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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: RCA 5691 Vacuum Tube posted by tlowe on July 22, 2021 at 10:33:35:
It is quite possible that the discoloration is from the manufacturing process.
The tubes are dual triodes, so a heavy use pattern would most likely show signs of 2 spots instead of one.
Look at the bottom edge of the flashing as it would likely also show signs of heavy discoloration or fading.
Assuming they test to spec (and are triode balanced), I would not be concerned.
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Follow Ups
- RE: RCA 5691 Vacuum Tube - baileyler 05:45:58 07/23/21 (1)
- RE: RCA 5691 Vacuum Tube - tlowe 06:45:09 07/23/21 (0)
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