[Panrock]

As I mentioned in a previous thread, these tapes had been appallingly badly stored, and were discovered in the loft after being neglected for decades - exposed to heat and cold and covered with grit. I then cleaned them up - and they still play (!) though the audio quality of some of them is a little muddy. Others are surprisingly good.

On the very worst stretches (at the outside of the tape) I've noticed a weird effect whereby the tracks previously recorded over can still be heard under the newer tracks. It's as if their erasing left something behind that 'rose again' later. Is this a recognised phenomenon?

One other question. If it's not allowed to test heads with a meter for continuity, what is the correct way to test them?

Steve