|
Tubes Asylum Questions about tubes and gear that glows. FAQ |
|
|
|
Tubes Asylum Questions about tubes and gear that glows. FAQ |
|
In Reply to: RE: Well for one I would not use an emissions tester. . . posted by nick-seattle on June 15, 2012 at 21:25:56:
...Although it should be a gradual phenomenon, not intermittent. I've experienced this with the 12AX7LPS. Another possibility is that the tester is oscillating under certain conditions. This is a lot more likely with hi gm tubes like 6550 and almost impossible with something like a 12AX7. One check is to put your hand over the tube while under test. If it's oscillating, the reading will jump around a lot while you do this. Hickok got around this tendency by using ferrite beads on all socket leads on their later testers. Another point to keep in mind is that a lot of Hickok testers way overdrive hi gain tubes like the X7 while under test. Only the best versions use an appropriate 0.25 or 0.5VAC as the test signal.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Yes, a "burn-in" of sorts is plausible... - Steve O 21:58:17 06/15/12 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
