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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
noromance's avatar
noromance
9,818 posts
 
Always consider the proximity of wifi and routers as these can cause significant interference.
daveyf's avatar
daveyf
2,874 posts
 
Valhalla's are getting long in the tooth, does the table hum if you place it somewhere else? If so, I would look at the Valhalla board. BTW, the Bryston phono stage is really good.
lewm
13,101 posts
 
Cartridge?
masi61 OP
97 posts
 

Thanks for the replies, the cartridge is a Linn K9 MM. I did move the table to the other end of my double wide equipment stand. It definitely hums when playing music - which kind of stinks because my digital system is dead quiet. No WiFi or routers are nearby.


I will have to check and see if it hums while the RCA's are connected but the power cord is disconnected.

I will be taking it in to get an upgraded (Radikal, Akurate chassis) power supply and motor later this summer. It will be interesting to see if this eliminates the hum.


masi61 OP
97 posts
 

@daveyf  - I'm glad to hear you say that the Bryston Phono stage is really good. I don't have much to compare it to other than the one in my old NAD pre-amp. The gain on my MM only stage is a bit lower apparently than is should be because on some records I have noticed a need to turn the volume control up quite a bit higher compared with my Sony XA-5400ES SACD player or my Wadia -171i iPod dock.

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