Try this

Try this

Posted by Barry (A) on January 31, 2016 at 09:11:19

In Reply to: RE: Excellent answer posted by mondial on January 30, 2016 at 17:41:53:

AT1000 Standard tube warm up time counts down from 60 seconds. You'll get fairly consistent readings with a three minute warm up. Note both these tubes are dual section triodes, two section tubes in one device, so the AT will prompt you for the second set of measurements on the readout when you're done with testing the first section. You test/ match both sections for Mu and gm regardless of what tester you are using.

Check out this site for tube matching and testing triodes as this really is very basic and helpful. Mu or gain is what the AT incorrectly calls emissions.

http://www.tubeaudiostore.com/tubmatdem.html

Despite all the technical stuff, you care about two readings, Mu & gm. If the separate readings for both sections of tubes and with other tubes match to within 10 % or so and the percentage of both readings is not much less than 80% of specification, you will be fine.

Alternatively rerun the tests with proper warmup time for both tubes sections for all your tubes in fixed bias mode post them and let the group tell you if they're ok.

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Follow Ups Full Thread

Topic - 6NIP & 6H30Interpretation of tube test results. - mondial 21:41:09 01/29/16 (21)

Interpreting Amplitrex AT1000 tube tester results - JazzDude 10:36:52 01/30/16 (2)

RE: Interpreting Amplitrex AT1000 tube tester results - mondial 13:22:31 01/30/16 (1)

RE: Interpreting Amplitrex AT1000 tube tester results - JazzDude 16:15:31 01/30/16 (0)

RE: 6NIP & 6H30Interpretation of tube test results. - Caucasian Blackplate 10:03:00 01/30/16 (13)

RE: 6NIP & 6H30Interpretation of tube test results. - Jim McShane 15:35:24 01/30/16 (8)

RE: 6NIP & 6H30Interpretation of tube test results. - c1ferrari 16:41:40 02/19/16 (0)

RE: 6NIP & 6H30Interpretation of tube test results. - Caucasian Blackplate 19:29:01 01/30/16 (0)

Excellent answer - Barry 16:08:15 01/30/16 (5)

RE: Excellent answer - mondial 17:41:53 01/30/16 (4)

Try this - Barry 01/31/1609:11:19 01/31/16 (3)

RE: Try this - mondial 15:05:31 01/31/16 (2)

Well - Barry 13:12:47 02/1/16 (1)

RE: Well - mondial 14:31:41 02/1/16 (0)

RE: 6NIP & 6H30Interpretation of tube test results. - mondial 13:17:44 01/30/16 (3)

RE: 6NIP & 6H30Interpretation of tube test results. - Dave Pogue 05:50:23 02/1/16 (2)

RE: 6NIP & 6H30Interpretation of tube test results. - mondial 11:44:55 02/1/16 (1)

RE: 6NIP & 6H30Interpretation of tube test results. - Dave Pogue 11:57:23 02/1/16 (0)

RE: 6NIP & 6H30Interpretation of tube test results. - c1ferrari 07:54:04 01/30/16 (0)

RE: 6NIP & 6H30Interpretation of tube test results. - tubular.well 01:02:37 01/30/16 (1)

RE: 6NIP & 6H30Interpretation of tube test results. - mondial 13:34:38 01/30/16 (0)

RE: 6NIP & 6H30Interpretation of tube test results. - mondial 23:56:38 01/29/16 (0)

Follow Ups

Try this - Barry 01/31/1609:11:19 01/31/16 (3)

RE: Try this - mondial 15:05:31 01/31/16 (2)

Well - Barry 13:12:47 02/1/16 (1)

RE: Well - mondial 14:31:41 02/1/16 (0)

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