bigger voltage)
I didnt make any protections so far, but I when I try the fullbridge design I will put some TVS and a Current protection.
Here are some pics:
My H-Bridge (Wire-mess, but it works :D) and the sparks (~50cm to the air)
Interrupter runs from 50BPS to 600BPS (2,5A to 10A)
Fres = 244kHz (Measured)
And a video:
MRacerxdl, Wed Sept 10 2008, 10:02PM
Here is my first good drsstc.
Half-bridge of stgw30nc60wd (60A 600V), running at 127VAC Mains with doubler (~300VDC Bus)
Primary Cap 50nF 1600V (I know it should be bigger voltage)
I didnt make any protections so far, but I when I try the fullbridge design I will put some TVS and a Current protection.
Here are some pics:
My H-Bridge (Wire-mess, but it works :D) and the sparks (~50cm to the air)
Interrupter runs from 50BPS to 600BPS (2,5A to 10A)
Fres = 244kHz (Measured)
And a video:
Re: ** Add your Tesla coil here **
Steve Hobley, Thu Oct 02 2008, 02:46PM
Here's mine - a 60ma 12kv NST.
Mainly built with parts from Alan Majernik's Teslastuff site.
Here's a youtube clip of it running (with nasty flashover from primary to strike rail at the end
)
http://www.youtube.com/watch?v=GO9_vc49ZcU
Steve Hobley, Thu Oct 02 2008, 02:46PM
Here's mine - a 60ma 12kv NST.
Mainly built with parts from Alan Majernik's Teslastuff site.
Here's a youtube clip of it running (with nasty flashover from primary to strike rail at the end
)http://www.youtube.com/watch?v=GO9_vc49ZcU
Re: ** Add your Tesla coil here **
Phillip Slawinski, Fri Oct 03 2008, 01:18PM
Here's my 6" coil. This coil was built over about three months, and it still isn't finished. I can't really go any further with it until I move out of this apartment. I can't test the coil easily for obvious reasons.
Secondary: 900T [25 inches] 22AWG on 6" form
Topload: 7x30" + 7X24"
Primary: 13T 1/4" Copper Tubing
Tank Cap: 2X 50kV .025uF Maxwell Pulse Caps
Transformer: 14.4 Pole pig [in the image below] Soon to be powered by a bombarder.
I've also built an 833C VTTC. I'm currently getting a maximum of 34" of spark out of the coil in stacatto mode.
Phillip Slawinski, Fri Oct 03 2008, 01:18PM
Here's my 6" coil. This coil was built over about three months, and it still isn't finished. I can't really go any further with it until I move out of this apartment. I can't test the coil easily for obvious reasons.
Secondary: 900T [25 inches] 22AWG on 6" form
Topload: 7x30" + 7X24"
Primary: 13T 1/4" Copper Tubing
Tank Cap: 2X 50kV .025uF Maxwell Pulse Caps
Transformer: 14.4 Pole pig [in the image below] Soon to be powered by a bombarder.
I've also built an 833C VTTC. I'm currently getting a maximum of 34" of spark out of the coil in stacatto mode.
Re: ** Add your Tesla coil here **
LithiumLord, Mon Oct 13 2008, 09:19AM
(offtopic)finally managed to solve that e-mail stuff :)
My flower-pot SSTC, running 240vac from a variac. 30A H-bridge with a tricky optocoupler-based drive, the system is feedback-based and has an internal noise-rejecting interruptor triggered by external strobe from a remote control as well as any other strobe source. The secondary is 40cm high, painted with black spraypaint.
A short clip on YouTube
LithiumLord, Mon Oct 13 2008, 09:19AM
(offtopic)finally managed to solve that e-mail stuff :)
My flower-pot SSTC, running 240vac from a variac. 30A H-bridge with a tricky optocoupler-based drive, the system is feedback-based and has an internal noise-rejecting interruptor triggered by external strobe from a remote control as well as any other strobe source. The secondary is 40cm high, painted with black spraypaint.
A short clip on YouTube
Re: ** Add your Tesla coil here **
Robert2, Tue Oct 21 2008, 07:09PM
My first TC:
And my first SSTC :P
TC 0,01 magnet wire , power by flyback, he have 1200KHz,
SSTC: 0,18mm, 16cmx40cm gived 120KHz, power by halfbridge of IRFP460,
More info, photo in my movies.
SSTC:
MCT:
Robert2, Tue Oct 21 2008, 07:09PM
My first TC:
And my first SSTC :P
TC 0,01 magnet wire , power by flyback, he have 1200KHz,
SSTC: 0,18mm, 16cmx40cm gived 120KHz, power by halfbridge of IRFP460,
More info, photo in my movies.
SSTC:
MCT:
Re: ** Add your Tesla coil here **
Florian, Fri Nov 28 2008, 07:19PM
I am new to this forum, here are some of my coils.
0,5inch SG-Coil (Newest one)
Secondary: 1440 turns with 0,05mm enamelled copper wire on 75mm winding lenght
Transformer: OBIT 20mA 12KV
Max. Sparks to ground: 140mm (1,8 x winding lenght)
Tank cap: 2,2nF @ 12,5KVDC WIMA MMC
Florian, Fri Nov 28 2008, 07:19PM
I am new to this forum, here are some of my coils.
0,5inch SG-Coil (Newest one)
Secondary: 1440 turns with 0,05mm enamelled copper wire on 75mm winding lenght
Transformer: OBIT 20mA 12KV
Max. Sparks to ground: 140mm (1,8 x winding lenght)
Tank cap: 2,2nF @ 12,5KVDC WIMA MMC
Re: ** Add your Tesla coil here **
Florian, Fri Nov 28 2008, 07:37PM
1inch SG-Coil (Newest one)
Secondary: 1200 turns of 0,15mm enamelled copperwire on 165mm winding lenght
Transformer: double or triple OBIT ~40mA@12KV
Max. Sparks to ground: 330mm (2x WL)
Tank cap: 2,7nF@13KV WIMA MMC
Florian, Fri Nov 28 2008, 07:37PM
1inch SG-Coil (Newest one)
Secondary: 1200 turns of 0,15mm enamelled copperwire on 165mm winding lenght
Transformer: double or triple OBIT ~40mA@12KV
Max. Sparks to ground: 330mm (2x WL)
Tank cap: 2,7nF@13KV WIMA MMC
Re: ** Add your Tesla coil here **
Florian, Fri Nov 28 2008, 07:41PM
2inch SG-Coil (Newest one)
Secondary: 700 turns of 0,315 enamelled copper wire on 240mm
Transformer: dual Neon 12KV@150mA
Max. Sparks to ground: 600mm (2,5x WL)
Tank cap: 6,8nF@12,5KVDC WIMA MMC
Florian, Fri Nov 28 2008, 07:41PM
2inch SG-Coil (Newest one)
Secondary: 700 turns of 0,315 enamelled copper wire on 240mm
Transformer: dual Neon 12KV@150mA
Max. Sparks to ground: 600mm (2,5x WL)
Tank cap: 6,8nF@12,5KVDC WIMA MMC
Re: ** Add your Tesla coil here **
Florian, Fri Nov 28 2008, 07:46PM
3inch SG-Coil (Newest one and best of my coils)
Secondary: 966 turns of 0,4mm enamelled copper wire on 370mm
Transformer: dual Neon 12KV@150-300mA
Max. Sparks to ground: 1000mm (2,7x WL)
Tank cap: 14,6nF@18,75KVDC WIMA MMC
Sparkgap: 9 stage static gap
Florian, Fri Nov 28 2008, 07:46PM
3inch SG-Coil (Newest one and best of my coils)
Secondary: 966 turns of 0,4mm enamelled copper wire on 370mm
Transformer: dual Neon 12KV@150-300mA
Max. Sparks to ground: 1000mm (2,7x WL)
Tank cap: 14,6nF@18,75KVDC WIMA MMC
Sparkgap: 9 stage static gap
Re: ** Add your Tesla coil here **
Florian, Fri Nov 28 2008, 07:51PM
4inch SG-Coil
Secondary: 1025 turns 0,6mm enamelled wire on 625mm
Transformer: dual Neon 12KV@150-300mA
Max. Sparks to ground: 1250mm (2x WL) -> No finished yet
Tank cap: 30nF@18,75KV WIMA MMC
Sparkgap: Stativ vacuum-singlegap
Florian, Fri Nov 28 2008, 07:51PM
4inch SG-Coil
Secondary: 1025 turns 0,6mm enamelled wire on 625mm
Transformer: dual Neon 12KV@150-300mA
Max. Sparks to ground: 1250mm (2x WL) -> No finished yet
Tank cap: 30nF@18,75KV WIMA MMC
Sparkgap: Stativ vacuum-singlegap
Re: ** Add your Tesla coil here **
Florian, Fri Nov 28 2008, 07:55PM
6inch SG-Coil
Secondary: 1200 turns 0,6mm enamelled copper wire on 650mm
Transformer: dual Neon 12KV@150-300mA
Max. Sparks to ground: 1300mm (2x WL) -> No finished yet
Tank cap: 30nF@18,75KV WIMA MMC
Sparkgap: Stativ vacuum-singlegap
Florian, Fri Nov 28 2008, 07:55PM
6inch SG-Coil
Secondary: 1200 turns 0,6mm enamelled copper wire on 650mm
Transformer: dual Neon 12KV@150-300mA
Max. Sparks to ground: 1300mm (2x WL) -> No finished yet
Tank cap: 30nF@18,75KV WIMA MMC
Sparkgap: Stativ vacuum-singlegap
Re: ** Add your Tesla coil here **
gangster, Mon Dec 29 2008, 11:56PM
This is my mini VTTC with 6P45S tube
Parameters: - secondary coil 5x14,5cm , cca 700 turns
- primary coil 7,5cm diameter 20 turns
- feedback coil 18 turns on 7,5cm diameter
- power supply 1MOT with triac regulator
- max sparks of this coil - 25cm
gangster, Mon Dec 29 2008, 11:56PM
This is my mini VTTC with 6P45S tube
Parameters: - secondary coil 5x14,5cm , cca 700 turns
- primary coil 7,5cm diameter 20 turns
- feedback coil 18 turns on 7,5cm diameter
- power supply 1MOT with triac regulator
- max sparks of this coil - 25cm
Re: ** Add your Tesla coil here **
Mads Barnkob, Sat Jan 24 2009, 11:38AM
Tubes 2x RCA 811A transmitter tubes
High voltage supply 2300VAC MOT with voltage doubler. Supplied with 150Vac through a variac.
Primary coil 180mm diameter, 1.78mm diameter copper wire, 26 windings, tapped at 22 windings.
Capacitor tank 4nF doorknob Fribourg capacitor 20kV pulse rated
Secondary coil 75mm diameter, 440mm long, 1600 windings, 0.25mm enamelled copper wire.
Topload 45mm small diameter, 152mm large diameter John Freud toroid
Gridleak circuit 19 windings feedbackcoil, 1nF capacitor and 500R to 2K5 resistor.
Input power 300W at 150V input voltage, 900W at 180V. 50W for the tubes heating.
Spark length up to 330mm long sparks.
You can see all the rest of the picture and construction notes here:
Mads Barnkob, Sat Jan 24 2009, 11:38AM
Tubes 2x RCA 811A transmitter tubes
High voltage supply 2300VAC MOT with voltage doubler. Supplied with 150Vac through a variac.
Primary coil 180mm diameter, 1.78mm diameter copper wire, 26 windings, tapped at 22 windings.
Capacitor tank 4nF doorknob Fribourg capacitor 20kV pulse rated
Secondary coil 75mm diameter, 440mm long, 1600 windings, 0.25mm enamelled copper wire.
Topload 45mm small diameter, 152mm large diameter John Freud toroid
Gridleak circuit 19 windings feedbackcoil, 1nF capacitor and 500R to 2K5 resistor.
Input power 300W at 150V input voltage, 900W at 180V. 50W for the tubes heating.
Spark length up to 330mm long sparks.
You can see all the rest of the picture and construction notes here:
Re: ** Add your Tesla coil here **
Sonic, Sat Jan 24 2009, 11:03PM
Hi, my first post.
Last 6 months I've been working in my spare time on my first coil. I've taken lots of pictures of the construction, which may be helpful for other coilers. The pictures can be found at: http://www.flickr.com/photos/sitelab/sets/72157605931875044/
Your comments are welcome.
update 090505:
The coil is powered by an NST of 12kV/16mA. The coil has 10 primary windings and 900 windings on the secondary coil. It has been tested now with 2 different designed static spark gaps.
Static gap 1:
Static gap 2:
The result however was a bit disappointing. A movie can be found here:
http://www.flickr.com/photos/sitelab/3230823415/in/set-72157617656624468/
I have just finished a Synchronized rotary spark gap, which I will test this week.
This is a picture of the finished SRSG:
I am very curious about whether this will bring bigger sparks. I'll update this post once I have been able to test it.
Sonic, Sat Jan 24 2009, 11:03PM
Hi, my first post.
Last 6 months I've been working in my spare time on my first coil. I've taken lots of pictures of the construction, which may be helpful for other coilers. The pictures can be found at: http://www.flickr.com/photos/sitelab/sets/72157605931875044/
Your comments are welcome.
update 090505:
The coil is powered by an NST of 12kV/16mA. The coil has 10 primary windings and 900 windings on the secondary coil. It has been tested now with 2 different designed static spark gaps.
Static gap 1:
Static gap 2:
The result however was a bit disappointing. A movie can be found here:
http://www.flickr.com/photos/sitelab/3230823415/in/set-72157617656624468/
I have just finished a Synchronized rotary spark gap, which I will test this week.
This is a picture of the finished SRSG:
I am very curious about whether this will bring bigger sparks. I'll update this post once I have been able to test it.
Re: ** Add your Tesla coil here **
Duality, Sun Feb 01 2009, 03:04PM
can i add my tesla too?
i don't have a pic but a movie of it
its primairy is 18 turns.
is secundary is 450 turns. and 18cm high.
its diameter is 2,5 cm.
powered by a flyback driven by ne555 :P
i am pumping 29 volts treu it.
i dont know how many amps.
in case of the sstc same set-up only no flyback,
and no caps (big ones i don't know the values )
and no spark gap (spark gap is adjustable)
20 to 200 mhz running i don't know where it is exactly.
(still work in progress )
arc length 3 cm
edit:
it's now a sstc ;)
edit:
and now it's a spark gap again ;)
Duality, Sun Feb 01 2009, 03:04PM
can i add my tesla too?
i don't have a pic but a movie of it
its primairy is 18 turns.
is secundary is 450 turns. and 18cm high.
its diameter is 2,5 cm.
powered by a flyback driven by ne555 :P
i am pumping 29 volts treu it.
i dont know how many amps.
in case of the sstc same set-up only no flyback,
and no caps (big ones i don't know the values )
and no spark gap (spark gap is adjustable)
20 to 200 mhz running i don't know where it is exactly.
(still work in progress )
arc length 3 cm
edit:
it's now a sstc ;)
edit:
and now it's a spark gap again ;)
Re: ** Add your Tesla coil here **
MRacerxdl, Sun Mar 01 2009, 11:45PM
Hmm, posting here my new DRSSTC
Halfbridge of STGW30NC60W running at 300VDC
3800uF 400V Cap Bank for DC Smooth.
47nF 6400V Primary cap.
65cm height x 10cm diameter wounded with wire 30AWG
140kHz Fres (Still needing a bigger topload)
35-45cm sparks to air, and safe ground striks :D without OCD.
Video:
MRacerxdl, Sun Mar 01 2009, 11:45PM
Hmm, posting here my new DRSSTC
Halfbridge of STGW30NC60W running at 300VDC
3800uF 400V Cap Bank for DC Smooth.
47nF 6400V Primary cap.
65cm height x 10cm diameter wounded with wire 30AWG
140kHz Fres (Still needing a bigger topload)
35-45cm sparks to air, and safe ground striks :D without OCD.
Video:
Re: ** Add your Tesla coil here **
kilovolt, Sat Mar 14 2009, 08:11PM
My VTTC, built about one year ago. The tube is a Russian GU81M Pentode.
Power transformers are 2 pcs 10kV potential transformers, limited to about 3.5kV AC. No level shifter used.
Regards kilovolt
kilovolt, Sat Mar 14 2009, 08:11PM
My VTTC, built about one year ago. The tube is a Russian GU81M Pentode.
Power transformers are 2 pcs 10kV potential transformers, limited to about 3.5kV AC. No level shifter used.
