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Old May 27th 16, 01:42 PM posted to uk.rec.audio
Dave Plowman (News)
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Default Yet another thump problem. ;-)

This time, a BBC AM8/16. Basically, a BBC modified Quad 405 to drive the
LS5/8. Has a crossover added to the input to the amps.

One of the two produces a pretty loud squawk on switching off. Not a fault
as such, as plenty early BBC ones in service did the same. But the BBC did
seem to find a cure. The pair I had were ok.

Sadly, the three circuits I've got for the crossover are all the same.

I've only got the one amp here, so can't just look for any differences.

I can post a link to the crossover circuit if it helps. It gets its power
from the + side of the Quad PS and regulates that down to 30 volts.

--
*A cartoonist was found dead in his home. Details are sketchy.*

Dave Plowman London SW
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