Re: Air core variable cap...

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

Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>

Hi Wells,
I did this with a small tuning capacitor that i had taken out of an
arc-5 transmitter, I wanted to use it on the gm hei spark length record
attempt. I was amazed at how much capacitance i gained by just immersing
the multiplate cap in mineral oil, It went from 15pf in air up to 45pf
in oil. The cap has a plate separation .047".
I think a castor oil or even glycerin would bring that up nicely?
Take care,
Marc M.

Tesla list wrote:
> 
> Original poster: "Wells Campbell by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <wellscampbell-at-onebox-dot-com>
> 
> Just a thought...
> 
> what would happen if one were to submerge that air core cap in castor
> oil, for instance? it seems like the capacitance and voltage rating would
> both go up considerably, enough to make it useful as a small tuning cap
> in series with tank caps?
> 
> I haven't been following the thread too well, so pardon if I'm being
> redundant...
> 
> --
> Wells Campbell
> wellscampbell-at-onebox-dot-com - email
> (415) 430-2169 x3756 - voicemail/fax
> 
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