Another Hum Problem Question


My Bel Canto EVo digital amp is supposed to stay on all the time. Thursday I got new balanced cables. I also got a new pre this week. If nothing is connected to my amp, it's quiet when every thing else is cut off. If I connect the balanced ICs I get a low volume hum through the speakers. You can hear it at one foot from them. If I connect the other end of the ICs to the pre, I still have the hum. If I then cut the pre on, every thing is dead quiet.
I have tried disconnecting all components to see if one is causing the hum.Nope. I tried a cheater plug on the pre. Nope.
Do I have a bad set of ICs? Bad preamp ground when it's cut off? Help--sorta since it's only anoying since it wasn't there before and goes away when using system.
claud
claud

Showing 1 response by claud

Hum problem solved. Preamp drops it's ground as part of it's protective circuit when it's cut off. Company pres said to leave it on 24/7. Tubes will last about four years.I didn't call him, he called me because I had talked with his support person about this and other hums .Amp and pre are both on--dead silence. Merry Christmas guys and thanks for your help.
claud