Tube amp buzz (amp, not speakers)


Hello - 

Almarro a318b makes buzzing sound at random: sometimes it does, sometimes it doesn't, completely unpredictable. The buzz comes out of the amp itself, like a transformer buzz; the sound out of speakers is completely clean. 

I'll appreciate any ideas - what causes it, what to do?
boriso

Showing 1 response by geoffkait

Well, after all, the AC is 60 cycles. Hmmmmm. The other troublesome thing about transformers is the rather significant magnetic field they produce.