Been there done that. Your descripion sounds exactly like mine did. At the base of the turntable tonearm is a phillips screw.Go to Lowes or Home Depot and get a grounding rod and connecter.At home drive the rod in the ground outside as deep as possible near your system or room. Connect a solid wire to the base of your tonearm to the rod outside and anything else you want grounded. Still do the typical grounding to your preamp. This solved my problems with hum.
Ground Hum
I need some suggestions eliminating ground hum from my VPI Scoutmaster.
Cart is a Shure V15Vmxr (or whatever it's called)
Tone arm is JMW9 with stock wiring
Preamp is Dynavector P75.
I have tried a few different cables ranging from monster cable to cheap stock audio cables you find with most electronics. Makes no difference. If I touch the tone arm wtih my finger, the hum gets louder. If I touch the gold connectors on the back of the turntable the hum goes away. Touching any other parts of the tonearm output block or the preamp causes hum to get louder. Any suggestions?
A_L
Cart is a Shure V15Vmxr (or whatever it's called)
Tone arm is JMW9 with stock wiring
Preamp is Dynavector P75.
I have tried a few different cables ranging from monster cable to cheap stock audio cables you find with most electronics. Makes no difference. If I touch the tone arm wtih my finger, the hum gets louder. If I touch the gold connectors on the back of the turntable the hum goes away. Touching any other parts of the tonearm output block or the preamp causes hum to get louder. Any suggestions?
A_L