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New Sugar Cube is picking up hum from phono stage

Phono stage is the source of the hum.  It is in my new system and the phono stage is a PS Audio Stellar.  The ground wire is secure between the TT and phono stage and there is no hum if the Sugar Cube is powered off.  It is a low level 60 cycle hum.  The new Sugar Cube is model SC-1 Plus.  I have tried moving the two units apart, up one shelf, but that made little difference compared to stacking them.  I would like to add a shield between the two components and stack them.  Has anyone had a similar experience, or can offer advice or reference guidance?

billstevenson

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cleeds
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billstevenson

Phono stage is the source of the hum. It is in my new system and the phono stage is a PS Audio Stellar. The ground wire is secure between the TT and phono stage and there is no hum if the Sugar Cube is powered off.  

Is the Sugar Cube, phono stage and line stage all plugged into the same AC line? That would help eliminate a ground loop and may make the TT/phono stage ground wire unnecessary.

If the hum only occurs when the Sugar Cube is powered on, I'd suspect it rather than the phono stage.

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