The RF I'm getting could very well be AM, I haven't listened to AM for years, so made this mistake, regardless, still getting RF at night, Spanish speaking talk radio -- any suggestions on brands of a ferrite RF filter? Will also try switching the tonearm cable. Again, thanks for all the suggestions.
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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Here's an excellent paper, dealing with rfi problems caused by ham radio systems, but providing a lot of information that may be applicable to your situation as well: http://www.audiosystemsgroup.com/RFI-Ham.pdf Here's a link to the catalog of Fair-Rite, which makes a lot of these things: http://www.fair-rite.com/newfair/index.htm Radio Shack (you'll pardon the expression :)) sells some snap-together ferrite choke cores, part numbers 273-104 and 273-105 according to an older catalog I have. Hope that helps, -- Al |
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