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In Reply to: RE: Are There Any Issues Using 12au7 in Place of 12ax7s? posted by Tre' on April 03, 2016 at 11:09:37
surely no problem - the amp ist running for months now this way!
any problems should have become manifest right from the start but didnīt.
:))
The times, they are changing...
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If it were me I'd be looking to find out the current limits on the filament winding.
The effects of over heating can take a while.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
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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