Quote:
Originally Posted by G6ONEDave
Not had that particular issue but would be looking carefully at the felt pressure pads. Maybe they have gone hard or got some foreign matter in them. Also the capstan shaft for excessive wear.
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No pressure pads of any sort on the 4000.
From a quick inspection the Capstan shaft (large diameter) has some normal wear, but not excessive.
Looks like only 2 items are making contact with the back of the tape:-
1. Of course the Pinch Wheel, looks in OK condition.
2. The vertical side edges of the metal hum flap that is pushed towards the PB head in Play mode. Need to do some tests to conclusively prove but now am strongly thinking that the hum flap is the most likely culprit. If so then this means that machines with this type of hum flap may not be compatible with back coated tape usage.
David