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Re: Oil caps

Original poster: "rob by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rob-at-pythonemproject-dot-com>

Tesla list wrote:
> Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> Castor oil has a fairly high epsilon (Er) compared to mineral oil.  The
> breakdown voltage, though, is the same as most other oils.  Check
> http://home.earthlink-dot-net/~jimlux/hv/insulliq.htm where I have a tabulation
> of some common liquids.
> How far are the plates spaced on your variable caps?
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Saturday, May 04, 2002 11:40 AM
> Subject: Re: Oil caps
> > Original poster: "rob by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <rob-at-pythonemproject-dot-com>
> >
> > I have some really big variable caps, maybe 2000pf or so.  I'm wondering
> > what would happen if I mounted one vertically in a can filled with oil.
> > I guess I'd get 2000pf x Er.  With Castor oil, I think that would be a
> > 0.024uF variable cap.   Rob.  ps. What is the breakdown voltage/mil with
> > Castor oil?
> >
> > Tesla list wrote:
> > >

Hi Jim,  these are surplus military receiving type caps.  They may have
as much as 4000pf.  In the original equipment, there were four of them
driven together with a gear.  I use one for a giant 160M rod antenna
that I have.  I think the rest are gathering dust.  Rob. 

The Numeric Python EM Project