RE: Fwd: [jlnlabs] TESLA COIL REVISED

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

Original poster: "John H. Couture" <couturejh-at-mgte-dot-com> 


Ed, Dan -

This is a typical unsolved (?) Tesla coil problem. Which ratio, Cp/Cs or
Ls/Lp do you use to find  the true spark (gain) when the input wattage is
the same? The other effective spark length parameter in the TC is the
overall efficiency. What capacitive or inductive ratios give the best
overall efficiencies? This would depend on the complex wave currents which
are different for a capacitive load compared to a inductive load. The
question is which ratio gives the best efficiency the optimum capacitive
ratio or the optimum inductive ratio? It is relatively easy to adjust either
ratio for a tuned system. To my knowledge this type of question has never
been answered for Tesla coils.

    John Couture

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


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Saturday, January 03, 2004 10:12 PM
To: tesla-at-pupman-dot-com
Subject: Re: Fwd: [jlnlabs] TESLA COIL REVISED6


Original poster: Ed Phillips <evp-at-pacbell-dot-net>

"By reducing the number of turns in your secondary, you are reducing the
inductance.  Maintaining a constant primary side of your coil, you will
need
to increase
the topload of your secondary to maintain resonance.  Now since GAIN =
SQRT
(C1/C2) it is fairly obvious that by increasing C2 you are decreasing
the
maximum
theoretical gain of your secondary.

Dan"

	Note that, if both primary and secondary are in tune, the secondary to
primary inductance ratio can be used instead.  However, since the energy
in the secondary was stored in the primary CAPACITOR before the gap
fired, I prefer to think in terms of the capacitance ratio.

Ed