Loud Audible Hum/Noise from C/J Tube Amps


Hello,
Anyone has experienced audible noise using C/J amplifiers: I have the LP70s and MV60SE. Once the preamp is turned on, the noise is too loud that can be heard 20-30 ft away. I was able to cured the problems by using th $49 cents plugs from home depot to bypass the ground loop. Any other suggestions? Is this normal for CJ amps? i have the same problem on both units...
Thanks
anthuan

Showing 1 response by audphile1

cable tv sometimes causes this. try taking the coax cable out of the cable box then turn the system on without the cheater plugs and see if the problem is still there.