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