Page 1 of 1

AP76 hum. Possible iffy headshell contacts.

Posted: 28 May 2019 16:30
by sten1969
Hi all,

I've posted previously regarding a hum when using my AP76. I had some very useful earthing tips from the group which lessened the problem quite considerably. The problem seems to have returned with a vengeance though. On checking the sliding headshell contacts I've now noticed that one of them is pretty much down to the copper underneath with the silver plating nearly completely worn. A further contact isn't much better. Would I be right in thinking this could well add to the problem? Is there a way to try to remedy this? Many thanks.

Re: AP76 hum. Possible iffy headshell contacts.

Posted: 28 May 2019 18:10
by lenjack
I don't think the contact being silver or copper would make the slightest difference with respect to your issue.

Re: AP76 hum. Possible iffy headshell contacts.

Posted: 02 Jun 2019 12:56
by DSJR
The headshell 'wipers' need to be straight down as viewed from the front and not tilted or bent over slightly, otherwise they will be lifted by the plastic between the strips on the carrier (I can't explain it better). It's a common issue.

Be very careful with the 'wipers' here. If you're gentle with them, it should be possible to fully sort - my own AP76 has had issues like this on occasion but it's ok right now...

Re: AP76 hum. Possible iffy headshell contacts.

Posted: 02 Jun 2019 16:51
by lenjack
They would need to be quite a bit off to be a problem.