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

Jim
I find that same thing with my RCA black plate 12AX7s.For some reason,my Raytheon black plates don't seem to have as much of an issue with microphonics on the 12AX7s.
They RCAs really do sound nice tho and I still keep them for amp drivers as they don't expose it so much like they do in a preamp.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken


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