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

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

In Reply to: RE: Question on testing 12AX7s - gm vs. mA posted by PeterI on April 14, 2017 at 15:17:15:

"... 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'
Have Fun and Enjoy the Music
"Still Working the Problem"

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Follow Ups Full Thread

Topic - Question on testing 12AX7s - gm vs. mA - PeterI 09:32:39 04/05/17 (6)

RE: Question on testing 12AX7s - gm vs. mA - JazzDude 07:55:23 04/08/17 (2)

RE: Question on testing 12AX7s - gm vs. mA - PeterI 15:17:15 04/14/17 (1)

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

RE: Question on testing 12AX7s - gm vs. mA - Tre' 16:25:08 04/05/17 (2)

RE: Question on testing 12AX7s - gm vs. mA 539C - PeterI 08:35:13 04/06/17 (1)

RE: Question on testing 12AX7s - gm vs. mA 539C. The sound test and Gm. - Mechans 11:18:49 04/08/17 (0)

Follow Ups

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

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