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Re: Oil caps
Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>
Tesla list wrote:
> Original poster: "rob by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> 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?
I have a similar capacitor which some one gave me. It's out in the
garage attic where I can't see it right now, but as I recall it has 8
dual-section 400 uufd capacitors in parallel, driven in parallel by a
gear train and mounted in a large lucite box filled with transformer
oil. Someone went to an awful lot of trouble, and I don't know why. As
I recall the total capacitance is about 0.02 ufd max. I've tried it as
the primary capacitor for a TC using a 9 kV NST and it broke down
There are a lot of oil-insulated transmitting variables available in
surplus, but nothing suitable for TC voltages.