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(1) Tested Zenith 6EM5 Tube with Box Great Britain Code 71-30 Beam Power Tube

(1) Tested Zenith 6EM5 Tube with Box Great Britain Code 71-30 Beam Power Tube

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(1) Tested Zenith 6EM5 Tube with Original Box.
Date Code 71-30. Made in Great Britain.

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

Gm Test = 5250 micromhos
Minimum pass/good = 3200

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