Regards kilovolt
Re: ** Add your Tesla coil here **
Alexandre, Mon Mar 16 2009, 05:42PM
My SGTC, built in a weekend that I had nothing to do
Secondary - 4inch PVC tube 40cm 24AWG wire
Primary - 13 turns 5mm tube (tap on 6º turn)
RSG - 3450 assyn. motor, 20cm acrylic disc 12 contacts
Power - QUAD-MOT power supply aprox. 5KW
Cap bank - series of 30 capacitors, 1uF 630V each, total 33nF@ 19kv
Toroids - mini toroid, 6cmX25cm - bigger toroid 13cmX40cm
1 meter sparks to the air
Pictures:
video in HD
Alexandre, Mon Mar 16 2009, 05:42PM
My SGTC, built in a weekend that I had nothing to do
Secondary - 4inch PVC tube 40cm 24AWG wire
Primary - 13 turns 5mm tube (tap on 6º turn)
RSG - 3450 assyn. motor, 20cm acrylic disc 12 contacts
Power - QUAD-MOT power supply aprox. 5KW
Cap bank - series of 30 capacitors, 1uF 630V each, total 33nF@ 19kv
Toroids - mini toroid, 6cmX25cm - bigger toroid 13cmX40cm
1 meter sparks to the air
Pictures:
video in HD
Re: ** Add your Tesla coil here **
ElectricalEngg., Wed Apr 29 2009, 06:32PM
My Tesla Coil Configuration:
Primary Transformer Output Voltage (VAC) 6000.0000
Primary Transformer Rated Current (AMP) 0.0300
Primary Transformer Input Frequency (HZ) 50.0000
Primary Transformer Input Voltage (VAC) 220.0000
Primary Transformer PFC Rating (%) 100.0000
=========================
Primary Coil Inside Diameter (IN) 3.0000
Primary Coil Wire Diameter (IN) 0.1760
Primary Coil Wire Spacing (IN) 1.0000
Primary Coil Number of Turns 10.0000
Primary Coil Angle From Horizontal Plane (DEGREES) 0.0000
=========================
Primary Coil Calculations
Inductance (mH) 0.0289
Average Radius (IN) 7.38
Total Diameter (IN) 26.52
Wire Length (FT) 36.02
Secondary Frequency (kHZ) 230.4926
Primary Capacitor Required (uF) 0.0165
=========================
Secondary Wire Diameter (IN) 0.0126
Secondary Coil Total Outside Diameter (IN) 2.0000
Length of Secondary Coil (IN) 26.0000
Secondary Wire Gauge 28.0000
Secondary Turns/Inch 75.1582
Inductance (mH) 13.36
Medhurst K 1.62
Radius (IN) 1.00
Circumference (IN) 6.28
Wire Length (FT) 992.48
Self-Capacitance (pF) 8.25
Secondary Frequency (kHZ) 479.41
Secondary Frequency W/Terminal C (kHZ) 230.49
=========================
Top Load Capacitance (PF) 27.4459
Sphere Radius/Toroid Tube Diameter (IN) 3.5000
Toroid Diameter Tube Center-to-Center (IN) 26.0000
My Tesla Coil a few details and better sparks view :)
http://www.youtube.com/watch?v=z5upzouQxcA
ElectricalEngg., Wed Apr 29 2009, 06:32PM
My Tesla Coil Configuration:
Primary Transformer Output Voltage (VAC) 6000.0000
Primary Transformer Rated Current (AMP) 0.0300
Primary Transformer Input Frequency (HZ) 50.0000
Primary Transformer Input Voltage (VAC) 220.0000
Primary Transformer PFC Rating (%) 100.0000
=========================
Primary Coil Inside Diameter (IN) 3.0000
Primary Coil Wire Diameter (IN) 0.1760
Primary Coil Wire Spacing (IN) 1.0000
Primary Coil Number of Turns 10.0000
Primary Coil Angle From Horizontal Plane (DEGREES) 0.0000
=========================
Primary Coil Calculations
Inductance (mH) 0.0289
Average Radius (IN) 7.38
Total Diameter (IN) 26.52
Wire Length (FT) 36.02
Secondary Frequency (kHZ) 230.4926
Primary Capacitor Required (uF) 0.0165
=========================
Secondary Wire Diameter (IN) 0.0126
Secondary Coil Total Outside Diameter (IN) 2.0000
Length of Secondary Coil (IN) 26.0000
Secondary Wire Gauge 28.0000
Secondary Turns/Inch 75.1582
Inductance (mH) 13.36
Medhurst K 1.62
Radius (IN) 1.00
Circumference (IN) 6.28
Wire Length (FT) 992.48
Self-Capacitance (pF) 8.25
Secondary Frequency (kHZ) 479.41
Secondary Frequency W/Terminal C (kHZ) 230.49
=========================
Top Load Capacitance (PF) 27.4459
Sphere Radius/Toroid Tube Diameter (IN) 3.5000
Toroid Diameter Tube Center-to-Center (IN) 26.0000
My Tesla Coil a few details and better sparks view :)
http://www.youtube.com/watch?v=z5upzouQxcA
Re: ** Add your Tesla coil here **
jeffomatic, Sun May 03 2009, 07:46AM
Hello! New coiler here.. 59 year old Utahn. The first one I built was back in 1967 and wasn't very successful! My new SGTC has just been built. It uses a 12 KV 60 MA NST and a Maxwell .025 UF 50 KV pulse cap.
I wound the secondary on plastic pipe with litz wire. It has a top section of smaller diameter. Using a simple spark gap, I got good 20 inch streamers with minimal tuning. I used the classic tesla java calculator to good advantage. I'm using a rather steep conical primary of 1/4" copper tubing. The torus top load is a foil tape covered foam water toy section, then burnished with a spoon. It was a lash up on the bench. When first powered, the coil sought out a bicycle that I have hanging from the ceiling, with streamers shooting from the bike to the wall. Now I am installing it on a retro lamp table with proper safety considerations, such as a strike rail, Acrylic shields around the primary parts, etc. It's lots of fun, and I'm looking forward to getting some good pictures of various discharges.
I also have a half-built VanDeGraaf that I hope to complete soon.
jeffomatic, Sun May 03 2009, 07:46AM
Hello! New coiler here.. 59 year old Utahn. The first one I built was back in 1967 and wasn't very successful! My new SGTC has just been built. It uses a 12 KV 60 MA NST and a Maxwell .025 UF 50 KV pulse cap.
I wound the secondary on plastic pipe with litz wire. It has a top section of smaller diameter. Using a simple spark gap, I got good 20 inch streamers with minimal tuning. I used the classic tesla java calculator to good advantage. I'm using a rather steep conical primary of 1/4" copper tubing. The torus top load is a foil tape covered foam water toy section, then burnished with a spoon. It was a lash up on the bench. When first powered, the coil sought out a bicycle that I have hanging from the ceiling, with streamers shooting from the bike to the wall. Now I am installing it on a retro lamp table with proper safety considerations, such as a strike rail, Acrylic shields around the primary parts, etc. It's lots of fun, and I'm looking forward to getting some good pictures of various discharges.
I also have a half-built VanDeGraaf that I hope to complete soon.
Re: ** Add your Tesla coil here **
Mads Barnkob, Sun May 03 2009, 11:29AM
This my version of Steve Wards SSTC5, meet the Kaizer SSTC I
Bridge 2x IRFP460s MOSFETs in a halfbridge configuration
Bridge supply 0 - 230VAC from a variac, 8A rectifier bridge and 330uF smoothing capacitor
Primary coil 115mm diameter, 1.78mm diameter isolated copper wire, 10 windings.
Secondary coil 110mm diameter, 275mm long, 1000 windings, 0.25mm enamelled copper wire.
Resonant frequency self tuning, but around 250 kHz.
Topload 100mm small diameter, 240mm large diameter, toroid.
Input power 1000W at 230VAC input voltage in CW mode.
Spark length up to 250mm long sparks in interupted mode.
For more pictures and the construction details, read my article:
Mads Barnkob, Sun May 03 2009, 11:29AM
This my version of Steve Wards SSTC5, meet the Kaizer SSTC I
Bridge 2x IRFP460s MOSFETs in a halfbridge configuration
Bridge supply 0 - 230VAC from a variac, 8A rectifier bridge and 330uF smoothing capacitor
Primary coil 115mm diameter, 1.78mm diameter isolated copper wire, 10 windings.
Secondary coil 110mm diameter, 275mm long, 1000 windings, 0.25mm enamelled copper wire.
Resonant frequency self tuning, but around 250 kHz.
Topload 100mm small diameter, 240mm large diameter, toroid.
Input power 1000W at 230VAC input voltage in CW mode.
Spark length up to 250mm long sparks in interupted mode.
For more pictures and the construction details, read my article:
Re: ** Add your Tesla coil here **
Mads Barnkob, Sun May 03 2009, 06:12PM
Kaizer SSTC II
Bridge 4x IRFP460s MOSFETs in a fullbridge configuration
Bridge supply 0 - 260VAC from a variac, 8A rectifier bridge and 1500uF smoothing capacitor
Primary coil 115mm diameter, 1.78mm diameter isolated copper wire, 8 windings.
Secondary coil 110mm diameter, 275mm long, 1000 windings, 0.25mm enamelled copper wire.
Resonant frequency Selftuning at around 250kHz.
Topload 100mm small diameter, 240mm large diameter, toroid.
Input power
Continues Wave mode: 2000 - 4000W at 200VAC input voltage.
Interrupted mode: 100 - 2000W at 260VAC input voltage.
Audio modulated mode: 300 - 400W at 150VAC input voltage.
Spark length up to 475 mm long sparks.
For more pictures and a film read my article:
Mads Barnkob, Sun May 03 2009, 06:12PM
Kaizer SSTC II
Bridge 4x IRFP460s MOSFETs in a fullbridge configuration
Bridge supply 0 - 260VAC from a variac, 8A rectifier bridge and 1500uF smoothing capacitor
Primary coil 115mm diameter, 1.78mm diameter isolated copper wire, 8 windings.
Secondary coil 110mm diameter, 275mm long, 1000 windings, 0.25mm enamelled copper wire.
Resonant frequency Selftuning at around 250kHz.
Topload 100mm small diameter, 240mm large diameter, toroid.
Input power
Continues Wave mode: 2000 - 4000W at 200VAC input voltage.
Interrupted mode: 100 - 2000W at 260VAC input voltage.
Audio modulated mode: 300 - 400W at 150VAC input voltage.
Spark length up to 475 mm long sparks.
For more pictures and a film read my article:
Re: ** Add your Tesla coil here **
Tesladownunder, Fri Jun 05 2009, 07:07PM
The rules for posting on this thread are on page one and are a bit different to other threads in 4HV. This is to allow a fairly consistent and brief approach to allow people to compare a large number of different coils.
A reminder:
The 3 Rules to keep it consistent and readable:
Each coil to have only 1 page of info (ie fits on your computer screen). Brief is best.
Each coil to have only 2-3 photos (do not double post).
Only coil details and photos to be posted. Direct any queries direct to the person or in a new thread.
A coil is defined by its secondary (change of toroid isn't a new coil)
Enter as many coils as you wish. Beginners coils are welcome and this log is designed to be helpful for beginners.
Enjoy!
Tesladownunder, Fri Jun 05 2009, 07:07PM
Rules for ** Add your Tesla coil here **
The rules for posting on this thread are on page one and are a bit different to other threads in 4HV. This is to allow a fairly consistent and brief approach to allow people to compare a large number of different coils.
A reminder:
The 3 Rules to keep it consistent and readable:
Each coil to have only 1 page of info (ie fits on your computer screen). Brief is best.
Each coil to have only 2-3 photos (do not double post).
Only coil details and photos to be posted. Direct any queries direct to the person or in a new thread.
A coil is defined by its secondary (change of toroid isn't a new coil)
Enter as many coils as you wish. Beginners coils are welcome and this log is designed to be helpful for beginners.
Enjoy!
Re: ** Add your Tesla coil here **
Tesladownunder, Fri Jun 26 2009, 09:02PM
My briefcase coil. Secondary stores flat so nice and compact when closed. Sparks taste good too!
Tesladownunder, Fri Jun 26 2009, 09:02PM
My briefcase coil. Secondary stores flat so nice and compact when closed. Sparks taste good too!
Re: ** Add your Tesla coil here **
FireBird, Sat Jul 04 2009, 06:39AM
Design based on Steve Wards Mini SSTC
Bridge 2x IRFP260s MOSFETs in a half bridge configuration supplied with 120vac and smoothed by 600uF capacitor.
Secondary coil 3" diameter 9" tall and approx. 900 turns of 30awg wire
Topload 6.5' inner diameter, 10' outer diameter, toroid
Spark length approximately 7-8 inches
Self tuning via antenna
Can be audio modulated
My colorful driver
Moderate duty cycle and pulse rate with NaCl added to the breakout (1/10 second exposure)
FireBird, Sat Jul 04 2009, 06:39AM
Design based on Steve Wards Mini SSTC
Bridge 2x IRFP260s MOSFETs in a half bridge configuration supplied with 120vac and smoothed by 600uF capacitor.
Secondary coil 3" diameter 9" tall and approx. 900 turns of 30awg wire
Topload 6.5' inner diameter, 10' outer diameter, toroid
Spark length approximately 7-8 inches
Self tuning via antenna
Can be audio modulated
My colorful driver
Moderate duty cycle and pulse rate with NaCl added to the breakout (1/10 second exposure)
Re: ** Add your Tesla coil here **
Mates, Fri Oct 23 2009, 08:09PM
Red Traffic Cone Coil
Topology: Single switch SSTC with current-limitting capacitor
Driving circuit based on CT feedback and three BUP314 transitors (3pcs in parallel)
Operation freq: approx. 160KHz
Primary: Flat spiral; 6turns
Secondary: 50cm, conical shape, wire 0.315mm
Mates, Fri Oct 23 2009, 08:09PM
Red Traffic Cone Coil
Topology: Single switch SSTC with current-limitting capacitor
Driving circuit based on CT feedback and three BUP314 transitors (3pcs in parallel)
Operation freq: approx. 160KHz
Primary: Flat spiral; 6turns
Secondary: 50cm, conical shape, wire 0.315mm
Re: ** Add your Tesla coil here **
Goodchild, Tue Nov 10 2009, 01:11AM
First SSTC I ever built, second tesla coil I ever built.
This coil runs very reliably and can be run indefinitely without parts overheating.
Coil also has been audio modulated.
Coil stands about 3 feet tall
full bridge of IRFP260 MOSFETS
max spark length of about 15 inches
120v full/half rec mains
secondary 18 x 4.5" 1800 turns
primary 5 x 5" 6 turns
More Pics Here:
Goodchild, Tue Nov 10 2009, 01:11AM
First SSTC I ever built, second tesla coil I ever built.
This coil runs very reliably and can be run indefinitely without parts overheating.
Coil also has been audio modulated.
Coil stands about 3 feet tall
full bridge of IRFP260 MOSFETS
max spark length of about 15 inches
120v full/half rec mains
secondary 18 x 4.5" 1800 turns
primary 5 x 5" 6 turns
More Pics Here:
Re: ** Add your Tesla coil here **
radhoo, Sun Dec 06 2009, 10:43PM
My first SSTC is a high frequency solid state tesla coil. Complete construction details here:
my blog
Some pictures:
radhoo, Sun Dec 06 2009, 10:43PM
My first SSTC is a high frequency solid state tesla coil. Complete construction details here:
my blog
Some pictures:
Re: ** Add your Tesla coil here **
Joyeep, Mon Jan 18 2010, 04:06PM
HELLO 4HV.ORG!
This my first sstc,hope everyone likes!
大家好，这个是我第一个SSTCï¼Œæˆ‘å¾ˆå¸ Œæœ›å¤§å®¶å–œæ¬¢å®ƒã€‚
èƒ½å’Œå¤§å®¶åœ¨ä¸€èµ·å…±åŒ åˆ†äº«ã€‚æˆ‘æ„Ÿåˆ°å¾ˆè£å¹¸ã€‚也很高兴ï¼
VID EO:
Bridge 4x W20NB50 MOSFETs in a bridge
Bridge supply 0 - 220VAC from a variac,Half wave rectification,
Primary coil 115mm diameter, 2.5mm diameter isolated copper wire, 18 windings.
Secondary coil 110mm diameter, 275mm long, 1250 windings, 0.25mm enamelled copper wire.
Resonant frequency self tuning, but around 350kHz.
Topload 100mm small diameter, 240mm large diameter, toroid.
Input power 150W at 220VAC input voltage in Half wave rectification mode.
Spark length up to 180mm long
Joyeep, Mon Jan 18 2010, 04:06PM
HELLO 4HV.ORG!
This my first sstc,hope everyone likes!
