I don't recall what an equivalent dc rating might be on oil filled (non PCB) caps. In particular, the Aerovox p/n H83R6654S21, 54 uf. 660vac @ 60 cps. Thanks, Merit W6NQ -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.contesting.com/km9p/search.htm