Interpreting Amplitrex AT1000 tube tester results

Posted by JazzDude (A) on January 30, 2016 at 10:36:52

In Reply to: 6NIP & 6H30Interpretation of tube test results. posted by mondial on January 29, 2016 at 21:41:09:

Hi Mondial. TC Tubes is one of the best online sources for vacuum tubes. They use a variety of methods and instruments to test tubes including an Amplitrex AT1000 tube tester. Do examine their webpage/white paper titled "Interpreting Amplitrex AT1000 tube tester results."

This paper details and compares the differences between the AT1000's Fixed Bias and Auto Bias test modes. In summary, their concluding statement is "It is my opinion that Fixed Bias mode should be the default mode for evaluating a tube's condition because it provides mA and gm scores at fixed operating voltages for plate, screen, and grid bias."

You mentioned your test results were derived from Auto Bias testing. Per the TC Tubes description of the 2 test modes, re-doing your tests using the AT1000's Fixed Bias mode would provide more a meaningful understanding of the condition of each tube. The results will also be easier to interpret as they will indicate plate current and GM as percentages of what a new tube would measure when tested at DATASHEET PARAMETERS. Do let us know what results!

Interpreting Amplitrex AT1000 results white paper (Open in New Window)

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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 09:11:19 01/31/16 (3)

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

Well - Barry 13:12:47 02/01/16 (1)

RE: Well - mondial 14:31:41 02/01/16 (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 02/01/16 (2)

RE: 6NIP & 6H30Interpretation of tube test results. - mondial 11:44:55 02/01/16 (1)

RE: 6NIP & 6H30Interpretation of tube test results. - Dave Pogue 11:57:23 02/01/16 (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

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)

Interpreting Amplitrex AT1000 tube tester results

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