[A.N. Beal]

Dear Richard,
Thanks for the suggestions. I don't use a preamp (other than a phono preamp, which is permanently switched on) and the hiss only occurs when I switch the WD88 off, so I assume that is where the problem is. When I find time to work on it (probably in a fortnight or so) I'll try your suggestions to localise the fault and then poke around with my favoured tool (a plastic chopstick) to try to find the offending joint.
Regards,
Alasdair