Re: big cap

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

Original poster: "Crow Leader by way of Terry Fritz <twftesla-at-qwest-dot-net>" <presence-at-churchofinformationwarfare-dot-org>

Some high repetition pulse caps are polypropylene. These ones are probably a
good choice for tesla coil use. Polypropylene caps require more expensive
impregnants (silicone oil is used) than say mylar+paper caps that can use
mineral oil. Mylar and paper is great for low rep pulse duty if wired well
enough for current. Otherwise it's a DC filter cap.

KEN


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 28, 2001 4:49 PM
Subject: Re: big cap


> Original poster: "Mike Waddick by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Mikew-at-winternet-dot-com>
>
>  Hey,
>
> I have heard that pulse caps use a Mylar dielectric. That would mean they
> are not suited for tesla coil duty. I would assume that Mylar is used
> because mylarr has a high breakdown voltage (7500v) and also a high
> dielectric constant. If you can't find a use for the cap I know someone
who
> could use it :) ME!!
>
> Those things aren't easy to find, a little off topic but where do people
get
> these? You can reply to me offline. I would be willing to pay for one if
> anyone is willing to sell. It would be GREAT if someone had one in the
> Midwest area.
>
> Thanks a lot,
>
> Mike Waddick
>
>
> ----- Original Message -----
> From: Tesla list <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Saturday, July 28, 2001 3:26 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
> >
> >
> >
>
>
>
>