Original poster: Ian Macky <ian.macky-at-oracle-dot-com> > i built a cap with 1.6 mm or 64 mil thick PE dielectric and put the > whole thing in canola oil. It worked great for a while but while i had ...snippity... btw, best not to use vegetable oils for anything but cooking: they go rancid eventually, very nasty. "mineral" oil (e.g. petro based) [or synthetic?] is the way to go.