大家好，这个是我第一个SSTCï¼Œæˆ‘å¾ˆå¸ Œæœ›å¤§å®¶å–œæ¬¢å®ƒã€‚
èƒ½å’Œå¤§å®¶åœ¨ä¸€èµ·å…±åŒ åˆ†äº«ã€‚æˆ‘æ„Ÿåˆ°å¾ˆè£å¹¸ã€‚也很高兴ï¼
VID EO:
Bridge 4x W20NB50 MOSFETs in a bridge
Bridge supply 0 - 220VAC from a variac,Half wave rectification,
Primary coil 115mm diameter, 2.5mm diameter isolated copper wire, 18 windings.
Secondary coil 110mm diameter, 275mm long, 1250 windings, 0.25mm enamelled copper wire.
Resonant frequency self tuning, but around 350kHz.
Topload 100mm small diameter, 240mm large diameter, toroid.
Input power 150W at 220VAC input voltage in Half wave rectification mode.
Spark length up to 180mm long
Re: ** Add your Tesla coil here **
raff, Tue Feb 09 2010, 01:32PM
Hello Forumers
1st POST in this section...
here is my FIRST ever tesla coil.. dated AUGUST 2009
this is where it all started.. my ZVS driven Spark Gap Tesla Coil (SGTC).. not much of a performer though (lack of know-how) and pri LC tank cap keeps getting DEAD.. maximum spark length is 6"-7"...
here shown is the ZVS flyback driver.. using IRPF260... powered from 80VDC @ 8A (or so I remember)
the whole setup
and a short video of it.. topload is crumpled aluminum foil... closer to primary LC resonance...
for more info, here is the link:
thanks!
raff, Tue Feb 09 2010, 01:32PM
Hello Forumers
1st POST in this section...
here is my FIRST ever tesla coil.. dated AUGUST 2009
this is where it all started.. my ZVS driven Spark Gap Tesla Coil (SGTC).. not much of a performer though (lack of know-how) and pri LC tank cap keeps getting DEAD.. maximum spark length is 6"-7"...
here shown is the ZVS flyback driver.. using IRPF260... powered from 80VDC @ 8A (or so I remember)
the whole setup
and a short video of it.. topload is crumpled aluminum foil... closer to primary LC resonance...
for more info, here is the link:
thanks!
Re: ** Add your Tesla coil here **
raff, Tue Feb 09 2010, 01:52PM
my take on SSTC..
project dated NOVEMBER 2009
shown bellow, the driver board.. SSTC running on secondary feedback using CT
sparks... 12" length
and the video:
more info can be found HERE:
first sstc
the rebuild
raff, Tue Feb 09 2010, 01:52PM
my take on SSTC..
project dated NOVEMBER 2009
shown bellow, the driver board.. SSTC running on secondary feedback using CT
sparks... 12" length
and the video:
more info can be found HERE:
first sstc
the rebuild
Re: ** Add your Tesla coil here **
PYLEMET-mk2, Tue Mar 16 2010, 07:30PM
my first and second SGTC
mini, 35cm sparks
video:
medium, 75cm sparks
video:
PYLEMET-mk2, Tue Mar 16 2010, 07:30PM
my first and second SGTC
mini, 35cm sparks
video:
medium, 75cm sparks
video:
Re: ** Add your Tesla coil here **
lpfthings, Wed Mar 24 2010, 08:18AM
Guess I can't really claim this as my own work, as most of it was a kit from eBay, but thought I would post it in this thread just incase anyone is looking to buy one, and wants to know what it's like
Uses 2 FGL60N100BNTD IGBT's half bridge
Bridge caps are 250V @ 1800uF each * 2
Tank cap is 3 942C's in parallel
Input, ~40W (12VAC @ 3.3A)
Spark output: Big enough! With the right tuning, about 45cm is achievable, but I haven't tuned it completely yet.
Has 2 adjustable modes, Normal mode is a single bang, about 1BPS, and Burst mode is a couple of bangs per second, rest, couple more bangs etc.
Really bad video snap:
I love this coil, despite accidentally blowing the IGBT's by shorting the bridge caps into their gates. Can run for hours and hours without overheating :)
It's an extremely nice kit, and a great way to learn about tesla coils if you are new to them :) Just watch out for those pesky capacitors!
lpfthings, Wed Mar 24 2010, 08:18AM
Guess I can't really claim this as my own work, as most of it was a kit from eBay, but thought I would post it in this thread just incase anyone is looking to buy one, and wants to know what it's like
Uses 2 FGL60N100BNTD IGBT's half bridge
Bridge caps are 250V @ 1800uF each * 2
Tank cap is 3 942C's in parallel
Input, ~40W (12VAC @ 3.3A)
Spark output: Big enough! With the right tuning, about 45cm is achievable, but I haven't tuned it completely yet.
Has 2 adjustable modes, Normal mode is a single bang, about 1BPS, and Burst mode is a couple of bangs per second, rest, couple more bangs etc.
Really bad video snap:
I love this coil, despite accidentally blowing the IGBT's by shorting the bridge caps into their gates. Can run for hours and hours without overheating :)
It's an extremely nice kit, and a great way to learn about tesla coils if you are new to them :) Just watch out for those pesky capacitors!
Re: ** Add your Tesla coil here **
robertomegavolt, Fri Apr 09 2010, 08:52PM
Hello my name is Roberto I'm writing from Italy will post my first Tesla Coil
Technical Data
Two Potential tranformer 24 kV 250 mA 50 Hz, in parallel
Ten Mxwell capacitor 30 nF 35 kV seie parallel for a total of 150 nF
70 Kv.
Secondary coil diameter 250 x 1000 2500
resonant frequency, 86.5 Kz Spark Gap rotary synchronous 100 BPS 3000 RPM
Maximum spark lenght 2.5 meter
Avideo clip is available here :
robertomegavolt, Fri Apr 09 2010, 08:52PM
Hello my name is Roberto I'm writing from Italy will post my first Tesla Coil
Technical Data
Two Potential tranformer 24 kV 250 mA 50 Hz, in parallel
Ten Mxwell capacitor 30 nF 35 kV seie parallel for a total of 150 nF
70 Kv.
Secondary coil diameter 250 x 1000 2500
resonant frequency, 86.5 Kz Spark Gap rotary synchronous 100 BPS 3000 RPM
Maximum spark lenght 2.5 meter
Avideo clip is available here :
Re: ** Add your Tesla coil here **
robertomegavolt, Thu Apr 22 2010, 11:19PM
Two Potential tranformer 24 kV 250 mA 50 Hz, in parallel
robertomegavolt, Thu Apr 22 2010, 11:19PM
Two Potential tranformer 24 kV 250 mA 50 Hz, in parallel
Re: ** Add your Tesla coil here **
GreenLab, Fri Jul 30 2010, 12:22AM
hello,
my name is GreenLab from germany and that is my first post.
excuses, but my english is very bad!
i will show my newest tesla coil M-3 :)
technical data:
typ= SGTC
HV source= neon sign transformer 6 kv/ 35 ma (120 ma)
MMC = 25 nf
spark lenght= 38 inch (1 meter)
Video
GreenLab, Fri Jul 30 2010, 12:22AM
hello,
my name is GreenLab from germany and that is my first post.
excuses, but my english is very bad!
i will show my newest tesla coil M-3 :)
technical data:
typ= SGTC
HV source= neon sign transformer 6 kv/ 35 ma (120 ma)
MMC = 25 nf
spark lenght= 38 inch (1 meter)
Video
Re: ** Add your Tesla coil here **
GreenLab, Sat Jul 31 2010, 09:51PM
and my first coil (build with a friend)
typ= SGTC
hv source= 8kv 50 ma (150 ma) nst
capacitor= 57 nf
compressed air spark gap
spark lenght= 51" (1300 mm)
Video´s
GreenLab, Sat Jul 31 2010, 09:51PM
and my first coil (build with a friend)
typ= SGTC
hv source= 8kv 50 ma (150 ma) nst
capacitor= 57 nf
compressed air spark gap
spark lenght= 51" (1300 mm)
Video´s
Re: ** Add your Tesla coil here **
genie109, Sun Aug 01 2010, 01:10AM
Hello
First Sorry for my bad English, im from Germany. I will show my first cail its a SGTC the Secondary is on a 11cm Tube with 1333 turns of 0,32mm CuL. As highvoltage source i am using a NST with 5KV and 85mA that loads a capacitator with 55nF wich i made of Wima FKP 1 capacitators. The Spark Gap is made put of Copper tubes.
The pictures are old now the spark lenght is about 80cm long that you can see in the Movies.
Pictures:
The coil
Spark
A Spark that goes in a miniature Eifel tower
Movies:
Greets Marco
genie109, Sun Aug 01 2010, 01:10AM
Hello
First Sorry for my bad English, im from Germany. I will show my first cail its a SGTC the Secondary is on a 11cm Tube with 1333 turns of 0,32mm CuL. As highvoltage source i am using a NST with 5KV and 85mA that loads a capacitator with 55nF wich i made of Wima FKP 1 capacitators. The Spark Gap is made put of Copper tubes.
The pictures are old now the spark lenght is about 80cm long that you can see in the Movies.
Pictures:
The coil
Spark
A Spark that goes in a miniature Eifel towerMovies:
Greets Marco
Re: ** Add your Tesla coil here **
MadMrMike, Sun Aug 01 2010, 05:56PM
Hi, everyone!
This is my first post. I hope it's well received.
I figured I'd start off by posting some pictures of my baby coil. I built it a few years ago, and as of now it's part of a new twin system that is giving me a challenge.
Specs:
Power: 7500V 30mA NST
Secondary: 10" ~910 turns of 30ga wire on a ~1.9" PVC form
Top Load: Toroids 8" x 2" and 12" x 2"
Fres: ~415.024 kHz
Primary: .163" solid copper wire .2" spacing tapped between 7 and 8 turns
Tank Cap: MMC of cheap film caps .0106uF
Spark length: 15" of hot fat streamers. It's done a LOT better with a good ground connection.
Not a full-power run.
The new twin system has two coils identical to this one powered by two 7500V 30mA NSTs. I'll post pictures if/when I get it working.
Thanks. I'm looking forward to learning and growing through my membership here.
MMM
MadMrMike, Sun Aug 01 2010, 05:56PM
Hi, everyone!
This is my first post. I hope it's well received.
I figured I'd start off by posting some pictures of my baby coil. I built it a few years ago, and as of now it's part of a new twin system that is giving me a challenge.
Specs:
Power: 7500V 30mA NST
Secondary: 10" ~910 turns of 30ga wire on a ~1.9" PVC form
Top Load: Toroids 8" x 2" and 12" x 2"
Fres: ~415.024 kHz
Primary: .163" solid copper wire .2" spacing tapped between 7 and 8 turns
Tank Cap: MMC of cheap film caps .0106uF
Spark length: 15" of hot fat streamers. It's done a LOT better with a good ground connection.
Not a full-power run.
The new twin system has two coils identical to this one powered by two 7500V 30mA NSTs. I'll post pictures if/when I get it working.
Thanks. I'm looking forward to learning and growing through my membership here.
MMM
Re: ** Add your Tesla coil here **
modularduck, Sat Aug 28 2010, 11:48PM
So here is my latest project, still needs a bit of tuning, and some upgrades to achieve maximum streamer length. It was started amlost 2 years ago when i got laid off and had a bunch of free time and various materials laying around from prior projects. I intentional made the primary oversized and its not permenantly attached to the housing so i can experiment with different top loads and also coupling hight.
I'm going to change all the wiring to much heavier gauge at some point. along with adding a fan for quenching the gap. I have noticed that on longer runs the air becomes so ionized that performance suffers. Too, Im sure a proper HF ground will help a bunch.
I want to thank 4hv and its members for all of the information to be had here.
modularduck, Sat Aug 28 2010, 11:48PM
So here is my latest project, still needs a bit of tuning, and some upgrades to achieve maximum streamer length. It was started amlost 2 years ago when i got laid off and had a bunch of free time and various materials laying around from prior projects. I intentional made the primary oversized and its not permenantly attached to the housing so i can experiment with different top loads and also coupling hight.
I'm going to change all the wiring to much heavier gauge at some point. along with adding a fan for quenching the gap. I have noticed that on longer runs the air becomes so ionized that performance suffers. Too, Im sure a proper HF ground will help a bunch.
I want to thank 4hv and its members for all of the information to be had here.
Re: ** Add your Tesla coil here **
iceowl, Sun Aug 29 2010, 04:52PM
New Coil. After running a 4.5" dia 22" length secondary at 15/150 with a primary of 0.25" refrigeration tubing, I decided to step things up a quantum. This coil has a 6.5" secondary, 28" length. The primary is 12 turns of spring copper weather stripping interspaced with 0.25" insulating foam weatherstripping. The whole thing is sandwiched between 2 polycarbonate disks, and tapped with some modified pin vises. The gap is an SRSG running at 1800 rpm, 120bps.
All designed using JavaTC.
Spark lengths are somewhere between 50" and 60".
iceowl, Sun Aug 29 2010, 04:52PM
New Coil. After running a 4.5" dia 22" length secondary at 15/150 with a primary of 0.25" refrigeration tubing, I decided to step things up a quantum. This coil has a 6.5" secondary, 28" length. The primary is 12 turns of spring copper weather stripping interspaced with 0.25" insulating foam weatherstripping. The whole thing is sandwiched between 2 polycarbonate disks, and tapped with some modified pin vises. The gap is an SRSG running at 1800 rpm, 120bps.
All designed using JavaTC.
Spark lengths are somewhere between 50" and 60".
Re: ** Add your Tesla coil here **
GreenLab, Tue Sept 07 2010, 11:09PM
This is my newest coil
technical data:
typ= SGTC
HV source= neon sign transformer 6,3 kv/ 50 ma (160 ma)
MMC = 36 nf
sparc length = 47"
GreenLab, Tue Sept 07 2010, 11:09PM
This is my newest coil
technical data:
typ= SGTC
HV source= neon sign transformer 6,3 kv/ 50 ma (160 ma)
MMC = 36 nf
sparc length = 47"
Re: ** Add your Tesla coil here **
iceowl, Sun Sept 19 2010, 03:50AM
Eastern Voltage Research MicroBrute coil kit, at about 1/2 power. Photo by the wife.
iceowl, Sun Sept 19 2010, 03:50AM
Eastern Voltage Research MicroBrute coil kit, at about 1/2 power. Photo by the wife.
Re: ** Add your Tesla coil here **
GreenLab, Tue Sept 28 2010, 07:41PM
My little lightningmachine ;)
typ= small SGTC
hv source= 6kv 50 ma nst (extern)
static spark gap (6 gaps with tungsten electrodes)
GreenLab, Tue Sept 28 2010, 07:41PM
My little lightningmachine ;)
typ= small SGTC
hv source= 6kv 50 ma nst (extern)
static spark gap (6 gaps with tungsten electrodes)
Re: ** Add your Tesla coil here **
Joyeep, Sun Oct 10 2010, 01:40AM
class e oltc mini tc
Joyeep, Sun Oct 10 2010, 01:40AM
class e oltc mini tc
Re: ** Add your Tesla coil here **
iceowl, Sat Oct 23 2010, 03:32PM
My 5th attempt.
This coil has an 8.5"x34" secondary wound with 20ga thick build magnet wire. The top toroid is 6"x24" though I'm going to experiment with a bigger one made of aluminum air duct.
Same secondary as my prior coil - 1.25"x12" (inner) wound spring bronze spaced at 0.25", sandwiched between 2 polycarbonate disks. The secondary is resting atop 2" of LDPE to reduce the k, which I think was a partial contributor to the demise of Coil V4.
Running a pole pig. Tank is 0.06uf. ARSG.
Joe
iceowl, Sat Oct 23 2010, 03:32PM
My 5th attempt.
This coil has an 8.5"x34" secondary wound with 20ga thick build magnet wire. The top toroid is 6"x24" though I'm going to experiment with a bigger one made of aluminum air duct.
Same secondary as my prior coil - 1.25"x12" (inner) wound spring bronze spaced at 0.25", sandwiched between 2 polycarbonate disks. The secondary is resting atop 2" of LDPE to reduce the k, which I think was a partial contributor to the demise of Coil V4.
Running a pole pig. Tank is 0.06uf. ARSG.
Joe
Re: ** Add your Tesla coil here **
GreenLab, Sun Jan 23 2011, 11:15PM
Hi,
here is my new midi lightningmachine :)
Hv source = 500VA NST (tuned)
Capacitor = Wima FKP-1 stack- 50nF with bleeder resistors
Sekondary = diameter=4,3 inch / ∼800 wdg.
Topload = 9,8 inch sphere
Primary = inner diameter 6,3 inch / 6mm copper pipe
spark lenght = 55 inch (1400 mm)
Greets, GreenLab
GreenLab, Sun Jan 23 2011, 11:15PM
Hi,
here is my new midi lightningmachine :)
Hv source = 500VA NST (tuned)
Capacitor = Wima FKP-1 stack- 50nF with bleeder resistors
Sekondary = diameter=4,3 inch / ∼800 wdg.
