Quote:
Originally Posted by Ed in Tx
Most of the noise is at the top of the pic so that's the entry side of the tape to the head drum. Could be alignment, but if the entry and exit guide rollers are secure probably not. Or could be the back-tension band has worn out, the felt liner fell off the tension band or somesuch, seen that happen many times. Or maybe the tension spring that hooks onto the back-tension arm came off. Should be 20-30 grams of back-tension on the tape in play mode, measured with a Tentelometer. Without proper back-tension the tape will not be in good contact with the heads.
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This is the golden answer. I have read up on this topic now, and as you say, the back tension is the cause. The band has simply snapped. Is this made of common materials so I can attempt to recreate one? I don't have a tentelometer, but I read about a trick with v-hold to align image on top and below the blanking section which would probably be good enough for this sparingly used deck.