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will grado hum?

in the past I have had problems with grados and "s" shaped arms such as MMT. has anyone used grados ( $500. and up ) with the ALPHASON HS 100? other equipment includes UNISON 845 SE, JOULE 100 pre amp, and OPS phono stage, SOTA STAR SAPHIRE w/ hold down and VR4s
thanks
potsey
atmasphere's avatar
atmasphere
7,068 posts
 
Piedpiper, sure. I ran a wire from the case of the motor to the bearing of the platter, and from there to the base of the arm, so that they were all grounded. I had to scrap some of the plating off of the motor case in order to be able to solder to it.
piedpiper
753 posts
 
Thanks Ralph.
dkzzzz's avatar
dkzzzz
119 posts
 
The other way to fight the excessive hum would be to glue a sheet of Mu-metal to the mat or platter.
atmasphere's avatar
atmasphere
7,068 posts
 
Dkzzzz, you don't need to. The hum with Regas and Grados is caused by the ungrounded parts, and is easy to solve.
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