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 2 responses by avguygeorge

I've had 2 CJ mono pairs,still have the 8xs---no hum. Me,I would swap out the ic's.---all of 'em. Fluorescent lights, anywhere in the house can cause such things as well. I also run a very good conditioner, that be Audio Response. The only hum I want is from the backup singers.
More on this fluorescent lights thing:--I sold a member an amp I had owned for at least a year and he complained about hum/ buzz---This amp was always quiet as a church mouse in my system---It ended up being this type of lights in his house.