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(1) Tested Westinghouse 12SK7 Tube Date Code 5R13 12SK7 Pentode Metal Tube

(1) Tested Westinghouse 12SK7 Tube Date Code 5R13 12SK7 Pentode Metal Tube

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(1) Tested Westinghouse 12SK7 Tube.
Date Code 5R13.

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

Gm Test = 2000 micromhos
Minimum pass/good = 1260

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