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Old 10th May 2011, 6:34 pm   #19
Marconi_MPT4
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Join Date: Mar 2011
Location: Dorset, UK.
Posts: 519
Default Re: Beware!

I had the same problem only three weeks back with a Rifa capacitor failing in the Revox B760 tuner. Went out of the room for only five minutes and came back to find copious amounts of smoke filling the place. Here the 'power switch' only switches the secondary so switching off had no effect! On this tuner the mains fuse is 250mA but it did not blow.

Checked capacitor on a megger and the leakage at 500v measured around 2M ohms. After a while it failed permanent short. This one was an original component so would date it to early 1980's

Cheers

Rich
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