Got a TD-160 with its std TP-15 which had a light buzzy noise prob, earth-like it seemed to me. I decided to try a rewire, with std litz stuff and all is fine BUT for a similar (tho not exactly the same- it ceases mostly when needle on lp/ odd) earth issue. More irritating than anything, as only faintly aware of it thru spkrs once lp playing.
Any ideas? Afai remember when I did it last year, the ground litz wire goes from the cartridge 4th pin all way down thru arm to a lug underside of TT. The mains plug, whether related or not, is an old 2-wire L/N affair ie has no ground at all: don't suppose this has anything to do with the prob?