Topload = 9,8 inch sphere
Primary = inner diameter 6,3 inch / 6mm copper pipe
spark lenght = 55 inch (1400 mm)
Greets, GreenLab
Re: ** Add your Tesla coil here **
Fabio, Sat Feb 12 2011, 10:56PM
Hi All!
This is the story of a restoration.
in principle there was only the residues of a badly modified Tesla Coil, all connections were messed up, the primary coil had been unwound, the secondary coil was missing........
Of course i had no problems for the rewiring and for the primary coil, i removed and taut the original wires and i reused the same wires for cabling everything with a better shape; the problem is only for the secondary
I find a piece of bakelite tube of the right shape and i decided to use it for this secondary.
First of all, i measured the resonant frequency of the primary circuit; the two leyden jars had a really small capacitance so the resonant frequency was quite high...... 1,95 MHz with the alligator clip connected to the last turn, i need few turns of a really thick wire for the secondary coil!!!!!
After some calculations i opted for 255 turns of 1,5mm double insulated magnet wire on a 6x40 cm coilform, now is time to wind!
Now i need a breakpoint, for aesthetic reasons i opted for a turned brass point mounted on a turned bakelite cap, the result is really beautiful; note on the second photo how is thick the secondary wire!
now is need a ground connection; i cannot use a modern socket so, one more time, brass and lathe seems the best mix
This is the overall results, some other minor aestetic modifications are required but is now in a working conditions and is also great work!
Don't expect a big performance from this coil, the energy stored in the leyden jars is really low, the two-balls spark gap suffer of many quenching problems, the resonant frequency is outrageous high and the Q factor of both LC circuits is quite low, this Tesla Coil is capable to make about 1cm of streamer and 2 cm of sparks over a grounded electrode (AKA my finger!) if powered with a 10kV OBIT and about 2 cm of streamers (plus an huge corona on the last turn) and 3 cm of sparks over my finger if powered with a Rumkorff coil.
i haven't take a pic of the discharge because is nothing special and is also very difficult to photograph (due to the EM field the camera hangs if I approach too)
Ciao!
Fabio.
Fabio, Sat Feb 12 2011, 10:56PM
Hi All!
This is the story of a restoration.
in principle there was only the residues of a badly modified Tesla Coil, all connections were messed up, the primary coil had been unwound, the secondary coil was missing........
Of course i had no problems for the rewiring and for the primary coil, i removed and taut the original wires and i reused the same wires for cabling everything with a better shape; the problem is only for the secondary
I find a piece of bakelite tube of the right shape and i decided to use it for this secondary.
First of all, i measured the resonant frequency of the primary circuit; the two leyden jars had a really small capacitance so the resonant frequency was quite high...... 1,95 MHz with the alligator clip connected to the last turn, i need few turns of a really thick wire for the secondary coil!!!!!
After some calculations i opted for 255 turns of 1,5mm double insulated magnet wire on a 6x40 cm coilform, now is time to wind!
Now i need a breakpoint, for aesthetic reasons i opted for a turned brass point mounted on a turned bakelite cap, the result is really beautiful; note on the second photo how is thick the secondary wire!
now is need a ground connection; i cannot use a modern socket so, one more time, brass and lathe seems the best mix
This is the overall results, some other minor aestetic modifications are required but is now in a working conditions and is also great work!
Don't expect a big performance from this coil, the energy stored in the leyden jars is really low, the two-balls spark gap suffer of many quenching problems, the resonant frequency is outrageous high and the Q factor of both LC circuits is quite low, this Tesla Coil is capable to make about 1cm of streamer and 2 cm of sparks over a grounded electrode (AKA my finger!) if powered with a 10kV OBIT and about 2 cm of streamers (plus an huge corona on the last turn) and 3 cm of sparks over my finger if powered with a Rumkorff coil.
i haven't take a pic of the discharge because is nothing special and is also very difficult to photograph (due to the EM field the camera hangs if I approach too)
Ciao!
Fabio.
Re: ** Add your Tesla coil here **
uitvinderalex, Sun Feb 13 2011, 03:01PM
After almost 3 years I finally finished my first SGTC totally made from perspex. It was a ridiculous amount of work to shape, sand and polish all the perspex components. It was build for the looks so I don't use a ground rail and an adjustable primary coil. The secondaire coil and torus are removable for transport. More pictures can be found on my site.
power = NST 8kV 63mA
sparkgap = tungsten rods + fan to increase breakdown voltage
spark length = about 50-60cm
Here is a nice picture when I was almost ready with building it. On the picture you see the SGTC upside down without the wheels.
In my opinion the sparkgap is the best looking part I made.
uitvinderalex, Sun Feb 13 2011, 03:01PM
After almost 3 years I finally finished my first SGTC totally made from perspex. It was a ridiculous amount of work to shape, sand and polish all the perspex components. It was build for the looks so I don't use a ground rail and an adjustable primary coil. The secondaire coil and torus are removable for transport. More pictures can be found on my site.
power = NST 8kV 63mA
sparkgap = tungsten rods + fan to increase breakdown voltage
spark length = about 50-60cm
Here is a nice picture when I was almost ready with building it. On the picture you see the SGTC upside down without the wheels.
In my opinion the sparkgap is the best looking part I made.
Re: ** Add your Tesla coil here **
Intra, Wed Apr 20 2011, 10:19AM
Intra, Wed Apr 20 2011, 10:19AM
Re: ** Add your Tesla coil here **
GreenLab, Wed May 11 2011, 11:18PM
hello,
here is my new over head tesla coil. I built it for a theatre in germany.
spark pics follow...
EDIT:
Final version
greets, GreenLab
GreenLab, Wed May 11 2011, 11:18PM
hello,
here is my new over head tesla coil. I built it for a theatre in germany.
spark pics follow...
EDIT:
Final version
greets, GreenLab
Re: ** Add your Tesla coil here **
Dieu, Mon May 16 2011, 11:46PM
Hello
Here are my SSTC, full bridge, resonance frequency- 117kHz without torus, spark length 20-25cm(10inch), capacitor-5uF/800V Rifa, antenna feedback, full bridge on FGA25N120ANTD igbt, fake safety ring is antenna :)
I hope it somehow looks like Dr spark project.
Dieu, Mon May 16 2011, 11:46PM
Hello
Here are my SSTC, full bridge, resonance frequency- 117kHz without torus, spark length 20-25cm(10inch), capacitor-5uF/800V Rifa, antenna feedback, full bridge on FGA25N120ANTD igbt, fake safety ring is antenna :)
I hope it somehow looks like Dr spark project.
Re: ** Add your Tesla coil here **
hsieh, Sun May 29 2011, 02:43PM
Portable demonstration tesla coil
Steve SSTC 5 schematic
500 turns secondary
resonant frequency 500KHZ
20N60A4 half bridge
5cm spark@110V AC input
GDT:EE16 EE ferrite core
secondary CT feedback
hsieh, Sun May 29 2011, 02:43PM
Portable demonstration tesla coil
Steve SSTC 5 schematic
500 turns secondary
resonant frequency 500KHZ
20N60A4 half bridge
5cm spark@110V AC input
GDT:EE16 EE ferrite core
secondary CT feedback
Re: ** Add your Tesla coil here **
Mads Barnkob, Fri Jul 22 2011, 11:55AM
Kaizer DRSSTC I
Thread:
All information and schematics etc:
Specifications
Resonant frequency
Around 70 KHz
Secondary
160 mm diameter x 605 mm height , 2200 turns of 0.25 mm enamelled wire
Topload
630 diameter x 130 mm ducting diameter, dryer ducting, this is subject to change
Primary
320 mm diameter x 150 mm height, 9 turns of 10 mm copper piping ~ 28,27 mm^2, tapped at 5.5
Bridge
Fullbridge of IXGN60N60C2D1 IGBTs, SOT-227 package
150 mm length x 80 mm width x 90 mm height, 1 KG of heatsink
2 x 3300uF 450V BHC capacitors for 6600uF bridge filtering. (each: ESR 39mOhm@100Hz, Z 27mOhm@10kHz and 53A Iripple@70KHz@50 Degrees celcius)
MMC
6 Strings of 2, 942C20P15K-F
0.45 uF rated 4000 V and 81 A Irms
Mads Barnkob, Fri Jul 22 2011, 11:55AM
Kaizer DRSSTC I
Thread:
All information and schematics etc:
Specifications
Resonant frequency
Around 70 KHz
Secondary
160 mm diameter x 605 mm height , 2200 turns of 0.25 mm enamelled wire
Topload
630 diameter x 130 mm ducting diameter, dryer ducting, this is subject to change
Primary
320 mm diameter x 150 mm height, 9 turns of 10 mm copper piping ~ 28,27 mm^2, tapped at 5.5
Bridge
Fullbridge of IXGN60N60C2D1 IGBTs, SOT-227 package
150 mm length x 80 mm width x 90 mm height, 1 KG of heatsink
2 x 3300uF 450V BHC capacitors for 6600uF bridge filtering. (each: ESR 39mOhm@100Hz, Z 27mOhm@10kHz and 53A Iripple@70KHz@50 Degrees celcius)
MMC
6 Strings of 2, 942C20P15K-F
0.45 uF rated 4000 V and 81 A Irms
Re: ** Add your Tesla coil here **
climatex, Mon Aug 15 2011, 12:42AM
My first tesla coil ever, it's a micro table-top VTTC.
Inspiration by Dr. Kilovolt.
Tube used is RFT PL 500; heater switchable on the fly between 27 and 30V.
Two-stage mains multiplier as the anode supply.
Possible to switch between quasi constant-wave and thyristor (SCR) cathode interrupter mode.
Fused mains supply (3A F) + cathode (315mA F).
Primary 16 turns, feedback 10, secondary >1100 (0.09mm wire). The secondary is 10cm tall on a diameter of 5 cm.
Resonant cap 2x paralleled WIMA FKP 1n5 1250V=
QCW mode dual 3.5-4cm streamers; 4.5 to ground; with a good breakout point, one 4.5cm free-to-air appears (pictured). Interrupter 6-7cm streamers both free-to-air and ground.
QCW with breakout point properly set.
Cathode interrupter.
Best regards climatex
climatex, Mon Aug 15 2011, 12:42AM
My first tesla coil ever, it's a micro table-top VTTC.
Inspiration by Dr. Kilovolt.
Tube used is RFT PL 500; heater switchable on the fly between 27 and 30V.
Two-stage mains multiplier as the anode supply.
Possible to switch between quasi constant-wave and thyristor (SCR) cathode interrupter mode.
Fused mains supply (3A F) + cathode (315mA F).
Primary 16 turns, feedback 10, secondary >1100 (0.09mm wire). The secondary is 10cm tall on a diameter of 5 cm.
Resonant cap 2x paralleled WIMA FKP 1n5 1250V=
QCW mode dual 3.5-4cm streamers; 4.5 to ground; with a good breakout point, one 4.5cm free-to-air appears (pictured). Interrupter 6-7cm streamers both free-to-air and ground.
QCW with breakout point properly set.
Cathode interrupter.
Best regards climatex
Re: ** Add your Tesla coil here **
MRacerxdl, Wed Aug 31 2011, 07:35PM
My first *goodworkingdrsstc* - I'm really proud of it, and I called it ZARC DRSSTC:
Specs:
Secondary: 45x15 cm with 30AWG Wire (60cm total height of secondary)
Fres: 90kHz
MMC Bank: 117,5nF 3200V (5x2 of 47nF 1600V)
Primary Peak Current: About 250A running without OCD
Fullbridge of IRG4PC50UD running at 320VDC Bus
About 1.2 meter sparks :O
Audio Modulated :D
Videos:
MRacerxdl, Wed Aug 31 2011, 07:35PM
My first *goodworkingdrsstc* - I'm really proud of it, and I called it ZARC DRSSTC:
Specs:
Secondary: 45x15 cm with 30AWG Wire (60cm total height of secondary)
Fres: 90kHz
MMC Bank: 117,5nF 3200V (5x2 of 47nF 1600V)
Primary Peak Current: About 250A running without OCD
Fullbridge of IRG4PC50UD running at 320VDC Bus
About 1.2 meter sparks :O
Audio Modulated :D
Videos:
Re: ** Add your Tesla coil here **
Extreme Electronics, Tue Sept 20 2011, 08:23PM
Haven't posted for a while, though Id update with my latest coil a Steampunked SSTC "The Aetheriser"
SSTC Control, Micro processor, Bluttooth remote, bridge, Etc..
Aetherising... & illuminations...
Topload Detail
More Steampunked coil detail at www.aetheriser.co.uk
More Real Details at www.aetheriser.co.uk/index.php?page=real
Extreme Electronics, Tue Sept 20 2011, 08:23PM
Haven't posted for a while, though Id update with my latest coil a Steampunked SSTC "The Aetheriser"
SSTC Control, Micro processor, Bluttooth remote, bridge, Etc..
Aetherising... & illuminations...
Topload Detail
More Steampunked coil detail at www.aetheriser.co.uk
More Real Details at www.aetheriser.co.uk/index.php?page=real
Re: ** Add your Tesla coil here **
Mads Barnkob, Tue Oct 25 2011, 01:51PM
Kaizer DRSSTC II
Full article with all pictures, construction etc:
Bridge
2x IXGN60N60C2D1 IGBTs in a half bridge configuration
Bridge supply
0 – 210VAC through a variac, 6A rectifier bridge and 2x Aerovox 410uF 430V filtering capacitors in parallel.
Primary coil
Flat primary. Inner diameter 70 mm, Outer diameter 187,36 mm. 6 turns 1,78 mm copper wire (2,5 mm²), turn spacing 8 mm. Tapped at 4.8 turns.
MMC
2 in series Cornell Dubilier (CDE) 942C20P15K-F capacitors for 0.075uF at 4000VDC rating.
Secondary coil
50 mm diameter, 200 mm long, 1430 windings, 0,127 mm enamelled copper wire.
Resonant frequency
Around 327 kHz.
Topload
40 x 215 mm aluminium tape on a Styrofoam toroid.
Input power
350BPS, 120uS ontime, 35 primary cycles, 280A limiter: 210 VAC in at 2A. 420 Watt.
Spark length
Up to 370 mm long sparks.
Mads Barnkob, Tue Oct 25 2011, 01:51PM
Kaizer DRSSTC II
Full article with all pictures, construction etc:
Bridge
2x IXGN60N60C2D1 IGBTs in a half bridge configuration
Bridge supply
0 – 210VAC through a variac, 6A rectifier bridge and 2x Aerovox 410uF 430V filtering capacitors in parallel.
Primary coil
Flat primary. Inner diameter 70 mm, Outer diameter 187,36 mm. 6 turns 1,78 mm copper wire (2,5 mm²), turn spacing 8 mm. Tapped at 4.8 turns.
MMC
2 in series Cornell Dubilier (CDE) 942C20P15K-F capacitors for 0.075uF at 4000VDC rating.
Secondary coil
50 mm diameter, 200 mm long, 1430 windings, 0,127 mm enamelled copper wire.
Resonant frequency
Around 327 kHz.
Topload
40 x 215 mm aluminium tape on a Styrofoam toroid.
Input power
350BPS, 120uS ontime, 35 primary cycles, 280A limiter: 210 VAC in at 2A. 420 Watt.
Spark length
Up to 370 mm long sparks.
