Yes, I've had several people bring their turntables to us for this problem. The tricky bit was how to attach the wire to the motor; I did it by filing off some of the plating on the motor which exposed enough material that I could solder to. I simply connected the wire to the ground of the arm and presto! no more hum.
To me its common sense to ground not only the motor but also the platter bearing. The first time I did this was a good 15 years ago and this problem still isn't fixed!
To me its common sense to ground not only the motor but also the platter bearing. The first time I did this was a good 15 years ago and this problem still isn't fixed!