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(1) Tested 1965 Sylvania 6BQ7A Tube with Box Date Code 6513 Mil Spec Twin Triode

(1) Tested 1965 Sylvania 6BQ7A Tube with Box Date Code 6513 Mil Spec Twin Triode

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(1) Tested 1965 Sylvania 6BQ7A Tube with Original Box.
Date Code 6513.

The box has a packaged date of 1-65 (January, 1965).

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

Gm Test = 7375-7250 micromhos
Minimum pass/good = 4000-4000

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