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RFI noise/ FM overlay Any way to eliminate it?

I live in a high rise apartment in Honolulu Hawaii. Last year, I purchased a Jolida JD-9 phono pre-amp which mostly uses tubes. Right out of the box, it picked up RFI noise on one channel then overlayed the FM transmissions on both channels I tried everthing to eliminate it, but nothing worked, I subsequently sold the unit. I have avoided any type of tube components or hybrids. However, I have a chance to buy a used/VGC Musical Fidelity A-5 which uses a tubed output stage. My question is this will I experience the same RFI and FM interference as with the Jolida phono box because they both use one or more tubes.

I don't understand how design similarities(tubes)could possibly produce the same problems. BTW, There is a FM transmission tower about 1 mile away, but I don't know if its signals affect my building. Therefore, I need some advice as to whether I will have similar problems with CD player, and want to avoid hassles with the buyer regarding a return. I do use a power line condition, an Audio Prism Wedge which is about 15 years old; but it did had no affect on eliminating the problem with the Jolida. All advice and comments welcomed. Thanks, Jim
sunnyjim

Showing 1 response by sunnyjim

sunnyjim OP
927 posts
 
Thanks to those who responded so far. Mezmo, I wrapped the PC cord o the Jolida phono box in aluminum foil as instructed by a friend and also the pre-amp PC. Nothing was improved!! I should have saved the foil for Thanksgiving left overs.

Al, I was thinking along the same lines as you suggested. that the single or multiple tube output stage of the A-5 CD player should produce much less signal to cause RFI problems

Lears; I do use a power line conditioner made by Audio Prism that is about 15 years old, and always was able to eliminate most RFI. When I lived in San Diego, I was about 2 miles from the Naval Air Station, and never got any errant transmissions from their tower
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