"Dave Plowman (News)" wrote in message
...
In article ,
Arny Krueger wrote:
Only listened to it on the computer speakers. The mains
hum is the obvious thing.

The 100 Hz hum is only present when the needle is actually in the groove.

Yes - definitely shown by the new clip. I've got no theories - have you?
Any muting circuit at start or end of disc would remove the out of groove
surface noise too...


Muting circuit...?? (Debut...??)

Pretty obvous it's the cart and/or the wires to the cart, I would have
thought. The OP needs to try another another one or at least remove the one
he's got and try re-fitting it...