Re: Fwd: [jlnlabs] TESLA COIL REVISED

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


It requires quite a bit of work and accurate measurement to determine the
secondary system capacitance, so, in most cases, it's easy to determine gain
by using the inductance ratios which can easily be measured for both primary
and secondary coils with modern hand-held multimeters.

On larger coils the ion field created continues to grow with time so the
effective field capacitance is constantly changing, usually growing until
some point when small air drafts are removing the ions from the area as fast
as the ions are gathering.

Comparing results to both Terry's planar antenna system and single shot
pulsed DC operation with spark gap measurement for output, there is a very
small error, usually 2-3% or less.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, January 05, 2004 6:15 PM
Subject: RE: Fwd: [jlnlabs] TESLA COIL REVISED


 > 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
 >
 >
 >