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In Reply to: Fed up with old stock 12AX7 RCAs dying or becoming microphonic! posted by Paul Kehayas on December 20, 2016 at 13:11:36:
I think I know the dealer your referring too. His definition of "used, test excellent" and mine differ significantly.
I have many pairs of RCA long black plates. They are one of my favourites. I have never had a pair die or become microphonic. I'm sure it happens eventually, but if it happens to you regularly with tubes you get from this dealer than you are not get quality tubes.
Don't blame it on RCA.
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Follow Ups
- "Cosmetically challenged"? - Mendel 14:20:23 12/23/16 (0)