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Ground loop hum

My technics turntable developed a ground loop hum when I got a new preamp Rogue RP7 and power amp Aesthetix Atlas.  I had a ground wire connected to the turntable and grounded it to each, one after the other when the first had no effect. Neither did the second grounding. It has been suggested I ground it to both at the same time which I haven’t tried yet. Any other suggestions?  I am running the system from two dedicated 20 amp lines. Running Vandersteen Quatro wood ct speakers.  Thanks in advance. 

kavakat1

Showing 1 response by panzrwagn

panzrwagn's avatar
panzrwagn
641 posts
 

@jea48  You clearly understand what causes hum, now its a matter of where and how. You’re doing all the right things. That the hum is controlled by the volume control and only on the phono input narrows it down a lot.

@kavakat1 One more variable though, what kind of cartridge is being used? 

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