# Re: Tank cap and psu for 3 inch coil

```Original poster: "Hydrogen18" <hydrogen18-at-hydrogen18-dot-com>

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
> 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
>  >
>  >
>  >
>  >

```