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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: What would make one output tube go bright cherry red!! too much drama posted by henrybasstardo on November 30, 2006 at 22:09:27:
Some tubes have voltage sensitive cathodes that will not maintain a correct bias and will quickly fail. Most likely it was simply a crappy tube. However, it's always a good idea to slowly bring new tubes up to the correct bias over a brief period to keep from running them too hot right out of the box. If your amp has manual bias adjustments and the tubes you were replacing have needed increases in negative bias, then the newer tubes were probably biased too hot...or at least that's a thought.
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- Re: What would make one output tube go bright cherry red!! too much drama - Catch22 20:28:09 12/01/06 (0)
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