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RE: bias trim pot - sub?

Posted by bdgregory (A) on May 7, 2009 at 19:30:23

In Reply to: bias trim pot - sub? posted by bdgregory on May 6, 2009 at 13:47:36:

for those interested - I found the problem. It isn't the trim pot. There's a dpst switch that changes the output power setting between Full and 1/4 power. One side of that feeds the bias ckt and it had a defect. It was dropping 60Vdc across it. It's a brand new switch too.

So net-net I have the amp up and running now. I still have soem tuning to do, but at least it's getting close. This amp was a mess before I started, so it's come a long way.

Thanks again . . .

This post is made possible by the generous support of people like you and our sponsors:

Herbie's Audio Lab

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