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RE: [TCML] confused

I think that JavaTC estimates the spark length of a coil only by the power consumed by the transformer, so it would give the same answer for both a 15/30 and 7.5/60 NST.  It is believed that higher voltages may actually result in greater theoretical efficiency for the same power level, due to lower losses in the spark gap, but I don't know that this has ever been experimentally confirmed, as it's impossible to make two coils where the only difference is the NST.  Too many other necessary differences would make it difficult to reach a conclusion.

Regards, Gary Lau

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of douglas smith
> Sent: Wednesday, June 18, 2008 12:54 PM
> To: tesla@xxxxxxxxxx
> Subject: [TCML] confused
> all this talk about hooking  ac transformers in series has got me really confused.
> i always thought  that you could connect DC output transformers in series
> but not AC.
> i know that there is some kind of circuit that allows you to do so but just
> putting two nst's in series sounds like trouble to me.
> why would you want to anyway?
> in designing some 15 different possible coils with javatc it seems to me that
> a higher voltage is not always that necessary.
> example: i would get the same spark length and power factor with using a
> 15000 v @ 30 ma as i would with a 7500 v @ 60 ma
> of course I'm no expert the math just seems the same (P=I x E) and also with javatc
> I'm sure that there is a limit on how low you can go with the voltage vs. current
> but it does seem to me that the major rule of thumb is the power factor.

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