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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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I am hoping someone more knowledgeable about tubes than I can offer some assistance.
I have a bunch of 6AS7G tubes that I want to test. I will use a Hagerman Vacutrace tube characterizer to test them (see link below, I believe the Vacutrace is discontinued, but I own one).
This tube characterizer is a powerful device for people who know tubes, but it does not have a simple plug and play test for people like me. I believe I need to set the plate voltage with the switch in "hold" mode and set the display to show gp or gm, I'm not sure which. I basically want to measure how much life is left in the tube.
I am wondering if anyone knowledgeable in these tubes may be willing to advise me what I should set the plate voltage to and then whether I should read the gm or gp to measure how much tube life is left? How would I know what number to compare it to, I.e. what would a new tube with full life measure, and what is the minimum acceptable measurement?
I can also trace the curves on a digital oscilloscope, but I'm not well trained in reading the traces. I could be completely off base here, vacuum tubes are not my area of expertise.
Any assistance appreciated.
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Topic - 6AS7G tube testing settings and readings - johnax1 11:29:34 02/03/23 (2)
- 120-140Volts should get you in the ballpark. - Ralph 12:17:29 02/09/23 (1)
- RE: 120-140Volts should get you in the ballpark. - johnax 12:29:29 02/12/23 (0)
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