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>I think the Bosch coils are also oil-filled, it's just that they are full, with no air >space so they don't slosh. I'm not sure about this, though, they might just be >filled with tar, but you will notice that they develop an oily region around all >the seals as the years pass. That makes sense, I was confusing epoxy with tar, as that was what I thought was leaking around the seals. >There's nothing wrong with an oil filled transformer, in fact it's the best >insulation money can buy. At my former job I designed, built, and tested a >1:1 230V power transformer isolated for 175kV. It was oil filled and worked >like a charm. It's now a standard product for that company. I agree with you on the qualities of oil as an insulator on stationary equipment, but on a small, high vibration part? It seems that if the tar leaks out over the years, it must be really tough to keep the oil in there. Thanks for the info, Jim -Yancy Everhart ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/