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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 2 responses by eldartford

eldartford
4,262 posts
 
Almarg...A corrosion-formed diode can indeed rectify an AM station's signal so as to produce recognizable audio. In my experience what you usually get is a mixture of several stations, some louder than others.

However, it takes a lot more than a diode to pick up recognizable audio from a FM signal.
eldartford
4,262 posts
 
Some FM stations also broadcast on AM (or used to). Since demodulating FM by accident is virtually impossible something like this should be investigated. Many AM stations are required to REDUCE power at night because the signal travels so much further...to places where another station operates on the same frequency.

Are there any practical jokers near you?
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