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Linn LP 12 hum not coming from Bryton phono stage.

I’m getting a pretty significant hum with my Linn Sondek LP12 turntable sitting on top of my equipment stand. My new Bryston MM phono stage does not hum at all when the turntable RCA interconnects are disconnected.

Yes, I have the grounding wire attached to the grounding lug on the phono preamp. I plan to move the TT to the original Sound Organization wall shelf to get it away from the adjacent electronics.

Will moving it to the wall shelf do anything to eliminate hum? What about transitioning to the better "Radikal" power supply and DC motor (the original has the Valhalla board I believe and the AC motor).

Thanks, for any suggestion you might have for things I can check.


edit: I must be tired, I noted that I mis-spelled Bryston as "Bryton". Titles cannot be edited, arghh!

masi61

Showing 5 responses by lewm

lewm
13,476 posts
 
The siren rising in intensity is or was evidence of positive feedback, somewhere. Good that you put a stop to it as you might damage your amp and or speakers.
lewm
13,476 posts
 
What I was getting at is whether the hum is due to a direct interaction between the cartridge and the TT motor.  One manifestation of that would be that the hum is loudest when the cartridge is nearest to the motor.
lewm
13,476 posts
 
Have you noticed whether the intensity of the hum changes as you listen to an LP, from outer grooves to innermost grooves?  If not, you might do that experiment and report back.  Absent a defect in your current power supply, I doubt that the PS itself is the problem.  Or to put it another way, don't spend the money on a new PS solely in order to cure this problem.
lewm
13,476 posts
 
Cartridge?
lewm
13,476 posts
 
Cartridge?
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