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RE: Are There Any Issues Using 12au7 in Place of 12ax7s?

Well, as Tre points out there could be a problem if the heater windings are being stressed by the extra current draw - depends on how much the transformer is over specified. One thing you could do is place your hand on the power transformer after its been running for awhile and see if it is comfortable or too hot to touch. If the latter, you could be stressing the transformer which would shorten its life. Things don't always go bad immediately.


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  • RE: Are There Any Issues Using 12au7 in Place of 12ax7s? - JimL 19:34:34 04/03/16 (0)

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