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(1) Tested National Union 7AD7 Tube Code 5113 Power Pentode Vacuum Tube (b)

(1) Tested National Union 7AD7 Tube Code 5113 Power Pentode Vacuum Tube (b)

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(1) Tested National Union 7AD7 Tube.
Date Code 5113. 

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

Gm Test = 6625 micromhos
Minimum pass/good = 3900

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