Re: big cap

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

Original poster: "Rick W by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rickwilliams404-at-earthlink-dot-net>

Hi Godfrey,

Yeah, calculating series capacitance will give that value.

But let's say a coil resonates at 200Khz just for an example.

Calculating for reactance...

.1uF at 200Khz = 7.96 ohms
2uf at 200Khz = .4 ohms

So 66% of the total voltage could be seen across the smaller cap. I think
those Geek caps are rated somewhere around 2Kv or 2.5Kv.


----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 28, 2001 2:26 PM
Subject: big cap


> Original poster: "Loudner, Godfrey by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>
>
> Hi All
>
> I have a 2uF / 63kV cap from an impulse x-ray machine, and I was trying to
> think of a use other than a can crusher. Suppose you needed a 0.1uF cap
for
> a tesla coil tank circuit. I noticed that if a 0.1uF Geek cap is placed in
> series with a 2uF cap, the combined capacitance is 0.095uF (close to
0.1uF).
> The general idea is "tweaking" the 2uF cap with Geek caps to get 0.1uF or
> less. It seems to work on paper, but will it work in reality. It is
possible
> that impulse caps from x-ray machines don't stand up well in tesla duty.
>
> Godfrey Loudner
>
>
>