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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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In Reply to: Tube hiss .and/or alignment? posted by ltman on March 11, 2024 at 11:45:28:
...it's good that you have a quiet one for comparison.
I would take all the tubes out of the 'hissy' unit, and carefully insert the tubes from the quiet one. If the hiss is gone, then you know it's a tube, and you can replace them one by one (with the FM-3 off, of course) until you find the culprit.
If it's not the tubes, then you'll have to use a scope, or, if you don't have one, then I'd start replacing resistors. Take note of paragraphs two and three above though, since you're working with RF equipment. The above may not apply, but I thought I'd include it.
Good luck.
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Follow Ups
- As Triode_Kingdom said... - 1973shovel 14:13:33 03/12/24 (1)
- RE: As Triode_Kingdom said... - ltman 14:23:46 03/12/24 (0)
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