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(1) Tested Strong RCA 6BK5 Tube with Box Date Code AY Beam Power Vacuum Tube

(1) Tested Strong RCA 6BK5 Tube with Box Date Code AY Beam Power Vacuum Tube

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(1) Tested Strong RCA 6BK5 Tube with Original Box.
Date Code AY.

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

Gm Test = 6000 micromhos
Minimum pass/good = 3450

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