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Audible Illusion 3A humming pop noise one channel

I thought I had a ground loop problem but everthing keeps pointing back to the Pre Amp. With volume turned down you can hear a slight hum in one speaker. When that volume control is adjusted you get a click or small pop for each adjustment. Also the power box has always had a slight hum to it which I understand others have reported this also. Any ideas what it could be, and could a local tech in the Raleigh area take a look or would it need to go back to factory?
mike8622

Showing 1 response by stereo5

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stereo5
6,248 posts
 
I wouldn't use any cleaner on it. The volume control is made of all resistors. I had that same problem and it turned out the muting switch was dirty. I used a cleaner on the muting switch. It's easy to get to, right under the top cover.

As for the power supply hum. Mine always did and still does. I put a Magic Brick on it and it took away all the hum. The 3 and 3a power supplies did indeed hum. I had both.

Bob
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