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Re: More on Z=SQRT(L/C)




Approx 25-35 Ohms average.

Dr. Resonance


-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Tuesday, December 14, 1999 5:06 PM
Subject: More on Z=SQRT(L/C)


>Original Poster: Kennan C Herrick <kcha1-at-juno-dot-com> 
>
>More beating on the (not quite dead) horse:  I'm still troubled by the
>referenced expression.  That's an expression for the >characteristic
>impedance< of certain electrical networks.  It doesn't seem to me that
>that has a lot to do with the resonant network of a Tesla coil. 
>Characteristic impedance, in ohms, is generally defined as the impedance
>of a transmission line of infinite length; or else, the value of a
>network's load resistance that causes the impedance looking into that
>network to be the same as that load resistance.  Who knows what a load
>"resistance" might be for a Tesla coil?
>
>Malcolm Watts wrote that, for the lossless case at resonance, Z = Xl =
>Xc...but shouldn't that be, Z = Xl - Xc?  Whether at resonance or no,
>doesn't Z always = the vector sum of Xl and Xc (absent loss), that sum
>being zero at resonance?
>
>...And does it matter a whole heck of a lot when most of you guys (&
>girls, I've noted) are clobbering your secondaries with all kinds of
>messy shock-excitations from your 19th-cy.-style apparatuses?  (Speaking
>as a solid-state-er, myself...ahem...)
>
>Ken Herrick
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