Re: DC Tesla Coil

From: 	Alfred C. Erpel[SMTP:aerpel-at-op-dot-net]
Sent: 	Sunday, January 04, 1998 6:40 PM
To: 	Tesla List
Subject: 	Re: DC Tesla Coil

Greg and all

GL> The reactive power in any tank circuit is given by Ec x Fres,
GL> and the circuit will resonate only at that reactive power level.
GL> Ec will _always_ equal El at resonance by definition, regardless
GL> of the component values or frequency.

    I'm lost because I don't know what EC and Fres above mean.

AE>> If so, then to resonate at 100,000 hz would require a capacitor of
AE>> .000001591 F and a primary of .000001591 H. This primary inductance
AE>> does not appear to be practical in a tesla coil.

GL>You are assuming that 1 ohm is the optimum surge impedance
GL>for the tank circuit here.  In reality, Zsurge should be
GL>about 30 to 50 times higher than the Rgap, in order to
GL>obtain good performance.

    I don't know enough to assume too much, just barely enough to know that
I don't know a lot.<smile> What do you mean by surge impedance and why
should it be 30 to 50 times the gap resistance?

Alfred Erpel