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bluesboy

Juicy Music Tercel ground problem

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I'm running a Micro Seiki turntable into a Juicy Music Tercel phono preamp to an old Eico preamp (using until my new Transcendent Sound grounded grid preamp gets here) to a Transcendent Sound Mini Beast amp. The system is making a hum that I thought was coming from the Eico preamp until I disconnected the the Tercel from the Eico and the hum went away. I had the turntable ground run to the ground post on the Tercel assuming that that would be the best way to ground the turntable. I tried grounding the turntable to first the Eico chassis and then to the Mini Beast chassis with no luck getting rid of the hum.Any suggestions?

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Have you tried lifting the ground between the turntable and its preamp?

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  Also look at grounds in your AC. I have needed to use a cheaterplug. The Eico should be a 2 prong. 

  Phono are famous for hum. Might be magnetic flux from a transformer coupling into circuitry. Step up trannies are hum magnets.

  Try moving the units around if grounding does not fix.

  

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Thanks guys for the suggestions. I disconnected the ground the ground wire from the turntable to the phono preamp and the hum got really loud then reconnected the the ground and the hum is still there but diminished. So I'm thinking that the new grounded grid preamp might solve the problem.

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Thanks for trying that one and reporting.  Too many grounds can create problems (https://en.wikipedia.org/wiki/Ground_loop_(electricity)) and that was one thing I was curious about in your case.

 

As has been alluded to already, the presence of nearby sources of electromagnetic radiation could be a cause of the problem.  Not being familiar with the "Juicy Music" product you have, I just now looked it up.  One returned link was http://robertmusic.blogspot.com/2008/12/juicy-music-tercel-or-why-upgrades-are.html which I didn't read throughout, but did notice something early on about "hum".  I hope you find satisfaction without too much trouble, but I've pretty much offered all I can at this point.

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