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(1) Tested RCA 12SJ7 Tube with Box Date Code MC RCA Sharp Pentode Vacuum Tube

(1) Tested RCA 12SJ7 Tube with Box Date Code MC RCA Sharp Pentode Vacuum Tube

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(1) Tested RCA 12SJ7 Tube with Original Box.
Date Code MC.

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

Gm Test = 1750 micromhos
Minimum pass/good = 1050

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