Re: NST/capacitor resonance question
Tesla List wrote:
> Original Poster: Adam <psycho-at-tradewind-dot-net>
> I'm still new at this, so someone please correct me if my logic is
> I determine the optimum capacitance of the tank capacitor by matching
> capacitive reactance (impedence), with the NSTs reactance (impedence),
> which is assumed to be inductive. The reactance equations are done with
> frequency=60Hz (line frequency), so when this part of the circuit is
> active, the only impedence is resistive, and much more power gets
> This seems great, but what about the normal resistive qualities of the
> NST? The NST is made up of a LOT of thin wire, right? I would think
> this yields a rather high resistive impedence. Wouldn't this be
> inconsistent with the assumption that all the NST's impedence is due
> induction? Or is the resistance so small that it has very little effect
> on the NST's total impedence?
For a 12000 volt, 60 ma 60 Hz transformer such as I use here the
nominal leakage impedance is 200000 ohms (12000/0.06), while the total
DC resistance is of the order of 5000 ohms. Bottom line is that it DOES
have a small effect on the total impedance.
>I believe the latter to be true for the
> self-capacitance of the transformer, but I've never really looked at an
> NST core, so I have a very barebones understanding of what's in there.
> Nothing is ever simple, and that's why I love this