Nap500 speker socket clean

[Ebor]

There was also this thread a couple of years ago, which started on the subject of cleaning DIN sockets, but quickly moved on to 4mm speaker sockets:

Any recommendations for cleaning DIN pins?

Forget cleaning your DIN plugs/sockets - it’s the 4mm speaker outputs/inputs you need to pay attention to. The distortion trace on an oscilloscope has to be seen to been believed when these sockets are dirty. I’ll get some pictures to back up my claim in due coarse. Cleaning these is a gamble, because the best way is to use a cotton bud soaked with isopropanol & the head is liable to come off, leaving you with a headache! For those willing to take the risk - insert the cotton bud first dry,…