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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Replace 12ax7 with 12at7 posted by pegwill on March 31, 2012 at 05:18:39:
A 12AX7 is usually set up with about 1ma of plate current. The 12AT7 should use 3-10ma. Thus with the stock 12AX7 plate & cathode resistors the 12AT7 plate voltage will drop perhaps as low as 60 volts or in a less linear part of the plate curves.
Does direct drop-in work? Yes. However, a better drop-in 12AX7 type tube with lower gain is a 5751 (70 vs 100).
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- RE: Replace 12ax7 with 12at7 - Neff 07:34:16 03/31/12 (0)
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