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(1) Tested Sylvania 6JH6 Tube with Box Date Code al ADO Pentode Vacuum Tube

(1) Tested Sylvania 6JH6 Tube with Box Date Code al ADO Pentode Vacuum Tube

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(1) Tested Sylvania 6JH6 Tube with Original Box.
Date Code al ADO.

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

Gm Test = 4750 micromhos
Minimum pass/good = 3400

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