Re: ** Add your Tesla coil here **
Cain, Wed Nov 02 2011, 01:19PM
a short vid of my dual MOT ASRG coil 6" secondary
+medium
Cain, Wed Nov 02 2011, 01:19PM
a short vid of my dual MOT ASRG coil 6" secondary
+medium
Re: ** Add your Tesla coil here **
zzz_julian_zzz, Fri Jan 06 2012, 01:54AM
ADD COIL: PHILIPPINE DRSSTC
SPECS:
spark: 35 inches (MAX)
fres: ~200khz
bridge: Full/ IRG4PF50W / D
primary: 6t #10awg (6 inch O.D.)
tank cap: 75nf / 4kV DC
coupling: .15
secondary: 1200t #32awg (10 inch x 4 inch O.D.)
toroid: 13 inch x 2.2 inch (larger)// 8inch 2.5 inch(smaller)
filter cap: 4000uf / 350vDC
power in: <500 watts
driver: Discrete driver/ with logic and primary feeded// w/o OCD & synchronizer
interrupter: Basic (20 - 200 bps/ 50 us - max on time)
GDT: black/ unknown specs & material
PLEASE WATCH THE VIDEO
zzz_julian_zzz, Fri Jan 06 2012, 01:54AM
ADD COIL: PHILIPPINE DRSSTC
SPECS:
spark: 35 inches (MAX)
fres: ~200khz
bridge: Full/ IRG4PF50W / D
primary: 6t #10awg (6 inch O.D.)
tank cap: 75nf / 4kV DC
coupling: .15
secondary: 1200t #32awg (10 inch x 4 inch O.D.)
toroid: 13 inch x 2.2 inch (larger)// 8inch 2.5 inch(smaller)
filter cap: 4000uf / 350vDC
power in: <500 watts
driver: Discrete driver/ with logic and primary feeded// w/o OCD & synchronizer
interrupter: Basic (20 - 200 bps/ 50 us - max on time)
GDT: black/ unknown specs & material
PLEASE WATCH THE VIDEO
Re: ** Add your Tesla coil here **
medved, Thu Jan 19 2012, 07:50PM
VTTC
Vacuum tube: 2x 6P45S parallel
Secondary coil: 6,3x25cm, unknown number of turns
Primary coil: 22 turns
Feedback: 18 turns
Input power: 1,5kVA, 1 MOT
Filtering cap: 670nF
Spark length: 34 cm
Resonant cap: 2,6nF (14x 36nF/1500V= ISKRA in series)
medved, Thu Jan 19 2012, 07:50PM
VTTC
Vacuum tube: 2x 6P45S parallel
Secondary coil: 6,3x25cm, unknown number of turns
Primary coil: 22 turns
Feedback: 18 turns
Input power: 1,5kVA, 1 MOT
Filtering cap: 670nF
Spark length: 34 cm
Resonant cap: 2,6nF (14x 36nF/1500V= ISKRA in series)
Re: ** Add your Tesla coil here **
medved, Mon Feb 20 2012, 11:51PM
Hello, this is my new BIG VTTC
Vacuum tube: pulsed triode GI-19B
Secondary coil: 11x55cm, number of turns ~1100
Primary coil: 37 turns
Feedback: 8 turns
Input power: 5,2kVA
Filtering cap: 300nF
Spark length: 70 cm
Resonant cap: 0,666nF
medved, Mon Feb 20 2012, 11:51PM
Hello, this is my new BIG VTTC
Vacuum tube: pulsed triode GI-19B
Secondary coil: 11x55cm, number of turns ~1100
Primary coil: 37 turns
Feedback: 8 turns
Input power: 5,2kVA
Filtering cap: 300nF
Spark length: 70 cm
Resonant cap: 0,666nF
Re: ** Add your Tesla coil here **
Extreme Electronics, Mon Apr 09 2012, 08:08AM
HALO - SSTC with a motor driven synchronised breakout
Primary: 20T 1mm copper wire.
Secondary: 300mm tall, ~900T enamelled wire on 75mm diameter cardboard former, wound with 0.225mm Wire.
Topload: 300mm toroid made from pie dishes and 100mm diameter ventilation duct coated with aluminium foil.
Power: rectified mains ~1.5KW
Fibre link to PC allows positioning of the breakout in real time (see video)
More detail at Extreme Electronics - Halo Tesla coil
Video: Halo Video
Extreme Electronics, Mon Apr 09 2012, 08:08AM
HALO - SSTC with a motor driven synchronised breakout
Primary: 20T 1mm copper wire.
Secondary: 300mm tall, ~900T enamelled wire on 75mm diameter cardboard former, wound with 0.225mm Wire.
Topload: 300mm toroid made from pie dishes and 100mm diameter ventilation duct coated with aluminium foil.
Power: rectified mains ~1.5KW
Fibre link to PC allows positioning of the breakout in real time (see video)
More detail at Extreme Electronics - Halo Tesla coil
Video: Halo Video
Re: ** Add your Tesla coil here **
TeslaJunky, Thu Apr 12 2012, 09:24PM
MONSTER Coil in my Driveway:
Unbelievable output.
Specs are in the video:
TeslaJunky, Thu Apr 12 2012, 09:24PM
MONSTER Coil in my Driveway:
Unbelievable output.
Specs are in the video:
Re: ** Add your Tesla coil here **
RateReducer, Thu Apr 26 2012, 07:47PM
Hi, 4HV members!
I am Daniel from Austria. I just joined the forum.
Here are some coils that i built. Enjoy!
modulated GU50 plasmaspeaker:
GK71 tweeter:
modulated GK71 tweeter:
GU81 VTTC with staccato:
polyphonic MIDI DRSSTC:
DRSSTC monophon with high power
and finaly my new DRSSTC (under construction):
greetings
RateReducer, Thu Apr 26 2012, 07:47PM
Hi, 4HV members!
I am Daniel from Austria. I just joined the forum.
Here are some coils that i built. Enjoy!
modulated GU50 plasmaspeaker:
GK71 tweeter:
modulated GK71 tweeter:
GU81 VTTC with staccato:
polyphonic MIDI DRSSTC:
DRSSTC monophon with high power
and finaly my new DRSSTC (under construction):
greetings
Re: ** Add your Tesla coil here **
Dr. Dark Current, Fri May 18 2012, 03:47PM
A vacuum tube Tesla coil project I finished recently.
Specs
Vacuum tube: GU-81M Russian pentode
Power supply: Huge 2300V 1000mA rated MOT, half wave doubled
Input power total: 1800W / 2200VA
Tank capacitor: 1.6nF (1600pf) 11.5kV~ RF ceramic
Coils: primary 125mm PVC former, 35 turns; secondary: 60mm porcellain former, 300mm winding of cotton coated wire
Spark length: 60cm (24")
Continuous operation - no stacatto, tube plate gets barely red in darkness after a few minutes.
Youtube vid:
.
Dr. Dark Current, Fri May 18 2012, 03:47PM
A vacuum tube Tesla coil project I finished recently.
Specs
Vacuum tube: GU-81M Russian pentode
Power supply: Huge 2300V 1000mA rated MOT, half wave doubled
Input power total: 1800W / 2200VA
Tank capacitor: 1.6nF (1600pf) 11.5kV~ RF ceramic
Coils: primary 125mm PVC former, 35 turns; secondary: 60mm porcellain former, 300mm winding of cotton coated wire
Spark length: 60cm (24")
Continuous operation - no stacatto, tube plate gets barely red in darkness after a few minutes.
Youtube vid:
.
Re: ** Add your Tesla coil here **
Neet Studio, Wed May 23 2012, 08:31PM
My first working SSTC coil. I went out of 30AWG wire wrap wire. The top load was a soup scope from a dollar store,
Small PCB is the oscillator + driver + GDT. The coil form is from HP plotter paper reel.
The updated version uses a PLL to lock the frequency upgrade to a cheap pot lip as the top load. The coil, top load are fiction fit; driver, fan are fastern with 4 stand-offs as nuts so the whole thing can be disassembled easily.
This is the view of from the bottom. There is a fan that sucks air from the heat sink and blow them upward through the spokes vertically towards the lower part of the coil. I can feel a little bit of air flow even towards to top load. I had to find a fan that isn't affected by the RFI. :)
It can run for hours. Resonant frequency is just above 600kHz. Good old BUZ11 are rated for 50V and I have been running them at 50V quite a lot. I only blown them one time when I cranked it to 60V.
A wind mill propelled by the streamers.
I have collected some IRFP260, I could do a better one. I don't want too much ozone in an apartment or upset the AM frequency, so it spend most of its time sitting on a shelf. :(
Neet Studio, Wed May 23 2012, 08:31PM
My first working SSTC coil. I went out of 30AWG wire wrap wire. The top load was a soup scope from a dollar store,
Small PCB is the oscillator + driver + GDT. The coil form is from HP plotter paper reel.
The updated version uses a PLL to lock the frequency upgrade to a cheap pot lip as the top load. The coil, top load are fiction fit; driver, fan are fastern with 4 stand-offs as nuts so the whole thing can be disassembled easily.
This is the view of from the bottom. There is a fan that sucks air from the heat sink and blow them upward through the spokes vertically towards the lower part of the coil. I can feel a little bit of air flow even towards to top load. I had to find a fan that isn't affected by the RFI. :)
It can run for hours. Resonant frequency is just above 600kHz. Good old BUZ11 are rated for 50V and I have been running them at 50V quite a lot. I only blown them one time when I cranked it to 60V.
A wind mill propelled by the streamers.
I have collected some IRFP260, I could do a better one. I don't want too much ozone in an apartment or upset the AM frequency, so it spend most of its time sitting on a shelf. :(
Re: ** Add your Tesla coil here **
GreenLab, Sat Jun 23 2012, 10:28AM
This SRSGTC I had built with a friend ("Teslatool" germany).
This is the first successful run with synchronus spark gap @ 200 bps.
Secondary:
• Diameter = 160 mm
• Turns = 840
• Toroid = 210 mm * 800 mm
• Resonantfrequenzy = 160 kHz
Primary:
• 10 mm coppertube
• 7 windings
200 BPS RSG:
• The motor is a 200W / 3000 rpm synchronus motor (doublegrinder which I have cut two flats).
HV source:
• Two PT`s 11,5 kV / 4,6 kVA (on video) with adjustable ballast. Operation with 6,9 kVA and more possible.
Tank Cap:
• Wima FKP-1 MMC / ±100 nF
Greets, GreenLab
GreenLab, Sat Jun 23 2012, 10:28AM
This SRSGTC I had built with a friend ("Teslatool" germany).
This is the first successful run with synchronus spark gap @ 200 bps.
Secondary:
• Diameter = 160 mm
• Turns = 840
• Toroid = 210 mm * 800 mm
• Resonantfrequenzy = 160 kHz
Primary:
• 10 mm coppertube
• 7 windings
200 BPS RSG:
• The motor is a 200W / 3000 rpm synchronus motor (doublegrinder which I have cut two flats).
HV source:
• Two PT`s 11,5 kV / 4,6 kVA (on video) with adjustable ballast. Operation with 6,9 kVA and more possible.
Tank Cap:
• Wima FKP-1 MMC / ±100 nF
Greets, GreenLab
Re: ** Add your Tesla coil here **
geobruce, Mon Sept 17 2012, 03:53PM
I've made a Tesla coil with a neighbor of me.
Specs:
- Nst 4000V 50mA 200VA
- Wine bottle capacitors 24 bottles for 20nF
- Secondary 1250 turns of 0.3mm wire
- Top load is biggest salad bowl of Ikea
pictures:
-
-
-
video's:
-
geobruce, Mon Sept 17 2012, 03:53PM
I've made a Tesla coil with a neighbor of me.
Specs:
- Nst 4000V 50mA 200VA
- Wine bottle capacitors 24 bottles for 20nF
- Secondary 1250 turns of 0.3mm wire
- Top load is biggest salad bowl of Ikea
pictures:
-
-
-
video's:
-
Re: ** Add your Tesla coil here **
Physics Junkie, Tue Nov 13 2012, 07:52PM
Physics Junkie, Tue Nov 13 2012, 07:52PM
Re: ** Add your Tesla coil here **
OnTheWaterfront, Thu Nov 22 2012, 02:08AM
Powered by a ZVS driven flyback transformer 16nf MMC cap, 3.5" diameter secondary 17" high. 10 awg primary.
OnTheWaterfront, Thu Nov 22 2012, 02:08AM
Powered by a ZVS driven flyback transformer 16nf MMC cap, 3.5" diameter secondary 17" high. 10 awg primary.
Re: ** Add your Tesla coil here **
rulmismo, Sat Feb 09 2013, 03:45PM
First SSGTC rulmismo1
Specs:
550mm secondary height with 30cm toroid
900turns 0.5mm
38nF, MMC, (problems with parasitic inductance, probably due to zig-zag mounting)
380kHz
25-30cm sparks
primary, 3.3 turns of plain 16mm2 wire
8kV 20mA NST
http://youtu.be/G0mHsPRLULU
rulmismo, Sat Feb 09 2013, 03:45PM
First SSGTC rulmismo1
Specs:
550mm secondary height with 30cm toroid
900turns 0.5mm
38nF, MMC, (problems with parasitic inductance, probably due to zig-zag mounting)
380kHz
25-30cm sparks
primary, 3.3 turns of plain 16mm2 wire
8kV 20mA NST
http://youtu.be/G0mHsPRLULU
Re: ** Add your Tesla coil here **
GreenLab, Sun Mar 24 2013, 10:34AM
Hello,
here is my new acrylic static-SGTC :).
The frame is made of 20 mm thick acrylic and only finest materials were used.
More pictures on my facebook page.
many greets GreenLab,
GreenLab, Sun Mar 24 2013, 10:34AM
Hello,
here is my new acrylic static-SGTC :).
The frame is made of 20 mm thick acrylic and only finest materials were used.
More pictures on my facebook page.
many greets GreenLab,
Re: ** Add your Tesla coil here **
Apparition, Tue May 21 2013, 10:15AM
My mini SSTC
This is my first real tesla coil.
The base allows for changeable primary and secondary coils.
Apparition, Tue May 21 2013, 10:15AM
My mini SSTC
This is my first real tesla coil.
The base allows for changeable primary and secondary coils.
Re: ** Add your Tesla coil here **
Mr.Black, Sun May 26 2013, 08:22PM
My first DRSSTC V1.1&V1.2
My flickr：http://www.flickr.com/photos/blacksama-hv/
Mr.Black, Sun May 26 2013, 08:22PM
My first DRSSTC V1.1&V1.2
My flickr：http://www.flickr.com/photos/blacksama-hv/
Re: ** Add your Tesla coil here **
Physics Junkie, Sun Jun 09 2013, 07:36AM
My latest DRSSTC.
Full bridge of CM400DY-24A.
.24uF Tank Capacitance.
Secondary is 2400 turns of 30AWG on 6" diameter cardboard mailing tube. Double toroid system.
Resonant Frequency 58kHz. My next upgrade is to make larger toroids and try to drop the freq to at least 50kHz.
Primary tuned about 21-22% low.
K=.13
Driver is the UD2.5. OCD set to about 1000A
Typical interruption is between 180-225uS PW @ 100Hz
Best spark so far is 7ft approximately. Lots of adjustments still need to be made and I think I can get longer sparks with some finer tuning. The current signal also shows evidence that it could be tuned slightly lower.
Physics Junkie, Sun Jun 09 2013, 07:36AM
My latest DRSSTC.
Full bridge of CM400DY-24A.
.24uF Tank Capacitance.
Secondary is 2400 turns of 30AWG on 6" diameter cardboard mailing tube. Double toroid system.
Resonant Frequency 58kHz. My next upgrade is to make larger toroids and try to drop the freq to at least 50kHz.
Primary tuned about 21-22% low.
K=.13
Driver is the UD2.5. OCD set to about 1000A
Typical interruption is between 180-225uS PW @ 100Hz
Best spark so far is 7ft approximately. Lots of adjustments still need to be made and I think I can get longer sparks with some finer tuning. The current signal also shows evidence that it could be tuned slightly lower.
Re: ** Add your Tesla coil here **
GreenLab, Wed Jun 26 2013, 08:45PM
Here is my medium SRSGTC @ low power test.
On the image runs the tesla with 2,3kVA. The output is ~59"
I edit new images on full power in this post when I have them.
Specs:
- Resonat frequency = 222kHz
- Two 8kV NST's in parallel
- Tank-Cap = 62,5nF / 20,8kV (WIMA FKP - 1).
- Gap = 1500 RPM sync-gap @ 200BPS with tungsten rods
- RC filter
- Switchable ballast
- 6.3 "sekondary with 11.8" sphere-top
The fan on the image was only to test and has been removed.
GreenLab
GreenLab, Wed Jun 26 2013, 08:45PM
Here is my medium SRSGTC @ low power test.
On the image runs the tesla with 2,3kVA. The output is ~59"
I edit new images on full power in this post when I have them.
Specs:
- Resonat frequency = 222kHz
- Two 8kV NST's in parallel
- Tank-Cap = 62,5nF / 20,8kV (WIMA FKP - 1).
- Gap = 1500 RPM sync-gap @ 200BPS with tungsten rods
- RC filter
- Switchable ballast
- 6.3 "sekondary with 11.8" sphere-top
The fan on the image was only to test and has been removed.
GreenLab
Re: ** Add your Tesla coil here **
Feathers, Wed Jul 03 2013, 04:23PM
The large, 3600 watt green coil I've just finished. 75KHz Fres with CM300DY-12H IGBTs on a 400v buss. Arcs up to 60-65" long. Building a red twin at the moment!
Untitled by HighVoltageFeathers, on Flickr
Feathers, Wed Jul 03 2013, 04:23PM
The large, 3600 watt green coil I've just finished. 75KHz Fres with CM300DY-12H IGBTs on a 400v buss. Arcs up to 60-65" long. Building a red twin at the moment!
