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(1) Tested RCA 50B5 Tube with Box Date Code MZ Beam Power Vacuum Tube

(1) Tested RCA 50B5 Tube with Box Date Code MZ Beam Power Vacuum Tube

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(1) Tested RCA 50B5 Tube with Original Box.
Date Code MZ.

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

Gm Test = 8000 micromhos
Minimum pass/good = 5650

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