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Revolver 'Rebel' Turntable extended leads Rotel RA 50 Amp - hum

My Revolver 'Rebel' Turntable connected locally to my new Rotel RA50 amp is fine if I place it locally next to the amp. Because I have'n't got room to locate it there I have it in the next room and connected to the amp via a long earth lead and the phono leads extended with two extensions and connectors. As soon as I switch on there is a loud noise (hum) through the speakers. Trying another earth makes no difference and disconnecting the earthat the amp makes it only slightly worse. Disconnect the phonos and obviously the problem goes away.
The phono extensions pass near mains cables from the CD player, cable box TV,etc and as I am running it around the edgee of the roomm (under the carpet, probably close to the ring main as well.
Any ideas how I can locate and remedy (if possible) the problem. As I said no extensions - deck earth and phonos directly into the amp - no noise at all

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Could try fitting a serpresser as like cars do
also try a farraday loop which means put a few loops in your lead

Posted on Sep 07, 2009

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