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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:
It would be a good idea to have the tubes tested for transconductance. Also, did you get test values when you bought the tubes? That would be a clue as to expected lifetime.
Also, how long were they in use before they "died"?
Do you know if the tech checked for coupling cap leakage in both of your pieces of gear?
Steve M.
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Follow Ups
- RE: Fed up with old stock 12AX7 RCAs dying or becoming microphonic! - Steve M. 12/21/1604:29:04 12/21/16 (1)
- RE: Fed up with old stock 12AX7 RCAs dying or becoming microphonic! - Paul Kehayas 06:13:10 12/21/16 (0)