RE: Resonance - what is it? and OLTC stuff

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Jonathon -

I reread my post below and realized that the barn door cap is a neat
demostration of voltage rise but it is not a demonstration for resonance.
Resonance has to do with RCL circuits and frequencies and a different
equation. The equation is
        Fr = 1/(2pi sqrt(LC))
With a series circuit and at resonance the current is maximum and the rise
in voltage occurs across the C or L. With a parallel circuit and at
resonance the impedance is a maximum and the voltage rise occurs across the
C and L.

The Q factor of the coil is a ratio of  2piFr/R  and is an indicator of how
high the voltage may rise. The voltage will be higher if the coil inductance
is higher or the resistance is lower.

John Couture

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-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, August 21, 2002 4:32 PM
To: tesla-at-pupman-dot-com
Subject: RE: Resonance - what is it? and OLTC stuff


Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>

Jonathon -

Resonant rise can be demonstraded in several ways. The one I like is to make
a simple barn door capacitor with a small spark gap. Charge the cap when it
is closed. When you open the cap the voltage will rise and there will be a
spark across the gap. In other words with a fixed quantity of electricity
(Q) the voltage (V) and capacity (C) are related by
      Q = CV    It is obvious that if you reduce C (open the cap) the
voltage will have to rise with a fixed quantity of electricity. A large high
voltage transmitter capacitor can also be used.

This is a good classroom demostration.

John Couture

------------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, August 18, 2002 10:09 PM
To: tesla-at-pupman-dot-com
Subject: Resonance - what is it? and OLTC stuff


Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Kidd6488-at-aol-dot-com>

Hi everyone,

I've been familiar with Tesla Coils for about 2 years now, but I realized
that I really don't know what resonance, and resonant rise actually are. I
kinda understand how the voltage rises and such, but not fully. Someone care
to enlighten me?

----------------------  snip

Good luck everyone,

---------------------------------------
Jonathon Reinhart
hot-streamer-dot-com/jonathon