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RE: Motor run capacitors revisited

Where we were using the motorun caps were in the power supplies of tube amps.There,they happened to work well for filtering 120hz.They are metallized poly film caps with an oil additive for additional cooling.I think the Klipsch Belle crossover used a small motorrun for bass but can't be sure.
I don't use motorruns in crossovers but use them in Cary Amp power supplies to replace the series connected 1200uf caps with a parallel connected 70uf motoruns.That yields a big improvement.
Now that Panasonic,CDE,Wima,and others are making reasonably priced large value film caps,motoruns have fallen by the wayside,much due to their physical size.

"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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