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Original Message
RE: Question on testing 12AX7s - gm vs. mA
Posted by Tre' on April 14, 2017 at 16:19:41:
"... if the 12AX7 pulls half of new mA at these standard 539C settings? "Half of new" sounds like "bad", regardless of gm over 1100. :)>
You would need to change the cathode resistor to bias the tube back up before making a judgement call on the sound.
Tre'