Re: Tank cap and psu for 3 inch coil

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

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


Since you are not firing at each peak you can use 1.6 x Cres.

If running a NST you absolutely do not want to run at Cres as this can
easily resonant and overvolt the xmfr windings especially with RF.

The xmfrs work fine at 1.6 x Cres and provide a longer spark output than
just running at Cres.

Yes, 50-55 nF will work well.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
 >
 > Ok, so I take the 34.5 nF and multiply it times 1.6 for 55.2 nF? Or do I
 > have something wrong? Also, why wouldnt I want my transformer working
 > harder, wouldnt it give better performance?
 >
 > ---Eric
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Monday, April 12, 2004 11:53 AM
 > Subject: Re: Tank cap and psu for 3 inch coil
 >
 >
 >  > Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
 >  >
 >  >
 >  > This would give you a resonant match which could be hard on the xmfr
under
 >  > some conditions.  It's better to calculate resonant match as you did,
and
 >  > then use the equation:
 >  >
 >  > C = 1.6 * Cres
 >  >
 >  > This will give you a slightly larger value and works good because there
 > will
 >  > not be a large resonant rise because the xmfr and cap.
 >  >
 >  > If running a synchro gap, then use C = 3.2 * Cres
 >  >
 >  > At this power level you would use two static gaps in series with a max
 >  > setting (total of both) at or less than 0.160 - 0.180 inches.
 >  >
 >  > Dr. Resonance
 >  >
 >  > Resonance Research Corporation
 >  > E11870 Shadylane Rd.
 >  > Baraboo   WI   53913
 >  >  >
 >  >  > Assuming a 10 kilavolts AC 60 hz power supply at 130ma according to
 >  >  > wintesla I should have a 34.5 nF cap for 3 inch coil? Is this right,
 > this
 >  >  > is my first coil and I'm a little in the dark. This power supply is
my
 > 4
 >  >  > pack of MOTs ballast at 60 microfarads with 240 VAC in.
 >  >  >
 >  >  > ( 1 )/( 2pi*60*60*(10^(-6)) ) = 44.2097 ohms
 >  >  >
 >  >  > 240 / 44.2097 = 5.42867 amps
 >  >  >
 >  >  > 240 * 5.42867 = 1302.88 watts
 >  >  >
 >  >  > is 1300 watts enough for a 3 inch coil or should I go with a bigger
cap
 >  > and
 >  >  > try and push more power in? Also wintesla says I should set a single
 >  > static
 >  >  > gap to 1.1905 inches? I dont see 10 kilavolts jumping that far.
 >  >  >
 >  >  > ---Eric
 >  >  >
 >  >  >
 >  >  >
 >  >  >
 >
 >
 >