Jim,you asked an interesting question about something I hadn't thought of before. I tried a quick test with a pair of back-to-back caps bypassed by diodes, between a known source of DC offset (400mV) and mains. I connected a toroid transformer that is susceptible to DC on another branch circuit. The DC blocker reduced the audible level of transformer noise by about 2/3.
Amp hums in standby mode when TV is on
Hi, my Sherbourn 5/1500A power amp starts humming whenever the TV in the same room is operating. This occurs even when the amp is in its standby state, and also happens when using the amp(although you can't typically hear the humming at that point because of the sound from the speakers). What's more, as the image on the TV varies in brightness, the intensity of the humming/buzzing also varies. If the TV is off, the amp is dead quiet. I am assuming this is some kind of ground loop problem.
Should I try to plug the amp in with a "cheater plug"? There is a sticker on the back of the amp that indicates that the amp must be used with a grounded power cord.
Should I try to plug the amp in with a "cheater plug"? There is a sticker on the back of the amp that indicates that the amp must be used with a grounded power cord.
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- 15 posts total
- 15 posts total