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In Reply to: RE: strange behavior of Belvu and S&H 5751 tubes in my EICO ST84 preamp posted by DAK on July 03, 2017 at 14:36:40
I think you have socket issues in addition to a bad tube or two. If a dual triode has a channel out in one socket, but both channels work in another, the socket is almost certainly the culprit.
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Follow Ups:
after putting different tubes in the socket and they worked ok. Maybe i will just change out the socket anyway. I checked all the connections to the socket, looked really close for carbon or solder traces that might be causing problems. Everything looks ok.
Why do you suppose the Belvu tube hums? but tests ok and also works without humming as a driver tube? I have not run across such an issue with a tube.
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