"Don Pearce"


Sorry to reply to my own post, but I have just thought how it could
be. The source of the hum was actually a transverse mechanical
vibration of the platter. While the stylus was skating about on the
flat part of the record it could not be transmitted into the needle -
the vinyl just slid around under the stylus. As soon as it was in the
groove, though, the stylus was grabbed, and any mechanical movement
was sent straight into the it.

Anyway - that's my theory. Anybody got a better one?



** Seen the exact, same phenomenon many times.

Vinyl recordings do all seem to have grooves for a reason.





........ Phil