Untitled by HighVoltageFeathers, on Flickr
Re: ** Add your Tesla coil here **
redruM69, Wed Aug 28 2013, 03:48AM
Hey guys, this is my Dual MOT 5.25" ASRSG coil I've been tinkering on lately. It was originally syncronous, but performance wasnt so great. After some great advice from the folks on the TCML, I converted to asynch with awesome results!
Unballasted dual mot supply. Primaries paralleled in opposing phase, secondaries in series. No filters, but it does have a PFC cap. Running of a large powerstat I found. No specs, but probably 30A@240v. Im running on a 120v@20a circuit, and it pops my breaker after about 30 seconds.
131nf 942c based cap. 7 strings of 8. I did originally have 10 strings of 8 for 188nf, but downsized during troubleshooting and converting from SRSG to ASRSG.
RSG made from a big DC motor I had laying around. 6" rotor made from 3/8" CE Phenolic. 4 flying 1/8" tungsten electrodes. 2 stationary 1/4" tungsten electrodes. Speed is controlled with a small variac running a transformer which output is rectified and smoothed with some lytics I had laying around.
Primary is 3/8" copper tubing.
5.25"x24" secondary, 22awg. Wound on some yellow plastic safety pole I found.
Lower toroid is a 4.5"x18" spun aluminum from eastern voltage. Ended up being way too small so I added....
Upper toroid is a 6"x28" flex duct.
Streamers are about 55", and I expect a little longer with a less leaky topload! I'm currently working with a local metal spinning shop to make me a 6.5"x26" toroid. After the initial die is created, they can create several more for a nominal price. I may end up reselling these!
redruM69, Wed Aug 28 2013, 03:48AM
Hey guys, this is my Dual MOT 5.25" ASRSG coil I've been tinkering on lately. It was originally syncronous, but performance wasnt so great. After some great advice from the folks on the TCML, I converted to asynch with awesome results!
Unballasted dual mot supply. Primaries paralleled in opposing phase, secondaries in series. No filters, but it does have a PFC cap. Running of a large powerstat I found. No specs, but probably 30A@240v. Im running on a 120v@20a circuit, and it pops my breaker after about 30 seconds.
131nf 942c based cap. 7 strings of 8. I did originally have 10 strings of 8 for 188nf, but downsized during troubleshooting and converting from SRSG to ASRSG.
RSG made from a big DC motor I had laying around. 6" rotor made from 3/8" CE Phenolic. 4 flying 1/8" tungsten electrodes. 2 stationary 1/4" tungsten electrodes. Speed is controlled with a small variac running a transformer which output is rectified and smoothed with some lytics I had laying around.
Primary is 3/8" copper tubing.
5.25"x24" secondary, 22awg. Wound on some yellow plastic safety pole I found.
Lower toroid is a 4.5"x18" spun aluminum from eastern voltage. Ended up being way too small so I added....
Upper toroid is a 6"x28" flex duct.
Streamers are about 55", and I expect a little longer with a less leaky topload! I'm currently working with a local metal spinning shop to make me a 6.5"x26" toroid. After the initial die is created, they can create several more for a nominal price. I may end up reselling these!
Re: ** Add your Tesla coil here **
loneoceans, Tue Oct 01 2013, 02:47PM
Hi everyone. Presenting Tesla Coil 1 - 40mm.
This was the first Tesla Coil I built back in 2003.
More details here:
- Max spark length – 27cm with 180W input
- 236 x 40mm Secondary Coil
- 32AWG, ~1156 turns with 99% fill
- 12kVDC 17.625nF MMC with 24 47nF 1.5kV RS Polyproylene capacitors
- Inverse ~18 deg Conical Spiral Primary Coil tapped at turn 5.75 out of about 8.5 turns
- Primary 10cm ID, 24 OD, 3mm copper tubing with 6mm spacing
- Double Topload, 32 x 5cm and 23 x 5.5cm (runs fine with just the small one)
- Copper Pipe Multi-gap fan quenched Spark Gap
- 6kVAC 30mA NST power supply
- Java TC gives 518kHz fres
This was originally built with a 225W (7.5kV 30mA) NST as a power source, but after it gave up, it now runs on a smaller NST. Performance isn't fantastic, but it was a great learning experience. It has been 10 years since, but it still runs great!
loneoceans, Tue Oct 01 2013, 02:47PM
Hi everyone. Presenting Tesla Coil 1 - 40mm.
This was the first Tesla Coil I built back in 2003.
More details here:
- Max spark length – 27cm with 180W input
- 236 x 40mm Secondary Coil
- 32AWG, ~1156 turns with 99% fill
- 12kVDC 17.625nF MMC with 24 47nF 1.5kV RS Polyproylene capacitors
- Inverse ~18 deg Conical Spiral Primary Coil tapped at turn 5.75 out of about 8.5 turns
- Primary 10cm ID, 24 OD, 3mm copper tubing with 6mm spacing
- Double Topload, 32 x 5cm and 23 x 5.5cm (runs fine with just the small one)
- Copper Pipe Multi-gap fan quenched Spark Gap
- 6kVAC 30mA NST power supply
- Java TC gives 518kHz fres
This was originally built with a 225W (7.5kV 30mA) NST as a power source, but after it gave up, it now runs on a smaller NST. Performance isn't fantastic, but it was a great learning experience. It has been 10 years since, but it still runs great!
Re: ** Add your Tesla coil here **
loneoceans, Tue Oct 01 2013, 02:49PM
Hi everyone!
Presenting my DRSSTC 2. This was built in the spring of 2013 and the project started with the goal of making my first tesla coil using brick-style IGBTs.
Schematics and Construction Details etc are on my website:
And here are the photos of it in action:
First Version
The project began when I bought two Toshiba IGBT half-bridge modules on ebay, good for 150A 600V. The original plan was to build a compact and powerful DRSSTC running this full bridge, with about a foot long secondary. The coil also uses a revised version of Steve Ward’s UD2 as the driver. After many months of work, I finally got everything put together. Unfortunately, initial tests were worrying, and I soon found out that one of my IGBTs was half-dead. With the lack of time and money, I wasn’t able to continue with these bricks.
Revision 2
I managed to get hold of a CM200DU-24F 200A 1200V IGBT and decided to make a half-bridge coil instead. The CM200 bricks are larger, so I wasn’t able to fit a fullbridge inside the box I had already made. Finally, this worked perfectly and everything came together.
Specifications:
- CM200DU-24F 1200V 200A Half Bridge IGBT, RTC disabled
- 1875uF 350VDC Bus Capacitor x2 in series (voltage doubler)
- 0.154uF (measured) 8kVDC MMC made of CDE 942C capacitors
- Flat Spiral Primary, 0.25" Copper Tubing, 9 turns tapped at 8 for 108kHz
- 13 x 3.5" Secondary, AWG 34, ~2050 turns
- 4" x 17" Toroid, Aluminium Ducting
- 110kHz resonant frequency calculated (secondary)
- 10-150us pulse-width time, controlled via optical input
- Designed for 240VAC input max for 678VDC on the bus (half bridge)
- Spark length - almost 5 feet to air at 208VAC input
- Ground strikes - >51" recorded (keeps wanting to hit the floor!)
Here's a video of a quick test of it running. Need to find a new larger space.
It has been a great learning experience and I would like to thank the members of the 4hv community especially Steve and Phillip for their great advice and help! Without their help, this project would not have been so successful.
More to come soon with possibly a spun toroid to top it off.
loneoceans, Tue Oct 01 2013, 02:49PM
Hi everyone!
Presenting my DRSSTC 2. This was built in the spring of 2013 and the project started with the goal of making my first tesla coil using brick-style IGBTs.
Schematics and Construction Details etc are on my website:
And here are the photos of it in action:
First Version
The project began when I bought two Toshiba IGBT half-bridge modules on ebay, good for 150A 600V. The original plan was to build a compact and powerful DRSSTC running this full bridge, with about a foot long secondary. The coil also uses a revised version of Steve Ward’s UD2 as the driver. After many months of work, I finally got everything put together. Unfortunately, initial tests were worrying, and I soon found out that one of my IGBTs was half-dead. With the lack of time and money, I wasn’t able to continue with these bricks.
Revision 2
I managed to get hold of a CM200DU-24F 200A 1200V IGBT and decided to make a half-bridge coil instead. The CM200 bricks are larger, so I wasn’t able to fit a fullbridge inside the box I had already made. Finally, this worked perfectly and everything came together.
Specifications:
- CM200DU-24F 1200V 200A Half Bridge IGBT, RTC disabled
- 1875uF 350VDC Bus Capacitor x2 in series (voltage doubler)
- 0.154uF (measured) 8kVDC MMC made of CDE 942C capacitors
- Flat Spiral Primary, 0.25" Copper Tubing, 9 turns tapped at 8 for 108kHz
- 13 x 3.5" Secondary, AWG 34, ~2050 turns
- 4" x 17" Toroid, Aluminium Ducting
- 110kHz resonant frequency calculated (secondary)
- 10-150us pulse-width time, controlled via optical input
- Designed for 240VAC input max for 678VDC on the bus (half bridge)
- Spark length - almost 5 feet to air at 208VAC input
- Ground strikes - >51" recorded (keeps wanting to hit the floor!)
Here's a video of a quick test of it running. Need to find a new larger space.
It has been a great learning experience and I would like to thank the members of the 4hv community especially Steve and Phillip for their great advice and help! Without their help, this project would not have been so successful.
More to come soon with possibly a spun toroid to top it off.
Re: ** Add your Tesla coil here **
loneoceans, Tue Oct 01 2013, 03:11PM
Introducing my first DRSSTC. It’s a small tesla coil made to be portable, and also plays music!. Overall, the project was a success and was a great learning experience. This coil was built in early 2013.
Website with more details here:
As a learning experience, I wanted to go for something simple and nothing too fancy. I’ve had the fortune of being in the good company of other brilliant coilers (like Bayley, Tyler, Kramnik), and managed to get an older version of the oneTesla driver PCB, which runs this coil! I faced a couple of problems while building the coil but I’ve modified some parts and managed to get the coil working very well! Many thanks to Bayley for advice and help to get it working. See the video of it in action here:
Important specifications including calcs from JavaTC:
- Max spark length – I don’t know yet, does >22″ sparks to free air and ground with ~100us on-time.
- 222kHz resonant frequency (within 1%)
- 2.4″ Diameter PVC Secondary, ~2000 turns of AWG36 for a 10.25″ length
- 3.5″ Diameter Acrylic Primary, 6 turns of AWG 14 for about 0.8″ length
- Single 0.101uF 2kVDC 942C CDE Primary Capacitor
- 340VDC (120VAC rectified and doubled)
- Roughly 100us on-time (in the photos here)
- 2.2″ x 8″ AmazingOne spun toroid
- Half Bridge of 60N65 IGBTs (seems to be similar to the 60N60 TO247 IGBTs)
- Coupling = 0.22
- Energy Transfer time = 9.87us
Performance has been pretty good. Originally, the coil used a 0.068uF 940C capacitor but that made my primary frequency about 19% too high and I lost a 60N60 half bridge. Increasing the primary to 8 turns of 14AWG (k=0.26) turned out to be a bad idea and I had a lot of racing sparks. After a few more coats of Polyurethane on the secondary, a return to 6 turns of AWG14 and a larger tank cap, the coil is in tune with a performance I’m very happy with.
This coil currently has a tiny built-in 19VDC laptop power supply for the electronics which uses the famed UCCs from TI as gate drivers to a GDT driving the gates of the IGBTs.
loneoceans, Tue Oct 01 2013, 03:11PM
Introducing my first DRSSTC. It’s a small tesla coil made to be portable, and also plays music!. Overall, the project was a success and was a great learning experience. This coil was built in early 2013.
Website with more details here:
As a learning experience, I wanted to go for something simple and nothing too fancy. I’ve had the fortune of being in the good company of other brilliant coilers (like Bayley, Tyler, Kramnik), and managed to get an older version of the oneTesla driver PCB, which runs this coil! I faced a couple of problems while building the coil but I’ve modified some parts and managed to get the coil working very well! Many thanks to Bayley for advice and help to get it working. See the video of it in action here:
Important specifications including calcs from JavaTC:
- Max spark length – I don’t know yet, does >22″ sparks to free air and ground with ~100us on-time.
- 222kHz resonant frequency (within 1%)
- 2.4″ Diameter PVC Secondary, ~2000 turns of AWG36 for a 10.25″ length
- 3.5″ Diameter Acrylic Primary, 6 turns of AWG 14 for about 0.8″ length
- Single 0.101uF 2kVDC 942C CDE Primary Capacitor
- 340VDC (120VAC rectified and doubled)
- Roughly 100us on-time (in the photos here)
- 2.2″ x 8″ AmazingOne spun toroid
- Half Bridge of 60N65 IGBTs (seems to be similar to the 60N60 TO247 IGBTs)
- Coupling = 0.22
- Energy Transfer time = 9.87us
Performance has been pretty good. Originally, the coil used a 0.068uF 940C capacitor but that made my primary frequency about 19% too high and I lost a 60N60 half bridge. Increasing the primary to 8 turns of 14AWG (k=0.26) turned out to be a bad idea and I had a lot of racing sparks. After a few more coats of Polyurethane on the secondary, a return to 6 turns of AWG14 and a larger tank cap, the coil is in tune with a performance I’m very happy with.
This coil currently has a tiny built-in 19VDC laptop power supply for the electronics which uses the famed UCCs from TI as gate drivers to a GDT driving the gates of the IGBTs.
Re: ** Add your Tesla coil here **
Dr. Dark Current, Wed Oct 02 2013, 07:12PM
7KW (SR)SSTC
-fullwave unfiltered, non-interrupted operation ("near-CW"), switchable to half-wave rectification
-16 X 72 cm winding secondary, 0.28 mm wire, 80 kHz resonance
-SKM100GB125DN brick fullbridge
-PLL self tuning driver with exact phase lock (integrator in the loop filter), has no problems with short ground arcs
-400VAC 50Hz input, power factor near 1 (full wave operation)
Here are some photos from Czech Teslathon and a video from my garage. Sadly I have no more media available and the coil got somewhat screwed on the teslathon (occasional pri-sec arcovers after switch on (bad soft start) cooked the primary, slightly overheated secondary and to finish it someone stepped on my toroid), so it is now in non-operational state.
Dr. Dark Current, Wed Oct 02 2013, 07:12PM
7KW (SR)SSTC
-fullwave unfiltered, non-interrupted operation ("near-CW"), switchable to half-wave rectification
-16 X 72 cm winding secondary, 0.28 mm wire, 80 kHz resonance
-SKM100GB125DN brick fullbridge
-PLL self tuning driver with exact phase lock (integrator in the loop filter), has no problems with short ground arcs
-400VAC 50Hz input, power factor near 1 (full wave operation)
Here are some photos from Czech Teslathon and a video from my garage. Sadly I have no more media available and the coil got somewhat screwed on the teslathon (occasional pri-sec arcovers after switch on (bad soft start) cooked the primary, slightly overheated secondary and to finish it someone stepped on my toroid), so it is now in non-operational state.
Re: ** Add your Tesla coil here **
GreenLab, Fri Nov 15 2013, 09:54AM
Hello,
I rebuilt my 2 kVA medium tesla coil.
Now she has a new 3000RPM SRSG, a phaseshifter and a welded 19 " aluminum toroid.
Here are some pictures and a video. :)
greets, GreenLab
GreenLab, Fri Nov 15 2013, 09:54AM
Hello,
I rebuilt my 2 kVA medium tesla coil.
Now she has a new 3000RPM SRSG, a phaseshifter and a welded 19 " aluminum toroid.
Here are some pictures and a video. :)
greets, GreenLab
Re: ** Add your Tesla coil here **
Bumblebee, Sun Nov 17 2013, 11:27PM
This is my small flyback powered tesla coil that I knocked up in my shed. Seems a bit pitiful compared to some of the beasts in this thread, but it is my first attempt and it works!
Spec.
Full-wave rectified flyback with potted strings of fast recovery diodes. Mazilli ZVS driver (modified with 15V zeners, 2uF cap) 25V 10A supply.
Primary of 3/16" copper brakepipe from Halfords, tapped at 13 turns.
3.3 nF tank cap - 2 strings of 20 WIMA FKP1 33nF 2000V dc 700V ac
Spark gap: 5 sections 15mm copper pipe with hairdryer fan sucking air through. 3 x 1.5mm + 1 adjustable gap.
Secondary 920 turns 30 SWG (0.315mm) on 68mm white pvc drainpipe (from B&Q) discs epoxed top and bottom
Topload: 250mm x 67mm toroid (polystyrene wreath former from craft store wrapped with aluminium tape)
RF ground - mains earth with 100nF coupling capacitors to live and neutral to make noise common-mode
http://youtu.be/9GqGMwXYSEo
Bumblebee, Sun Nov 17 2013, 11:27PM
This is my small flyback powered tesla coil that I knocked up in my shed. Seems a bit pitiful compared to some of the beasts in this thread, but it is my first attempt and it works!
