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Re: Terry's Little SISG Research Coil

Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>

I was hopeful, but, unfortunately, this does not scale up very good.

Our model M-50 coil which puts out a 56 inch long spark, using your value of 139,000 volts / 7 inches at 120 pps, would be developing 56 inch x (139,000 v / 7 inch) which equals 56 inch x 19.857 kV / inch at 120 pps = 1.1 megaVolts!

I would estimate based on the 70% x Vpri x SQR (Ls/Lp) the real output is around 220 kV and not 1,100 kV.

A large differential.

Dr. Resonance

At 120 BPS it is 7 inches.
240 BPS is 10 inches.
360 BPS is 11 inches.

With the two MOT system I was getting almost exactly 6 inches per 900V step in firing voltage. ie. 6, 12, 18, 24, 30 inches. So once the voltage breaks away from the toroid proximity, the distance seems to be proportional to firing voltage.