Hum Problem with Grado


I recently helped my friend set up his VPI Aries Extended. He is temporarily using an inexpensive Grado ($80 Red?) cartridge but we are hearing significant hum. We grounded the table, which helped, but the hum is still very noticable. Anyone have experience with hum using a Grado and how can we solve this problem? Rest of the system is AR SP16 and VS110 w/ Proac Response 3s. Thanks.
dodgealum
Another way to eliminate the hum is simply to see to it that the motor has a wire between it an the tonearm ground. 
I tried that too, connecting ground wire to motor (bearing too).  Didn't do a damn thing... 

In this case, the problem is magnetic, and you have to deal with it very differently.

Nice rule of thumb:  If you hear "buzz", it is electric field coupling, add a ground wire.  If "hum", then magnetic field coupling, add distance. 
I have NO hum with Grado XTZ on all my turntables (i have 7 of them).
You’re better search what atmasphere posted in another thread, the problem is your turntable.