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grado reference statement hum

I just purchased a grado reference cartridge for my wilson benesch table with act.5 arm. I am getting hum when the arm moves closer to the motor (end of record). This did not occur with the ply cartridge that came with the table. Any thoughts? How to cure?
drjaws
76doublebass's avatar
76doublebass
254 posts
 
I can't speak for this Grado.I have a Silver Grado with VPI MK3 Table,and was at one time having problems with mine similar to yours,and had to use a better shielded toenarm cable straight din to RCA onto the phono of preamp.
newbee
4,767 posts
 
Grado's are notorious for the poor shielding of the cartridge, which in your case is picking up hum from the TT's motor. Used to be a problem for me until I got a TT with a well shielded motor. I've seen suggestions in the past for shielding motors. Perhaps some one will chime in with some suggestions.
drjaws OP
3 posts
 
hopefully someone will know how to shield the motor. I like the sound but hate the hum. The ply was way too "digital" for my tastes
bob_bundus
1,834 posts
 
try the mu metal shielding material
drjaws OP
3 posts
 
where does one obtain mu metal?
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