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Florian

Fri Nov 28 2008, 07:55PM

Registered Member #1827 Joined: Fri Nov 28 2008, 07:05PM
Location: Austria
Posts: 6

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

gangster

Mon Dec 29 2008, 11:56PM

Registered Member #1831 Joined: Sun Nov 30 2008, 03:09PM
Location:
Posts: 19

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

Mads Barnkob

Sat Jan 24 2009, 11:38AM

Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968

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:

Sonic

Sat Jan 24 2009, 11:03PM

Registered Member #1932 Joined: Sat Jan 24 2009, 10:50PM
Location: The Netherlands
Posts: 1

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:
3222947047 3a3ac6390a

Static gap 2:
3242662042 69cb991b18

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:
3494374091 364670e1bf

I am very curious about whether this will bring bigger sparks. I'll update this post once I have been able to test it.

Duality

Sun Feb 01 2009, 03:04PM

Registered Member #1951 Joined: Sun Feb 01 2009, 01:59PM
Location:
Posts: 105

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 ;)

MRacerxdl

Sun Mar 01 2009, 11:45PM

Registered Member #989 Joined: Sat Sept 08 2007, 02:15AM
Location: SÃ£o Paulo, Brazil
Posts: 476

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:

kilovolt

Sat Mar 14 2009, 08:11PM

Registered Member #2018 Joined: Tue Mar 10 2009, 09:56AM
Location: Switzerland
Posts: 74

My VTTC, built about one year ago. The tube is a Russian GU81M Pentode.

Vttc

Power transformers are 2 pcs 10kV potential transformers, limited to about 3.5kV AC. No level shifter used.

Regards kilovolt

Alexandre

Mon Mar 16 2009, 05:42PM

Registered Member #1228 Joined: Tue Jan 15 2008, 01:08AM
Location: Curitiba, Brazil
Posts: 162

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 6Âº 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

ElectricalEngg.

Wed Apr 29 2009, 06:32PM

Registered Member #1946 Joined: Sat Jan 31 2009, 11:37AM
Location: India
Posts: 43

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

jeffomatic

Sun May 03 2009, 07:46AM

Registered Member #2106 Joined: Sun May 03 2009, 07:26AM
Location: Utah
Posts: 4

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.

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