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RE: Oil Dielectric Properties



Original poster: "Scott Bogard" <teslas-intern@xxxxxxxxxxx>

Chris,
Very creative, The only problem I foresee, is that it is going to be very difficult to actually secure the components (plates leads etc.) as they will need to be very close together depending on the dielectric properties of oil, and the breakdown voltage. If they are too close together, it will arc over (not to mention, it will become increasingly more difficult to dissolve the salt away), and if they are too far apart, your capacitance will be pitifully low. But as a person who likes to meddle with the established way of doing things, I say try it, and let us know how it goes. You might do well to construct the "container" one layer at a time, out of clay or epoxy. and have your leads sticking out the side, just a suggestion. Have fun.
Scott Bogard
P.S.  Just look around for a dielectric table, and look at the oil values,
I think mineral oil is 2, but I don't know for sure, also investigate different types of wax, it may allow you to skip the steps of dissolving salt. Good luck.


From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Oil Dielectric Properties
Date: Thu, 12 Apr 2007 20:38:25 -0600

Original poster: "Breneman, Chris" <brenemanc@xxxxxxxxxxxxxx>

Hello,

I was once again considering possible unique methods of homemade tank capacitor construction, and came up with this idea: In a jar, or some other kind of uniform container with an open top, place a plate of metal at the bottom. Glue the plate of fasten it to the bottom by some means. Then add a layer of salt to the desired dielectric thickness. Then add another metal plate cut so that the lead is on the opposite side of the container (of course the leads on alternating plates alternate) and glue or fasten it to the side of the container. Then repeat with the salt and plates until the container is filled. Metal plates should have some kind of opening in them, either a drilled hole or a space left for the opposite leads on the sides of the container. After this is done, the plates should be stationary and fixed to the sides of the container. The salt could be poured out or dissolved with water, and the container could be filled with a liquid dielectric, such as oil. Such a capacitor would be self-healing, always a useful trait. Anyway, I was wondering what the dielectric properties of various kinds of oil are at high frequencies to determine whether a capacitor constructed in such a way would be feasible for Tesla coil use. Also, if anyone sees any general design problems with this, suggestions are of course welcome.

Thanks,
Chris


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