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Tesladownunder

Mon Mar 27 2006, 12:44AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

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, 12:45AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

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, 12:46AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

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, 12:48AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

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, 12:49AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

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, 12:52AM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

colin99 June 26 2005

Tesladownunder

Tue Mar 28 2006, 05:11PM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

Connor McSteve June 27 2005

"MjÃ¶llnir" 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, 05:13PM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

Reaching June 29 2005

MHRDRSSTC2

Specs:

Halfbridge with irfp460Â´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, 05:15PM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

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, 05:16PM

Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424

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.

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