Spec.
Full-wave rectified flyback with potted strings of fast recovery diodes. Mazilli ZVS driver (modified with 15V zeners, 2uF cap) 25V 10A supply.
Primary of 3/16" copper brakepipe from Halfords, tapped at 13 turns.
3.3 nF tank cap - 2 strings of 20 WIMA FKP1 33nF 2000V dc 700V ac
Spark gap: 5 sections 15mm copper pipe with hairdryer fan sucking air through. 3 x 1.5mm + 1 adjustable gap.
Secondary 920 turns 30 SWG (0.315mm) on 68mm white pvc drainpipe (from B&Q) discs epoxed top and bottom
Topload: 250mm x 67mm toroid (polystyrene wreath former from craft store wrapped with aluminium tape)
RF ground - mains earth with 100nF coupling capacitors to live and neutral to make noise common-mode
http://youtu.be/9GqGMwXYSEo
Re: ** Add your Tesla coil here **
MrFlatox, Sun Dec 15 2013, 02:26PM
Hi,
This is my first tesla coil, in its ARSG flavour :
specs
-power supply : 2 MOTs in series unfiltered, unrectified with no ballast
-primay tank : MMC based on 942c caps, 7s7p which gives 14kv and 150nF
-primay coil : 14mm copper tubing tapped at 4.75 turns
-rotary spark gap : angle grinder with 8 moving electrodes. break rate is adjustable from 150BPS to 310BPS
-secondary coil : 125mm diameter, 52cm length, 1050 turns of 0.45mm copper wire
-secondary tank : 2 toroids made from aluminium ducting, 125mm tore diameter, 600mm outside diameter.
measured resonance frequency is 165kHz
It draws 16 Amps @240V.
Maximum strike length to a grounded target is 170cm point to point, more than 3 times the secondary winding length.
MrFlatox, Sun Dec 15 2013, 02:26PM
Hi,
This is my first tesla coil, in its ARSG flavour :
specs
-power supply : 2 MOTs in series unfiltered, unrectified with no ballast
-primay tank : MMC based on 942c caps, 7s7p which gives 14kv and 150nF
-primay coil : 14mm copper tubing tapped at 4.75 turns
-rotary spark gap : angle grinder with 8 moving electrodes. break rate is adjustable from 150BPS to 310BPS
-secondary coil : 125mm diameter, 52cm length, 1050 turns of 0.45mm copper wire
-secondary tank : 2 toroids made from aluminium ducting, 125mm tore diameter, 600mm outside diameter.
measured resonance frequency is 165kHz
It draws 16 Amps @240V.
Maximum strike length to a grounded target is 170cm point to point, more than 3 times the secondary winding length.
Re: ** Add your Tesla coil here **
DerStrom8, Mon Jun 30 2014, 05:35PM
Hi folks, just noticed this thread so I thought I'd post my first ever Tesla coil. Technically it's the second, but the first was not very impressive and I scrapped it. You can see it in the background of the videos.
Anyway, affectionately named "Mini Max", this was my first Tesla coil that I considered a success. It's about 300 turns of 28AWG wire around a toilet paper tube. Primary is about 6 turns of solid copper 12AWG house wire, and I am using a single beer bottle capacitor that provides roughly 0.5nF of capacitance. The coil is driven by a 9kv 60mA NST.
Video without topload:
Video with topload (1" steel ball bearing):
The coil stands about 4" tall and the arc is about 3-4" long. It was thrown together with junk I had lying around, so please excuse the crudity of the construction.
DerStrom8, Mon Jun 30 2014, 05:35PM
Hi folks, just noticed this thread so I thought I'd post my first ever Tesla coil. Technically it's the second, but the first was not very impressive and I scrapped it. You can see it in the background of the videos.
Anyway, affectionately named "Mini Max", this was my first Tesla coil that I considered a success. It's about 300 turns of 28AWG wire around a toilet paper tube. Primary is about 6 turns of solid copper 12AWG house wire, and I am using a single beer bottle capacitor that provides roughly 0.5nF of capacitance. The coil is driven by a 9kv 60mA NST.
Video without topload:
Video with topload (1" steel ball bearing):
The coil stands about 4" tall and the arc is about 3-4" long. It was thrown together with junk I had lying around, so please excuse the crudity of the construction.
Re: ** Add your Tesla coil here **
Maurizio Valvo, Fri Aug 15 2014, 12:07PM
Hi, I started this project in 2008 but, due to the scarce time I could dedicate to it, I have not yet finished experimenting and
improving it. However I think it is in a sufficiently good and stable shape now. This is my first and only (up to now ...) Tesla coil.
Main specs:
Full bridge DRSSTC, mainly based on Steve Ward's design (old driver, no phase lead)
Bridge silicon: IXGR60N60C2D1 IGBTs, ISOPLUS247 (similar to TO247 but with isolated tab), 600V, Icm=300A
MMC: series of 5x 0.47uF-2kV WIMA FKP snubber caps, total (measured) 92.9nF-10kV
Secondary: 11x61cm, AWG28, measured 51.5mH
Primary: 7 turns of 6mm copper tube, conic 45 degrees, tapped in the last half turn
Toroid: 50x10cm, aluminium duct
Bus cap: 3200uF-350V (will be replaced soon by 1x or 2x 6800uF-400V)
Bus voltage: rectified 230V mains, i.e. up to about 300Vdc
Primary current peaks at around 110kHz and 127kHz (measured via FFT of scope samples)
Performance (up to now ...): 120cm sparks to grounded rod with OCD limiting to 450A
The secondary coil height relative to the primary coil (i.e. the coupling) can be varied quickly thanks to a particular mounting mechanism (I think this is quite original): the secondary coil form can be moved vertically by turning an M16 threaded nylon rod; to prevent rotation of the coil form I cut three slots at its base, slots in which three corresponding teeth of the primary supporting base wedge (I think this is more clear looking at the drawing below). Also the toroid is mounted on a similar threaded rod to adjust easily its height with respect to the secondary coil.
If anyone wants to replicate this mechanism, I suggest instead to cut the slots in the main base and apply guiding laths onto the coil form; this because cutting the slots in the coil form is quite difficult and the form itself tends to shrink after cutting. Obviously, one can also easily motorize this movement ...
More pictures can be seen here
Credits: I am very grateful expecially to S.Ward, S.Conner, R.Burnett, P.Slawinkski, D.McCauley, T. Fritz, A.C. de Queiroz and many others that shared lots of information through the 4HV forum and also through their individual sites, helping people like me to learn TC theory and develop a successful project.
Maurizio Valvo, Fri Aug 15 2014, 12:07PM
Hi, I started this project in 2008 but, due to the scarce time I could dedicate to it, I have not yet finished experimenting and
improving it. However I think it is in a sufficiently good and stable shape now. This is my first and only (up to now ...) Tesla coil.
Main specs:
Full bridge DRSSTC, mainly based on Steve Ward's design (old driver, no phase lead)
Bridge silicon: IXGR60N60C2D1 IGBTs, ISOPLUS247 (similar to TO247 but with isolated tab), 600V, Icm=300A
MMC: series of 5x 0.47uF-2kV WIMA FKP snubber caps, total (measured) 92.9nF-10kV
Secondary: 11x61cm, AWG28, measured 51.5mH
Primary: 7 turns of 6mm copper tube, conic 45 degrees, tapped in the last half turn
Toroid: 50x10cm, aluminium duct
Bus cap: 3200uF-350V (will be replaced soon by 1x or 2x 6800uF-400V)
Bus voltage: rectified 230V mains, i.e. up to about 300Vdc
Primary current peaks at around 110kHz and 127kHz (measured via FFT of scope samples)
Performance (up to now ...): 120cm sparks to grounded rod with OCD limiting to 450A
The secondary coil height relative to the primary coil (i.e. the coupling) can be varied quickly thanks to a particular mounting mechanism (I think this is quite original): the secondary coil form can be moved vertically by turning an M16 threaded nylon rod; to prevent rotation of the coil form I cut three slots at its base, slots in which three corresponding teeth of the primary supporting base wedge (I think this is more clear looking at the drawing below). Also the toroid is mounted on a similar threaded rod to adjust easily its height with respect to the secondary coil.
If anyone wants to replicate this mechanism, I suggest instead to cut the slots in the main base and apply guiding laths onto the coil form; this because cutting the slots in the coil form is quite difficult and the form itself tends to shrink after cutting. Obviously, one can also easily motorize this movement ...
More pictures can be seen here
Credits: I am very grateful expecially to S.Ward, S.Conner, R.Burnett, P.Slawinkski, D.McCauley, T. Fritz, A.C. de Queiroz and many others that shared lots of information through the 4HV forum and also through their individual sites, helping people like me to learn TC theory and develop a successful project.
Re: ** Add your Tesla coil here **
chris_inkubate, Sun Aug 17 2014, 09:57PM
I have now upgraded all of the electronics, capacitors and toroid on my tesla coil making a big difference in performance:
Full bridge using two Littelfuse MG06400D-BN1MM half bridge bricks
352nF tank made Cornell Dubilier 942Cs
Secondary 150mm x 610mm winding
58cm toroid made with 9cm alu ducting
4700uf 450V bus cap
OCD currently at 800A on UD2.5
Coil now giving 5ft streamers but know this can be optimised more as tuning needs some minor work. I'm limited however by the room size - arcs now hitting walls. I'm also running in an apartment on mains ground so pushing my luck already!
chris_inkubate, Sun Aug 17 2014, 09:57PM
I have now upgraded all of the electronics, capacitors and toroid on my tesla coil making a big difference in performance:
Full bridge using two Littelfuse MG06400D-BN1MM half bridge bricks
352nF tank made Cornell Dubilier 942Cs
Secondary 150mm x 610mm winding
58cm toroid made with 9cm alu ducting
4700uf 450V bus cap
OCD currently at 800A on UD2.5
Coil now giving 5ft streamers but know this can be optimised more as tuning needs some minor work. I'm limited however by the room size - arcs now hitting walls. I'm also running in an apartment on mains ground so pushing my luck already!
Re: ** Add your Tesla coil here **
Teodor Zafiroski, Thu Mar 26 2015, 06:34PM
Here is my hybrid Tesla coil. I call it the RDTC (Relay Driven Tesla Coil). Instead of a spark gap, it uses a relay with NO contacts in self-oscillating mode to act as a spark gap, it runs directly on 230VAC from an european outlet. Here are some images, It gives 8.5cm sparks with 40W in, and 7cm sparks with 25W in. Here are some images:
Here are the build details:
The results were quite good for the overall cost of the project, which was about 35USD...
Teodor Zafiroski, Thu Mar 26 2015, 06:34PM
Here is my hybrid Tesla coil. I call it the RDTC (Relay Driven Tesla Coil). Instead of a spark gap, it uses a relay with NO contacts in self-oscillating mode to act as a spark gap, it runs directly on 230VAC from an european outlet. Here are some images, It gives 8.5cm sparks with 40W in, and 7cm sparks with 25W in. Here are some images:
Here are the build details:
The results were quite good for the overall cost of the project, which was about 35USD...
Re: ** Add your Tesla coil here **
Down with Umbrella, Sat May 16 2015, 02:02PM
Hello fellow coilers, this is my first SGTC.
It is powered by two 15kV/30mA neon sign transformers wired in parallel.
The spark gap has 4 series tungsten electrodes quenched by a Dayton blower.
The secondary has 904 turns of 24awg magnet wire and resonates aprox. 220 kHz
MMC- 2 strings of 18 942c caps giving me .0175uf.
Top load is a 4 x 18 aluminum toroid from amazing1.com
The terry filter is somewhat unique. There were some erratic arcs underneath the PCB boards where the components were soldered, after much trial and error I built a form out of plexiglass and filled it with oil for the TF to sit in. Problem solved.
This coil was quite the project. It took roughly 4 months to build, that includes research and tinkering on and off. I recieved great help from Sigurthr and other forum members.
Next up is a SSTC.
Thanks all for looking!
(Not in photo: two plexiglass covers that cover the caps and the clamp on the lead for the primary tap point)
Down with Umbrella, Sat May 16 2015, 02:02PM
Hello fellow coilers, this is my first SGTC.
It is powered by two 15kV/30mA neon sign transformers wired in parallel.
The spark gap has 4 series tungsten electrodes quenched by a Dayton blower.
The secondary has 904 turns of 24awg magnet wire and resonates aprox. 220 kHz
MMC- 2 strings of 18 942c caps giving me .0175uf.
Top load is a 4 x 18 aluminum toroid from amazing1.com
The terry filter is somewhat unique. There were some erratic arcs underneath the PCB boards where the components were soldered, after much trial and error I built a form out of plexiglass and filled it with oil for the TF to sit in. Problem solved.
This coil was quite the project. It took roughly 4 months to build, that includes research and tinkering on and off. I recieved great help from Sigurthr and other forum members.
Next up is a SSTC.
Thanks all for looking!
(Not in photo: two plexiglass covers that cover the caps and the clamp on the lead for the primary tap point)
Re: ** Add your Tesla coil here **
dillon, Sun May 17 2015, 04:23PM
this is using just a basic zvs driver.but instead of a flyback, it is driving primary directly
dillon, Sun May 17 2015, 04:23PM
this is using just a basic zvs driver.but instead of a flyback, it is driving primary directly
Re: ** Add your Tesla coil here **
Chris Maness, Tue Jul 28 2015, 02:50AM
I have just recently built an OBIT SGTC. It is a beefy OBIT (240VA). I am currently getting 8-10" streamers from my toroid. Here is a video:
I am using 4 brown beer bottles for NaCl+H2O caps.
Here is a pic.
Chris Maness, Tue Jul 28 2015, 02:50AM
I have just recently built an OBIT SGTC. It is a beefy OBIT (240VA). I am currently getting 8-10" streamers from my toroid. Here is a video:
I am using 4 brown beer bottles for NaCl+H2O caps.
Here is a pic.
Re: ** Add your Tesla coil here **
NNO2, Thu Aug 27 2015, 07:56AM
DC Supply Voltage 27V
Resonance Frequency 1.1MHz
FET IRFP260 single
Class E Amplifire
Spider coil but has a two-dimensional spread ,
Since the volume is less it can be stored on a bookshelf .
NNO2, Thu Aug 27 2015, 07:56AM
DC Supply Voltage 27V
Resonance Frequency 1.1MHz
FET IRFP260 single
Class E Amplifire
Spider coil but has a two-dimensional spread ,
Since the volume is less it can be stored on a bookshelf .
Re: ** Add your Tesla coil here **
Anaesthetix, Fri Sept 25 2015, 09:01PM
This is my second spark gap teslacoil, it was built in 2011/12.
Specs are:
HVsupply: 2 MOTs with secondary's in series + voltage doubler (which also serves as capacitive ballast)
Cap: home made rolled capacitor (3* ~75nF in series, measured 25.4nF)
Sparkgap: Asynchronous, operating around 400bps
Primary: 6mm copper tubing, 10 turns
Secondary: 12.5*67cm form, 0,53mm wire ~1200 turns
Toroid: 15*55cm + 8*35 aluminium duct (guessed, can't remember the exact dimensions)
Only have one older vid, tuning wasn't perfect and bad quality cam: https://www.youtube.com/watch?v=BybMIGIzTbo
Imgur album: http://imgur.com/a/RBUgk
Anaesthetix, Fri Sept 25 2015, 09:01PM
This is my second spark gap teslacoil, it was built in 2011/12.
Specs are:
HVsupply: 2 MOTs with secondary's in series + voltage doubler (which also serves as capacitive ballast)
Cap: home made rolled capacitor (3* ~75nF in series, measured 25.4nF)
Sparkgap: Asynchronous, operating around 400bps
Primary: 6mm copper tubing, 10 turns
Secondary: 12.5*67cm form, 0,53mm wire ~1200 turns
Toroid: 15*55cm + 8*35 aluminium duct (guessed, can't remember the exact dimensions)
Only have one older vid, tuning wasn't perfect and bad quality cam: https://www.youtube.com/watch?v=BybMIGIzTbo
Imgur album: http://imgur.com/a/RBUgk
Re: ** Add your Tesla coil here **
Justin, Fri Nov 20 2015, 08:56AM
16" arcs to the wooden shelf
3.5x8.5" Secondary Coil
3"x12" Aluminum Toroid
4 Turn Primary Coil, 12AWG
f0 of around 300KHz
Justin, Fri Nov 20 2015, 08:56AM
16" arcs to the wooden shelf
3.5x8.5" Secondary Coil
3"x12" Aluminum Toroid
4 Turn Primary Coil, 12AWG
f0 of around 300KHz
Re: ** Add your Tesla coil here **
meawoppl, Tue Dec 29 2015, 01:33AM
This is a coil made by the group "Coup De Foudre" titled Orage. Its a wicked beast.
