Re: [TCML] Spark gap Resistance

["David N. Van Doren" <DNVanDoren@xxxxxxxxxxx>]

I believe it's the ratio of XL to R. The discharge current of C1 is limited 
by XL+R. XL is the useful part and R is thrown away. So the smaller R is to 
XL the less gets wasted. In addition to that there is an R-L decay going on 
that defines the time it takes the current to decay. So one needs to get the 
energy transferred before the end of this decay cycle and the smaller 
percentage of that time the less wasted energy. The Higher the ratio of XL 
to R the longer the ringdown time and more time to transfer energy hence the 
need for lower k's.
Low ratio XL to R, as in High current designs need higher confident of 
couplings to transfer the energy before R-L decay takes to much away. (I 
think?)
It's a F*****g Balancing act.
A Tesla Coil has too many knobs to turn simultaneously. It seems to help me 
to reduce the circuit to as simple as possible for study, just 6 components 
and a k,    L1, C1, R1 "k" L2, C2 and R2. C2 is fixed by the charging supply 
(one less knob). If we could settle on a spark gap R, that would be another 
knob fixed. --- That would be down to 4 knobs and a "k". Now if we could fix 
R2 (streamer R) then we would have just 3 three knobs and a "k" left to 
twiddle with. How difficult can it be? (=^P)
Dave
----- Original Message ----- 
From: "David N. Van Doren" <DNVanDoren@xxxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, November 19, 2007 10:43 AM
Subject: [TCML] Spark gap Resistance


Does anyone have any data on spark gap resistance?
and for that matter Streamer impedance?
I've been doing some simulations, and for the lack of any better number I've 
been using 4 ohms for spark gap R's and have tried using 220kohm+1.5pf'/ft 
for streamers, but doesn't always seem to look right in the sims. Trying to 
characterize plasma is always difficult at best.

Thanks

Dave
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