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Re: dual MOT Tesla coil design is complete (fwd)



Original poster: "resonance" <resonance@xxxxxxxxxxxx>




Terry's SISG IGBT design makes it possible. Very high efficiency and no 30% typical spark gap losses means the higher power is going into the primary mag field and ends up in the sec where it belongs.

If I can hit 6.5 to 7 feet with this light weight design I will be very happy. A pair would produce 13-15 feet between two 7 ft tall towers ---
very powerful and reasonably portable, fast to set up, etc.

Brian Vodvarka, a local Elec. Engr., may be the first experimenter to test my design. I volunteered to lend him my two MOTS, MMCs, wound sec coil, and toroid toploads (used 20 x 5 and an 30 x 8") on this coil. Getting too cold here --- I gotta' cut out for Tucson later next week!!

Brian is going to use him PSpice experience and knowledge to model it all so we have some good answers in a few weeks.

Dr. Resonance



At 10:48 PM 10/30/2006, you wrote:
Hi DC,

From what you say below, it sounds like you have the design but have not built it yet?? If this is true, where did the 7.5 foot arcs come from??

Gerry R.

My SISG does about 28 inch arcs at 4800 SISG firing volts with a 165nF primary cap. It would do about 42 inches if I let it loose with one MOT... If DC can get 4800 Watts out of two MOTs, then the spark length directly doubles to 84 inches or 7 feet. But he is using a bit larger primary cap too... So 7.54 feet is about right. I am a little concerned about getting 4800 Watts out of just two MOTs. But DC might know tricks I have never dreamed of ;-))

I have not thought much about the dual MOT SISG system... But others are now thinking far faster than me on SISG things ;-)))))

Cheers,

        Terry