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How to eliminate FM RF coming thru turntable?

Mitchell GYRO SE turntable picking up FM RF after 5 PM to late at night. During the day, no FM RF being picked up by turntable. All other components, no RF (tuner, CD, tape). All components connected thru Furman power conditioner. Have run separate ground from Furman to turntable ground at preamp (Rogue 99) which reduces the FM RF considerably, but does not eliminate. FM interference reacts to volume control. FM RF disappears when turntable leads disconnected. Any suggestions?
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Showing 3 responses by sbank

sbank's avatar
sbank
3,378 posts
 
Are you using a tube or solid state phono stage?

I had similar problem and after trying many great tube phono stages, eliminated the trouble only by switching to ss phono stage. Cheers,
Spencer
sbank's avatar
sbank
3,378 posts
 
mouser.com also sells cheap ferrites.
sbank's avatar
sbank
3,378 posts
 
Copper is a lot safer than lead, and would provide the same benefit. If you go this route research the term, "Faraday Cage", which is a lab quality box. The problem is that you need cables going in/out and that often corrupts the ability keep out the RFI.

Borrow a solid state phono stage before you conclude anything else or spend big bucks. Trust me, I struggled w/this crap for YEARS! Cheers,
Spencer
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