While contemplating this problem it suddenly dawned on me that my Granite Audio CD player has a volume control! So I ran my interconnects directly from my amp to the cd player and voile', no more hum, no more FM interference. This now tells me that the problem is with the preamp, probably the inputs. This now becomes a question of solving the problem of my interim preamp being an unwitting antenna and how can I eliminate that. Any suggestions on this new issue would be greatly appreciated. Any vintage Marantz fans out there who have remedied this situation in the past?
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