Noise through speakers when I tap the Source Switch.

I have a Unison Primo, only a few years old. I just noticed that when I tap the

knob to select source I can hear it through my speakers. Could there be a problem

with something? It's a hybrid, tube pre. Other that that it's quiet.

Thanks for any help.

vinylvin04-13-2020 4:29pm

yogiboy Details Discussions Posts This discussion Message User 5,484 posts 04-13-2020 at 04:35pm Copy Comment URL Report Comment Edit Delete It sounds like one of the tubes is microphonic. Try tapping on each tube and see if you hear the noise!
vinylvin OP Details Discussions Posts This discussion Message User 145 posts 04-13-2020 at 05:00pm Copy Comment URL Report Comment Edit Delete Thanks, that's what I thought but I read I would hear it when music was playing also. I replaced the stock tubes with some NOS ones right after I bought it. I'll try that. I'll have to do it at the end of the week. I'll try the stock ones also.
vinylvin OP Details Discussions Posts This discussion Message User 145 posts 04-16-2020 at 09:57pm Copy Comment URL Report Comment Edit Delete I turned it on today tapped, nothing. Listened for a few hours, tapped again, nothing. I guess it just went away.