Thanks for the replies. I went ahead and removed the ground tab from the green (right ground) pin, and it solved the problem. It seems this tab was causing a ground loop with the well grounded tonearm. No SUT was used for the LOMCs as the Aleph ONO has plenty of gain. I dont think I have seen a MC with a ground tab, and it has been so long since I used a MM, I was not sure this was the problem. I had rewired my Alphason tonearm with shielded Cardas 4X33 awg litz. The sheild is grounded within the someam base and I still have a ground leads from the base to the TT chasis and to the phono preamp ground connection.
The ungrounded portion of the leads within the tonearm are sheilded by the grounded metal arm, and the leads are effectively acting as balanced (+ & -) even though I am using an rca connection. I used only 1M of cable with a total of 6 pf capacitance.
The ungrounded portion of the leads within the tonearm are sheilded by the grounded metal arm, and the leads are effectively acting as balanced (+ & -) even though I am using an rca connection. I used only 1M of cable with a total of 6 pf capacitance.