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LAN_403

medved

Thu Jan 19 2012, 07:50PM

Registered Member #4338 Joined: Sun Jan 15 2012, 10:19AM
Location: Slovakia
Posts: 21

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

Mon Feb 20 2012, 11:51PM

Registered Member #4338 Joined: Sun Jan 15 2012, 10:19AM
Location: Slovakia
Posts: 21

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

DSCF8351

Extreme Electronics

Mon Apr 09 2012, 08:08AM

Registered Member #74 Joined: Thu Feb 09 2006, 09:17AM
Location: Nottingham UK
Posts: 99

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

TeslaJunky

Thu Apr 12 2012, 09:24PM

Registered Member #3037 Joined: Mon Jul 26 2010, 06:42PM
Location: Los Angeles
Posts: 20

MONSTER Coil in my Driveway:

Unbelievable output.

Specs are in the video:

RateReducer

Thu Apr 26 2012, 07:47PM

Registered Member #4603 Joined: Wed Apr 25 2012, 07:33PM
Location: Austria
Posts: 159

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

Dr. Dark Current

Fri May 18 2012, 03:47PM

Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384

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:

Neet Studio

Wed May 23 2012, 08:31PM

Registered Member #4037 Joined: Fri Jul 29 2011, 03:13PM
Location:
Posts: 86

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. :(

GreenLab

Sat Jun 23 2012, 10:28AM

Registered Member #3047 Joined: Thu Jul 29 2010, 10:56PM
Location: Germany
Posts: 12

This SRSGTC I had built with a friend ("Teslatool" germany).

This is the first successful run with synchronus spark gap @ 200 bps.

Secondary:
â€¢ Diameter = 160 mm
â€¢ Turns = 840
â€¢ Toroid = 210 mm * 800 mm
â€¢ Resonantfrequenzy = 160 kHz

Primary:
â€¢ 10 mm coppertube
â€¢ 7 windings

200 BPS RSG:
â€¢ The motor is a 200W / 3000 rpm synchronus motor (doublegrinder which I have cut two flats).

HV source:
â€¢ Two PT`s 11,5 kV / 4,6 kVA (on video) with adjustable ballast. Operation with 6,9 kVA and more possible.

Tank Cap:
â€¢ Wima FKP-1 MMC / Â±100 nF

Greets, GreenLab

geobruce

Mon Sept 17 2012, 03:53PM

Registered Member #6729 Joined: Sun Sept 16 2012, 10:36AM
Location: Belgium Antwerp (Berchem)
Posts: 1

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:
-

Physics Junkie

Tue Nov 13 2012, 07:52PM

Registered Member #7267 Joined: Tue Oct 16 2012, 12:16AM
Location: Detroit, Michigan
Posts: 407

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