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(1) Tested Sylvania 3GK5 Tube with Box Date Code gb AKP High Mu Triode Tube

(1) Tested Sylvania 3GK5 Tube with Box Date Code gb AKP High Mu Triode Tube

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(1) Tested Sylvania 3GK5 Tube with Original Box.
Date Code gb AKP.

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

Gm Test = 9125 micromhos
Minimum pass/good = 6000

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