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This might be a dumb question but that's my specialty

If this is stupid question and waste of time I apologize but I am kind of new to the world of vacuum tubes in the last year. My question is if there is a 12ax7 tube that is used and tests low with say approximately 75% of tube life left would that tube then be comparable to a 5751 tube that is testing new? If answer is no could someone explain to me why? Another way to ask this is when people use the 5751 tube to tame some gain in place of the 12ax7 in say the v1 position of a guitar amp what would the effect be if the low testing imaginary 12ax7 tube was used instead of a new 5751 or new fresh 12ax7?

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Topic - This might be a dumb question but that's my specialty - Permanent Waves 14:14:59 01/19/17 (9)


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