Hi Geor,
If you are happy to go inside the deck, I would disconnect the short earth cable from the armbase to the sub-chassis.
I would hazard a guess that this would cure your hum problem.
The chassis is earthed thru the psu and the arm cable will be earthed at the phonostage.
I've had a few instances (with Linn arms)where disconnecting the short loop to the sub-chassis has cured hum problems - worth a try.
Why this set up sometimes causes a ground loop defeats me but I know from using lots of non -Linn arms which don't have the short extra wire that these never have hum problems,
so have on occasion resorted to disconnecting this on Linn
arms.
My plinth is custom made from Yew, not sure about the sound (or the PC aspect) but it looks gorgeous.
Happy listening.
Rgds Simon
If you are happy to go inside the deck, I would disconnect the short earth cable from the armbase to the sub-chassis.
I would hazard a guess that this would cure your hum problem.
The chassis is earthed thru the psu and the arm cable will be earthed at the phonostage.
I've had a few instances (with Linn arms)where disconnecting the short loop to the sub-chassis has cured hum problems - worth a try.
Why this set up sometimes causes a ground loop defeats me but I know from using lots of non -Linn arms which don't have the short extra wire that these never have hum problems,
so have on occasion resorted to disconnecting this on Linn
arms.
My plinth is custom made from Yew, not sure about the sound (or the PC aspect) but it looks gorgeous.
Happy listening.
Rgds Simon

