System Hum from Tuner, Help! (I need somebody! Not just anybody?)

[nayr]

I got a Rotel RT-850A tuner recently. At first I didn't notice, but whenever it is plugged in it causes a hum in my system that is quite annoying. :x If I unplug the RCA connections, the hum goes away! It doesn't have to be on the tuner input, and even if the volume is at zero, the hum is still there.

I have a basic line conditioner, I've tried it plugged in that, but the hum persists.

Once, and only once, I plugged it in to listen and there was no hum! I left it plugged in and the hum returned about an hour later. :roll:

Does anybody have an idea of what the problem could be, and how to fix it? It would be a shame to get rid of this tuner as the sound is very good and I got it for dirt dirt cheap by chance.

Thanks! ;x(

[zmanbands]

Same wall outlet

If everything is not plugged into the same wall outlet try that. Don't overload the circuit.

[Russ L]

Often the video units have a different ground setup than audio units that do not interact well. Do you have a moniter/TV on that circuit? Try unplugging it. They are usually the culprits and can be highlighted by adding a new audio unit. When I added my Cambridge Audio 840 CD player it highlighted a ground problem my CRT was introducing to my power circuit. Try unplugging your TV or/and your TV/satellite cable.