2. amps-preamps
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Hum in my system; its the turntable R and L interconnects. Huh?

Pioneer PL-570 reconditioned turntable

EAR Phono Box

Cambridge Audio Integrated amp

DALI Floorstanders

I have a very pronounced "Hum" in my system, sounds like a 60cycle hum. I tried all the troubleshooting steps; it originates in the EAR, which has just recently been serviced and has new Goldline tubes. But here is the kicker, if I disconnect the R and L TT interconnects the hum cuts out and I get a fine white noise sound of much less volume. The TT produces the hum in the system even if the TT is unplugged from the wall receptacle. Removing the ground wire from the TT to the EAR has no effect. I can place my ear on the EAR case and hear nothing, dead quiet. A fault inside the TT?

jereeb

Showing 2 responses by buellrider97

buellrider97's avatar
buellrider97
471 posts
 

  Could you eliminate the power ground by using a cheap 2 prong wall adapter. Or use an extension cord to power the TT from another circuit ? 

buellrider97's avatar
buellrider97
471 posts
 

Did this just start one day randomly? You mentioned your repair prior to this happening. As mentioned above cable shielding was an issue for me. I have a modded Thorens with a Grado Prestige cartridge. When I hooked it up I lacked a good pair of cables so I tried a pair of Anti-Cables level 3 non phono that I had in the leftovers box. The TT is close to my plasma TV and the 60hz hum was noticeable as my ZU’s are high sensitivity. Another random thought is a friend just asked me for advice regarding his vintage Pioneer TT. It’s having noise issues only when the arm is moving from the rest over to the record. Once it hits the record it stops. It’s always something, but yours is definitely interesting. I think we’re as eager as you to know the cause. Regards , Mike B. 

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