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RE: Question on testing 12AX7s - gm vs. mA

"... 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.

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  • RE: Question on testing 12AX7s - gm vs. mA - Tre' 16:19:41 04/14/17 (0)


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