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Is wax paper a good dielectric for a large capacitor? Answered


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steveastroukBest Answer (author)2010-05-13

It was a pretty standard HT cap dielectric for years.

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jtobako (author)2010-05-12

Depends on the current, voltage, area, acceptable error factor and amount of damage acceptable in catastrophic failure : )

Will it work?  Yes, to some extent.  Reliable or repeatable?  Well, everything depends on your skill at that point.

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seandogue (author)jtobako2010-05-12

+1

I wonder if you could also try using something like cellophane.

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jtobako (author)seandogue2010-05-13

Cellophane from cigarette packages was used (along with the foil) to make the variable capacitor for a crystal set in an old set of instructions I saw somewhere.

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seandogue (author)jtobako2010-05-13

I figured it miught be useable. Many plastics are good dielectrics. That's why I wondered about cellophane (like saran wrap). Cheap and VERY thin, although I don't know off hand how it stacks up to wax paper on the dielectric constant. At a guess as good or better, so between thin, flexible, and *possibly better, it makes for a smaller package with similar or equal capacitance.

the actual values can be looked up in a handbook or online..

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