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RE: Vintage amp hum

Posted by Brian Levy (A) on January 6, 2015 at 06:45:40

In Reply to: Vintage amp hum posted by filedog on January 5, 2015 at 17:01:26:

If the switch you call mute is the same as the Direct switch on the CA610II in that it basses the tone amp, it may be the culprit. My 610 had a similar illness and I finally traced it there. The prior own likely never used it. I do. It's a dog clean and took repeated hits over a month before it permanently, I hope, stopped. I was at the point of pulling the board and desoldering the switch.

You may also want to contact Merrylander on audiokarma.com. He is a resident guru on Yamaha. Before retiring from the bench he would buy refurb and sell them at a loss it seemed but made it up in volume. He also made beautiful cabinets.
Don Brian Levy, J.D.
Toronto ON Canada

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