Phonoland

I have read elsewhere that connecting filter caps and the transformer ground to the same ground buss can result in increased hum due to an effect on the pre-amp stage. Should the transformer (T1) ground or any of the filter cap (C1-C3) grounds have separate ground points when replacing caps in the MRA5 amp? What would be the basis for the concern of increased hum if these grounds are all on a common buss?

Steve,
I have never had an problems with this--just hook the new caps up egg-zactly the same, electrically, as were the old ones.
Use caution on the "Hum Control". Clean it only with a "safety solvent", then treat it with Deoxit--or, Do not TOUCH ("adjust") it at all ( they tend to catch fire when "adjustments" are made when they are dirty--On this control, if it still won't eliminate hum, remove the ground, and use a larger wire to attach it to the transformer grounding lug. Ron Rich