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If the tube is coming up after being on for awhile, it may be better to rejuvinate it with a good tester/rejuvinator, or at least check it with one. If the tube will track and cut off correctly those are good signs for either a successful rejuvination or leaving as it is now. I shy away from brightners if at all possible but as a last gasp of operation to an otherwise un-savable tube then that may be your only choice. But don't use one and take away any salvagable life/longevity your tube may have.
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09-11-2010, 01:03 PM
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