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Rega Turn Table Hum

I have a P5 and have recently noticed that once the arm/cartridge is at the last song nearing the lable, EMF hum is being introduced I believe from the motor into the cartridge. I never noticed it prior to instaling a groovetracer subplatter, but according to my local Rega dealer they have experienced it using the standard plastic subplatter supplied with the TT.
I would be very interested in hearing from any fellow Rega owners that may have a corrective action to eliminate the hum.
I recently came across (Direct Music Web) a product called ERS cloth which is suppose to block RFI (Radio Frequency Interference) and EMI (Electro-Magnetic Interference). ERS cloth is a blend of carbon fibers coated with proprietary metals that make it virtually impenetrable to RFI. It comes
in 8"x11" sheets.
If any one has any experience with the ERS cloth I would also be gratefull for your input.

Thnx
Brad
128x128bradf
mickeyf
153 posts
 
Is it a Grado cartridge by any chance?
bradf's avatar
bradf OP
329 posts
 
SORRY I HADN'T MENTIONED THE CARTRIDGE TYPE.
I HAVE A LYRA DORIAN, AMPLIFIED BY A LEAHMAN BLACK CUBE WITH SEPERATE POWER SUPPLY. ALSO OPTED FOR THE REGA PSU.
I TRIED SWAPPING OUT POWER CORDS, WITH NO BETTER RESULTS.
ITS VERY APPARENT THAT THE CLOSER YOU GET TO THE MOTOR THE GREATER THE HUM. I HAVE CONFIGURED THE CARTRIDGE TO HOVER OVER THE LAST FEW GROOVES OF THE LAST TRAK AND IN SOME SONGS THAT ARE POSITIONED CLOSER TO THE LABLE YOU CAN HEAR THE HUM, BUT PLAYING THE SAME SONG TO THE END WITH MY EAR PRETTY CLOSE TO THE SPEAKERS, I AM NOT SURE IFI CAN HEAR ANY OF THE HUM. MAYBE WITH THE STYLUS IN MOTION IT CANCELS OUT THE HUM, BUT THATS ONLY A GUESS AT BEST. BY THE WAT IT OCCURES IN BOTH SPEAKERS

THNX
BRAD
mickeyf
153 posts
 
I've heard of the ERS cloth. You could probably start experimenting with various shields, lead sheet or even tin foil slid under the subplatter FWIW and see what happens....
also try turning the cartridge clips a little bit to adjust your contact, there may be a ground issue too. There's a lot of other things you can try including chnaging receptacles to a different circuit (start with an extension cord). TT different from the other gear.
bradf's avatar
bradf OP
329 posts
 
Thank You, I really appreciate your help
Those are some good ideas.
I wont be able to employ those ideas for another day or so, but I will let you know
Thanks again
Brad
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