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