Re: Real data from real experiments.

• To: tesla-at-pupman-dot-com
• Subject: Re: Real data from real experiments.
• From: Richard Hull <hullr-at-whitlock-dot-com>
• Date: Mon, 11 Nov 1996 16:11:05 -0800

Tesla List wrote:
> 
> >From MALCOLM-at-directorate.wnp.ac.nzSun Nov 10 21:43:05 1996
> Date: Mon, 11 Nov 1996 10:51:14 +1200
> From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
> To: tesla-at-pupman-dot-com
> Subject: Re: Real data from real experiments.
> 
> Brent,
>        There is an even better reason to use high Vcap, low-C in a
> primary....
> 
> <masssive snip>
> > No charge is actually 'lost' - rather, it is simply re-distributed.
> > The total stored potential energy is reduced though, according to the
> > square of the voltage. Seems to me that this is exactly the reason why
> > we use small value capacitors with a heaping amount of very high voltage
> > in the primary circuit!
> 
> Example : let bang size = E, cap = C, primary = L. Surge impedance =
> SQRT(L/C), peak current inversely proportional to surge impedance
> and gap loss proportional to Ipk.
> 
> Let's double our surge impedance by halving C and doubling L (same
> frequency) and keep bang size up by increasing voltage to compensate
> for a drop in C.
> We now have Z surge = 2x original, V = SQRT2 x original voltage (keep
> E constant) giving current decreased by SQRT2, gap losses therefore
> reduced by SQRT2.
>     Okay, this all needs the appropriate calculus done to truly
> quantify peak values etc. but I think you can see the benefit
> attainable.
> 
> Think I got that all right but stand to be corrected as usual,
> Malcolm


Malcolm,

I have long known and harped that the high L low C coil outperformed 
other systems with the reverse set of parameters, but your explaination 
is quite good and insightful.

Richard Hull, TCBOR

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