Just got in possession of a Diatone Idler Drive Tt with Mitsubishi sld5500 cart ( a hand me down from a friend who is migrating to Canada)....Listening to it I noticed a strange sound specially during quiet passages and in between the record tracks which is very faint and sounds like a bulldozer on an asphalt road (I can hear it only when I put my ears near the speakers). Any one know the origin of this sound? How to eliminate? TIA