16x96 inch secondary.
Full bridge CM600.
f_0 ~31.8kHz
meawoppl, Tue Dec 29 2015, 01:33AM
This is a coil made by the group "Coup De Foudre" titled Orage. Its a wicked beast.
16x96 inch secondary.
Full bridge CM600.
f_0 ~31.8kHz
Re: ** Add your Tesla coil here **
Verschrottix, Mon Apr 18 2016, 06:39PM
Here's my ARSGTC powered by 4MOTs.
This one is my latest coil.
Currently i'm working on a DRSSTC a bit bigger than the AR'
Verschrottix, Mon Apr 18 2016, 06:39PM
Here's my ARSGTC powered by 4MOTs.
This one is my latest coil.
Currently i'm working on a DRSSTC a bit bigger than the AR'
Re: ** Add your Tesla coil here **
Down with Umbrella, Sat Oct 15 2016, 02:18PM
Hello folks, after successfully completing my SGTC I decided move onto solid state components.
First up is a half bridge with a voltage doubler for approximately 340VDC.
Primarily I used designs provided by Sigurthr, a member here who has faithfully helped me through designing and troubleshooting. His USSTC driver has worked phenomenal as well.
This coil has an output power of well over 1.4kW in CW mode and resonates with the top load capacitor at 222kHz.
MOSFETS: 2x- FDL100N50F mount on 6x6" finned AL hs.
Driver interrupted.
Full power & 25% power with xenon gas bulb.
The quest for a stand alone robust doubler circuit.
Thanks for looking guys!
Down with Umbrella, Sat Oct 15 2016, 02:18PM
Hello folks, after successfully completing my SGTC I decided move onto solid state components.
First up is a half bridge with a voltage doubler for approximately 340VDC.
Primarily I used designs provided by Sigurthr, a member here who has faithfully helped me through designing and troubleshooting. His USSTC driver has worked phenomenal as well.
This coil has an output power of well over 1.4kW in CW mode and resonates with the top load capacitor at 222kHz.
MOSFETS: 2x- FDL100N50F mount on 6x6" finned AL hs.
Driver interrupted.
Full power & 25% power with xenon gas bulb.
The quest for a stand alone robust doubler circuit.
Thanks for looking guys!
Re: ** Add your Tesla coil here **
SpaceWyzard, Wed May 24 2017, 10:34AM
Dual 572b VTTC
My first coil!
Secondary:
2 inch diameter
10 inch height
685 turns off 28awg
Primary:
13 turns of 14awg
C=0.001uF
Grid:
12 turns of 28awg
C=0.0025uF
R=1kohm
Power:
1000w MOT
voltage doubler installed but not engaged in the video (uses knife switch)
Youtube Video
SpaceWyzard, Wed May 24 2017, 10:34AM
Dual 572b VTTC
My first coil!
Secondary:
2 inch diameter
10 inch height
685 turns off 28awg
Primary:
13 turns of 14awg
C=0.001uF
Grid:
12 turns of 28awg
C=0.0025uF
R=1kohm
Power:
1000w MOT
voltage doubler installed but not engaged in the video (uses knife switch)
Youtube Video
Re: ** Add your Tesla coil here **
Vigh holtage, Tue Dec 12 2017, 12:53PM
These are my verry first 2 coils , bolth have a 2in dia secondary 10in long with 28awg wire and bolth have a 6-7 wrap vertical primary of 12awg thhn, one is bipolar with al electrodes and a single spark gap with a 10nf bucket cap and a 12,000v 20ma supply, the other is a standard coil design with a 6in topload and has a 9nf bucket cap and a 12,000v 75ma supply
Vigh holtage, Tue Dec 12 2017, 12:53PM
These are my verry first 2 coils , bolth have a 2in dia secondary 10in long with 28awg wire and bolth have a 6-7 wrap vertical primary of 12awg thhn, one is bipolar with al electrodes and a single spark gap with a 10nf bucket cap and a 12,000v 20ma supply, the other is a standard coil design with a 6in topload and has a 9nf bucket cap and a 12,000v 75ma supply
Re: ** Add your Tesla coil here **
Vigh holtage, Tue Dec 12 2017, 12:57PM
Here they are
Vigh holtage, Tue Dec 12 2017, 12:57PM
Here they are
Re: ** Add your Tesla coil here **
Vigh holtage, Thu Dec 28 2017, 02:28AM
Vigh holtage here , and my coil...
secondary - 2in dia, 28awg wire 10in of wrap
Primary - 8 wraps of 12awg thhn wire
Around pvc coupling vertical
Tank cap - 9 nf wine bottle bucket cap
Power supply - 15kv 120ma nst bank
Spark gap - 4 tungsten electrodes
Vigh holtage, Thu Dec 28 2017, 02:28AM
Vigh holtage here , and my coil...
secondary - 2in dia, 28awg wire 10in of wrap
Primary - 8 wraps of 12awg thhn wire
Around pvc coupling vertical
Tank cap - 9 nf wine bottle bucket cap
Power supply - 15kv 120ma nst bank
Spark gap - 4 tungsten electrodes
Re: ** Add your Tesla coil here **
medved, Mon May 07 2018, 05:39AM
Hi all
my latest big VTTC project with a GU-5B tube with a discharges length of 105cm !
Schematics, construction details, photos etc are on my website:
Specifications:
Vacuum tube: GU-5B 2,5kW triode
Secondary coil: 11x55cm, 524 turns, d=1mm
Primary coil: d=20cm, 28 turns
Feedback coil: 10 turns, HV cable, only impulse mode
Resonant capacitor: 1x 470p/15kV 40kVAr K15U1
f0_secondary: 629kHz
f_primaryLC: 565kHz
f_oscillator: 470kHz
HV source: 4,4kV AC, big 4kVA transformer from radar + voltage doubler = 12,4kVp (no-load)
Length discharges: 105cm
Photos:
Videos:
Human topload with me
medved, Mon May 07 2018, 05:39AM
Hi all
my latest big VTTC project with a GU-5B tube with a discharges length of 105cm !
Schematics, construction details, photos etc are on my website:
Specifications:
Vacuum tube: GU-5B 2,5kW triode
Secondary coil: 11x55cm, 524 turns, d=1mm
Primary coil: d=20cm, 28 turns
Feedback coil: 10 turns, HV cable, only impulse mode
Resonant capacitor: 1x 470p/15kV 40kVAr K15U1
f0_secondary: 629kHz
f_primaryLC: 565kHz
f_oscillator: 470kHz
HV source: 4,4kV AC, big 4kVA transformer from radar + voltage doubler = 12,4kVp (no-load)
Length discharges: 105cm
Photos:
Videos:
Human topload with me
Re: ** Add your Tesla coil here **
medved, Mon May 07 2018, 06:46AM
...and next big VTTC 2MHz project with a GU-5B tube with a discharges length of 70cm !
Schematics, construction details, photos etc are on my website:
Specifications:
Vacuum tube: GU-5B 2,5kW triode
Secondary coil: 7,5x37,5cm, 154 turns, S=1,5mm2
Primary coil: d=12,5cm, 7 turns
Feedback coil: 3 turns, HV cable, only impulse mode
Resonant capacitor: 1x 470p/15kV 40kVAr K15U1
f_oscillator: 2MHz
HV source: 4,4kV AC, big 4kVA transformer from radar + voltage doubler = 12,4kVp (no-load)
Length discharges: 70cm
Photos:
Videos:
Human topload with me
medved, Mon May 07 2018, 06:46AM
...and next big VTTC 2MHz project with a GU-5B tube with a discharges length of 70cm !
Schematics, construction details, photos etc are on my website:
Specifications:
Vacuum tube: GU-5B 2,5kW triode
Secondary coil: 7,5x37,5cm, 154 turns, S=1,5mm2
Primary coil: d=12,5cm, 7 turns
Feedback coil: 3 turns, HV cable, only impulse mode
Resonant capacitor: 1x 470p/15kV 40kVAr K15U1
f_oscillator: 2MHz
HV source: 4,4kV AC, big 4kVA transformer from radar + voltage doubler = 12,4kVp (no-load)
Length discharges: 70cm
Photos:
Videos:
Human topload with me
Re: ** Add your Tesla coil here **
Wolfsangel1, Sat Sept 01 2018, 08:51AM
ISSTC
Primary - 8 turns.
Secondary 8 cm *10 cm, 0.15 mm wire. Full bridge on gdt and K50H603. Current transformer on bottom of the secondary.
Sparks about 25 cm.
Wolfsangel1, Sat Sept 01 2018, 08:51AM
ISSTC
Primary - 8 turns.
Secondary 8 cm *10 cm, 0.15 mm wire. Full bridge on gdt and K50H603. Current transformer on bottom of the secondary.
Sparks about 25 cm.
Re: ** Add your Tesla coil here **
MRMILSTAR, Wed Sept 12 2018, 03:44AM
* Completed January 2018
* Totally self-contained for portability
* Single 833A
* Single MOT
* Separate variacs for plate voltage and filament voltage
* Power factor correction
* EMI filter
* 20" streamers with interruptor
Operational picture is with ion motor attached to discharge electrode running in CW mode.
MRMILSTAR, Wed Sept 12 2018, 03:44AM
* Completed January 2018
* Totally self-contained for portability
* Single 833A
* Single MOT
* Separate variacs for plate voltage and filament voltage
* Power factor correction
* EMI filter
* 20" streamers with interruptor
Operational picture is with ion motor attached to discharge electrode running in CW mode.
Re: ** Add your Tesla coil here **
medved, Mon Jan 07 2019, 06:20PM
Hello everyone !
I'm here again with my next tesla coil, this time it's DRSSTC
Schematics, construction details, photos etc are on my website:
Specifications:
IGBT full-bridge HGTG30N60A4D
325Vbus
40-60us
max. 400BPS
OCD: 390Apk
Length discharges: 100-110cm
Secondary Coil: 11x30cm; 1091turns; 0,25mm
f: 166kHz
medved, Mon Jan 07 2019, 06:20PM
Hello everyone !
I'm here again with my next tesla coil, this time it's DRSSTC
Schematics, construction details, photos etc are on my website:
Specifications:
IGBT full-bridge HGTG30N60A4D
325Vbus
40-60us
max. 400BPS
OCD: 390Apk
Length discharges: 100-110cm
Secondary Coil: 11x30cm; 1091turns; 0,25mm
f: 166kHz
Re: ** Add your Tesla coil here **
kaboooom2000uk, Tue May 26 2020, 03:58PM
Hi all, its been a while since I frequented the site, just wanted to share my work on a VTTC which continues to evolve with each day of isolation. Its by no means finished but it keeps me occupied.
It is based largely on the work of Steve Wards schematics, and advice from others I have made a working coil.
It's truly my first real experience with a VTTC, and was surprised at how forgiving they are. It wasn't long before I assembled a prototype on my bench and had it producing some sparks. Please excuse the crudity of the design as I am convinced it is far from optimal. Hopefully it is interesting.
Tube is a TY4-400 - capable of about 350W dissipation but earlier tests used an 812A which is a nice step up.
Transformer is a pair of railway transformers, at 1KW each, with 650V and 120V windings, I have hooked up the 650V windings in series to get about 1400V at 1KVA at full power into the multiplier.
Each of the 120V windings are in series and allow me to drive the pair via a 240V 8A variac. I made a crude interrupter based on an SCR and external signal generator which as you can see is not synchronised at all, but produces some interesting beat frequencies. I am trying to find a more elegant solution for this.
I am using Russian ceramic doorknob capacitors for my tank circuit and the secondary coil has a resonant frequency of about 750Khz with a topload, and about 1.4Mhz without, i estimate its about 900 turns of 0.25mm wire on a 50mm tube, I tend not to be too precise with the secondary as what seems to be important is determining the frequency and then working back to design the primary components.
Here I test the coil in CW mode with some large 220UF 2500V capacitors on a full wave doubler to get over the transformers low voltage. The result is a very quiet power arc, and due to the energy storage the oscillation continues long after the variac is set to 0V.
I suppose my goal would be to make a coil which operates in pulsed mode and can dump that large amount of energy in the capacitors into the primary, I am think maybe a hydrogen thyratron or something in place of the SCR to handle the peak current and voltages. Anyway hope you found this interesting.
kaboooom2000uk, Tue May 26 2020, 03:58PM
Hi all, its been a while since I frequented the site, just wanted to share my work on a VTTC which continues to evolve with each day of isolation. Its by no means finished but it keeps me occupied.
It is based largely on the work of Steve Wards schematics, and advice from others I have made a working coil.
It's truly my first real experience with a VTTC, and was surprised at how forgiving they are. It wasn't long before I assembled a prototype on my bench and had it producing some sparks. Please excuse the crudity of the design as I am convinced it is far from optimal. Hopefully it is interesting.
Tube is a TY4-400 - capable of about 350W dissipation but earlier tests used an 812A which is a nice step up.
Transformer is a pair of railway transformers, at 1KW each, with 650V and 120V windings, I have hooked up the 650V windings in series to get about 1400V at 1KVA at full power into the multiplier.
Each of the 120V windings are in series and allow me to drive the pair via a 240V 8A variac. I made a crude interrupter based on an SCR and external signal generator which as you can see is not synchronised at all, but produces some interesting beat frequencies. I am trying to find a more elegant solution for this.
I am using Russian ceramic doorknob capacitors for my tank circuit and the secondary coil has a resonant frequency of about 750Khz with a topload, and about 1.4Mhz without, i estimate its about 900 turns of 0.25mm wire on a 50mm tube, I tend not to be too precise with the secondary as what seems to be important is determining the frequency and then working back to design the primary components.
Here I test the coil in CW mode with some large 220UF 2500V capacitors on a full wave doubler to get over the transformers low voltage. The result is a very quiet power arc, and due to the energy storage the oscillation continues long after the variac is set to 0V.
I suppose my goal would be to make a coil which operates in pulsed mode and can dump that large amount of energy in the capacitors into the primary, I am think maybe a hydrogen thyratron or something in place of the SCR to handle the peak current and voltages. Anyway hope you found this interesting.
Re: ** Add your Tesla coil here **
klugesmith, Mon Jun 08 2020, 05:38PM
Welcome back. A sign of life in old 4hv forum.
klugesmith, Mon Jun 08 2020, 05:38PM
Welcome back. A sign of life in old 4hv forum.
Re: ** Add your Tesla coil here **
nzoomed, Fri Dec 16 2022, 01:21AM
Just realised my coil is not posted here, I thought I had added it at the time I built it!
I need to grab out my notes on the specs again, but its loosley the same as what I posted on my thread at the time.
roughly 1200m of 32AWG wire on a 6 inch PVC pipe. Uses 2xCM300 IGBTS and I think from memory its about 700APK.
I could have upgraded the MMC and pushed this thing more I think, but I easily get 2m + long streamers off this thing.
Stands 1260 high, toroid is 680 wide by 150mm diameter ducting.
nzoomed, Fri Dec 16 2022, 01:21AM
Just realised my coil is not posted here, I thought I had added it at the time I built it!
I need to grab out my notes on the specs again, but its loosley the same as what I posted on my thread at the time.
roughly 1200m of 32AWG wire on a 6 inch PVC pipe. Uses 2xCM300 IGBTS and I think from memory its about 700APK.
I could have upgraded the MMC and pushed this thing more I think, but I easily get 2m + long streamers off this thing.
Stands 1260 high, toroid is 680 wide by 150mm diameter ducting.
Re: ** Add your Tesla coil here **
nzoomed, Fri Dec 16 2022, 01:24AM
Just realised I never added my coil here!
Dont have the exact specs on hand because its been so long, but runs at about 700APK and could be beefed up more if i upgraded the MMC.
Stands 1260 high, 680 wide toroid 150mm diameter ducting.
about 1200mm 32 AWG wire on a 6 inch PVC pipe.
nzoomed, Fri Dec 16 2022, 01:24AM
Just realised I never added my coil here!
Dont have the exact specs on hand because its been so long, but runs at about 700APK and could be beefed up more if i upgraded the MMC.
Stands 1260 high, 680 wide toroid 150mm diameter ducting.
about 1200mm 32 AWG wire on a 6 inch PVC pipe.
Re: ** Add your Tesla coil here **
nzoomed, Fri Dec 16 2022, 01:24AM
sorry these posts have duplicated and my attachment has not uploaded.
nzoomed, Fri Dec 16 2022, 01:24AM
sorry these posts have duplicated and my attachment has not uploaded.
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