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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
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Showing 4 responses by bradf

bradf's avatar
bradf OP
324 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
bradf's avatar
bradf OP
324 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
bradf's avatar
bradf OP
324 posts
 
Even though the locall dealer has encountered a similar hum using the supplied sub platter, I dont recall having this hum untill after I had replace the sub platter. I should probably reinstall the oem subplatter. Grounding the Lehmann also sounds like a good idea
I would like to thank everone who has contributed.
First chance I get, I will report back the results
Thnx again
Brad
bradf's avatar
bradf OP
324 posts
 
Clatch08
Thnx, I have some flexibility in my rack(s), so I think I will try to sperate the TT,TT PSU, Lehmann, and Lehmann PSU
as far from each other as I can get them. But bear in mind that the hum I am experencing is not noticable untill the stylus gets really close to the lable and stops all together when you move the cartridge about 1/2" away from the lable.
Thanks for your help
Brad
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