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Re: [TCML] 5" Sparks - Approx 35 watts input power: Tesla was correct!
In a message dated 3/12/2008 10:48:03 P.M. US Eastern Standard Time,
>John & Bart:
>With parallel copper tube spark gaps, and 30-60 mA drive I usually obtain
>1.27 Freau factor. With hyperbaric gaps, much more efficient quenching, I
>use 1.55 Freau factor. I can never seem to hit the 1.7 but as I recall John
>was using a 42 inch sec coil when making this measurement.
I usually used a 23" or 24" tall secondary of 4.2 or 6.5" diameter. For my
1.7 tests. But I was using an SRSG. Using a static gap I got 10% shorter
This would reduce the figure to about 1.5.
>The Esec = -L x dI/dt factor seems to become very important as the L is very
>large with a large diameter inductor. Also, the hyperbaric gap will reduce
>the dI/dt factor, and of course increase quenching, which allows a lower
>number of notches to achieve good quench, especially in a small system.
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