Re: Air core variable cap...

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

Original poster: "Area31 Research Facility by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rwstephens-at-hurontario-dot-net>

Glycerin appears to be totally unsuitable as a capacitor dielectric in a HV
capacitor. It failed utterly in my HV breakdown tester. I do not know if that
was because of possible water content in the sample acquired from a bottle of
the stuff bought at the corner drugstore, or something to do with its basic
chemical structure. It definitely works better than mineral oil as a coffee
sweetener however but I have no data on the toxicity.
 
Castor oil would be very good in the dipped, 'cheese-slicer' variable capacitor
combo.
 
Another item that would probably make a great TC tank cap by immersion in
castor oil would be those electrostatic air cleaner modules of alternating air
spaced thin metal plates.  I saw a pile of these, cubes about 2 feet on a side,
at a scrapyard once.
 
Rob 
>
> ----- Original Message ----- 
> From: <mailto:tesla-at-pupman-dot-com>Tesla list 
> To: <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com 
> Sent: Sunday, January 13, 2002 23:21 
> Subject: Re: Air core variable cap...
>
> Original poster: "Metlicka Marc by way of Terry Fritz
> <<mailto:twftesla-at-qwest-dot-net>twftesla-at-qwest-dot-net>"
> <<mailto:mystuffs-at-orwell-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 
> <<mailto:twftesla-at-qwest-dot-net>twftesla-at-qwest-dot-net>"
> <<mailto:wellscampbell-at-onebox-dot-com>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 
> > <mailto:wellscampbell-at-onebox-dot-com>wellscampbell-at-onebox-dot-com - email 
> > (415) 430-2169 x3756 - voicemail/fax 
> > 
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