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(1) Tested Sylvania 6BN4A Tube with Box Red Letters Code db ABT Medium Mu Triode

(1) Tested Sylvania 6BN4A Tube with Box Red Letters Code db ABT Medium Mu Triode

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$8.95 USD
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(1) Tested Sylvania 6BN4A Tube with Original Box.
Date Code db ABT.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts and no leaks with the following results:

Gm Test = 8500 micromhos
Minimum pass/good = 5000

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