I'm working on a Hafler 101 preamp that has a buzz/hum through both channels. It happens with any amplifer and it's variable with the volume on the amplifer. In other words, if I keep the volume on the amp (Super T) low, it's not as noticable as when the volume is turned up on the amp to a higher level. I've grounded the unit. Anyone out there have any ideas as to where to start. Anyone out there work on these things?
Thanks,
Tony