Is there a grounding wire from the arm that you can attach to the preamp's chasis? That may help.
Tube Pre-amp Phono 60 Cycle Hum - Big Time
I have a Linn Sondek LP-12 with Valhalla which I just setup for the first time. It came with BNC connectors so I had to get 2 RCA adaptors which fit to the MC of my tube pre-amp.
My question is this; I attached everything on the Linn Sondek to the pre-amp and got significant 60 cycle hum in the phono stage. Even when I disconnect the turntable from the pre-amp I get tremendous hum on the phono stage when
turning up the vol. control. There is a very slight hum on CD and Tuner, but not bad and nothing like in phono. Everything goes into a Monster Power 5100 power conditioner. Any suggestions on what is wrong and how I can fix it?
My question is this; I attached everything on the Linn Sondek to the pre-amp and got significant 60 cycle hum in the phono stage. Even when I disconnect the turntable from the pre-amp I get tremendous hum on the phono stage when
turning up the vol. control. There is a very slight hum on CD and Tuner, but not bad and nothing like in phono. Everything goes into a Monster Power 5100 power conditioner. Any suggestions on what is wrong and how I can fix it?