Thread: 12at7 or 12au7
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  #5  
Old 08-10-2016, 08:37 PM
Olorin67 Olorin67 is offline
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Join Date: Feb 2014
Location: Milwaukee
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A 12au7 has a gain of 20, 12AT7 is 70, very different tubes. Surprising it works at all with the wrong one. 12ax7 is closer to the AT7, with a gain of 100.
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