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Re: rolled caps [Oil source ? ]
From: Geoff Schecht[SMTP:geoffs-at-onr-dot-com]
Sent: Thursday, September 11, 1997 12:34 PM
To: Tesla List
Subject: Re: rolled caps [Oil source ? ]
<mega snip>
> >
> >Cheers,
> >
> >Peter E.
> >
> >
> >
>
> Thank you all for helping me with this. I would have liked to use more
> plates than just two but with the thickness of PE and quantity I have
> little choice but to have three sheets of 30 mill between two plates.
>
> My next problem, what kinda oil does everyone use to insulate this. I
> have seen mineral oil used, but I can only find it at Wall Mart, a tiny
> bottle for $2. Were does everyone get large quantities of this? Or is
> there some other oil - like transformer oil? I have been unable to
> locate any transformer oil.
>
> Any further help would be appreciated,
> Mad Coiler
>
Hi Mad,
Some mineral oils can contain contaminants (including moisture, as an
emulsion, I'd guess). Try to get a USP grade of mineral oil, if that's what
you go with. Any medical or chemical supply house carries that stuff in
quantity. Actually, there are a lot of non-PCB transformer oils out there
that you can buy (some mineral-oil based, others use silicone or other
synthetic compounds). You might call your local power company and ask what
they use in their distribution transformers; maybe they'll give you a few
litres gratis (be sure that it's new if you get it from there). Silicone
oils would probably be the best to use since they're completely synthetic,
quite pure (in a CP grade) and are the least likely to break down or
oxidize under ozone/electrical stress.
Geoff