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Philips210 · 13th Jan 2018, 11:10 pm

Hi Dave.

I have found there is a degree of background hum present on mictester's circuit which I put down to the fact it was some mains induced interference due to it not being housed in a metal box. Hopefully mictester will read this thread and be able to offer some advice on this.
When I have housed the circuit in a diecast box then hopefully it will be eliminated or at least reduced, we shall see. It is clearly noticeable on quiet passages or where there are breaks between speech.
Seems strange why the SSTRANS circuit should also exhibit that hum problem as well.

Regards
Symon.

13th Jan 2018, 11:10 pm	#56
Philips210 Nonode Join Date: May 2007 Location: Redruth, Cornwall, UK. Posts: 2,579	Re: Another Pantry MW Thing Hi Dave. I have found there is a degree of background hum present on mictester's circuit which I put down to the fact it was some mains induced interference due to it not being housed in a metal box. Hopefully mictester will read this thread and be able to offer some advice on this. When I have housed the circuit in a diecast box then hopefully it will be eliminated or at least reduced, we shall see. It is clearly noticeable on quiet passages or where there are breaks between speech. Seems strange why the SSTRANS circuit should also exhibit that hum problem as well. Regards Symon.