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Need Help Systemdek and Grado Cart..Possible?

So I just bought a Systemdek IIX which has an unshielded AC motor. I want to use an unshielded Grado Reference Platinum cartridge with it. Does anyone have experience with taming the RFI from the motor?

I have never used Mu-Metal but I wonder if that will work...if so, how does one use it to shield a motor?

Or..

ERS cloth / ErsaMat... would using a sheet of ERS or an ErsaMat on the platter provide enough shielding to eliminate hum in my Grado cart?

Would anyone please share their experiences?
joelv

Showing 1 response by imispgh

imispgh
31 posts
 
Grados are one of the few unshielded cartridges. I had the black with my IIX before i figured that out. Major hum at the end of a record. Yes MuMetal works. pretty good. Make a wall between the two. I tried a sheet cut to match the platter figuring that would block it all. Nope - got worse. That just lets the 60hz field go to the other end and you get hum at the record beginning. You need to build a wall off the suspension.

The bests thing is just to ditch the cartridge. Go Goldring, Ortofon or Shure.
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