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Questions about tubes and gear that glows. FAQ

RE: Sounds like you have a micrphonic tube.

When the Tube squealed I turned the preamp off. When I turned it back on, it was silent. I didnt swap channels, but to be on the safe side, I pulled both tubes out and replaced them with the orignal tubes. The orignal tubes are playing just fine. Not sure what happened to be honest. I will be ordering another set of fresh tubes soon. I'm going to be monitoring the new set by utilizing the hour counter in my power amp as reference. I'm going to change them out at 3.5 k hours like clock work. I don't want to take chances at hurting the circuit.


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