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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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I have very strange issues with testing NOS tubes. I have two tester: Hickok 6000A and Heathkit it-3117. I take a NOS 12ax7 tube and test it in Hickok - depending on the time of the day and lunar phase it shows that the tubes is strong or really weak. It's unpredictable. Then I test it in Heathkit (emissions only) the tube is always at 100% of emissions (I calibrate it every time by adjusting the scale to 100% by using a know NOS tube). Is that a know issue with Hickok? I know that they read low for 12ax7, but randomly???
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Topic - Tester issues - nick-seattle 17:27:43 06/15/12 (12)
- Emissions test tells you almost nothing - Jay Buridan 12:05:30 06/17/12 (1)
- If it tests bad on an emission tester, it's bad - Alpha Al 04:39:33 06/18/12 (0)
- RE: Tester issues - tubos 16:26:58 06/16/12 (0)
- Don't overlook loose socket contacts in the Hickok... - Steve O 20:16:46 06/15/12 (0)
- Well for one I would not use an emissions tester. . . - John PA 17:49:39 06/15/12 (7)
- RE: Well for one I would not use an emissions tester. . . - nick-seattle 21:15:20 06/15/12 (6)
- RE: Well for one I would not use an emissions tester. . . - nick-seattle 21:25:56 06/15/12 (5)
- RE: Well for one I would not use an emissions tester. . . - Jim McShane 13:42:37 06/18/12 (3)
- RE: Well for one I would not use an emissions tester. . . - nick-seattle 13:46:47 06/18/12 (2)
- RE: Well for one I would not use an emissions tester. . . - Jim McShane 14:54:37 06/18/12 (1)
- RE: Well for one I would not use an emissions tester. . . - nick-seattle 15:01:06 06/18/12 (0)
- Yes, a "burn-in" of sorts is plausible... - Steve O 21:58:17 06/15/12 (0)
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