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Re: Capacitor Dielectric
Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Mddeming-at-aol-dot-com>
In a message dated 5/24/01 10:15:53 PM Eastern Daylight Time,
> Original poster: "shimonek2 by way of Terry Fritz <twftesla-at-qwest-dot-net>" <
> I am just getting started on my first tesla coil. I have located a 15 KV /
> mA NST and have begun work on building my capacitor. (couldn't find enough
> cheap caps for a MMC) I am using 19 Al plates 6" x 8" separated by a
> of 1/2" submersed in oil. According to my calculation using a K of 2.2 for
> mineral oil that will give me a .0055 uF capacitor. This seems like a very
> simple and easy to construct design, have others tried it? By mineral oil
> the charts referring to motor oil? Can I use motor oil? I even considered
> adding a quart of Slick 50 for the added PTFE. Any thoughts?
No, mineral oil is Not motor oil. It is a colorless liquid, used as a
laxative for people and cattle and as a solvent for many insecticide sprays.
It is often available in gallon jugs from farm supply or garden stores,
nurseries etc. Drug stores sell it, highly refined, in 4-8 oz bottles for the
same price as a gallon from the local weed & feed. Mineral oil also has a
higher flash point than most motor oils. Also, the clear liquid looks cooler
IMO than the yellow-brown motor oil, especially if you use something like a
real fish tank for your tank cap.