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

["Tesla list" <tesla@xxxxxxxxxx>]

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