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Old 16th September 2017, 10:09 AM
Simon Simon is offline
Junior Member
Join Date: Sep 2017
Location: St Aulaye, France
Posts: 3
Default WAD 300bPP Screeching


After many years of service one of my monoblocks produces a deafening screech on power on. It lasts 5-6 seconds and then seems to operate normally, though I think the sound quality has dropped too. I have swapped out all the valves in turn with some spares I have, and I have checked the circuit for leaking caps or anything loose, but nothing seems amiss. Any ideas where to start?

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