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RE: Fed up with old stock 12AX7 RCAs dying or becoming microphonic!

are you talking about the GL B759? I'm using them in my Sherwood and they sound every bit as good as my RCA long black plates.

If you're popping tubes you have an electronics issue going on there. I had a PAS preamp where a voltage regulator on the power supply board would go (like clock work I might add) and take out an expensive vintage NOS 12AX7. And like you they were vintage hard to get tubes - and now they're gone!!!


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