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Classic Currents

(1) Tested National Union 19C8 Tube Date Code 5139 Triple Diode Triode Tube

(1) Tested National Union 19C8 Tube Date Code 5139 Triple Diode Triode Tube

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(1) Tested National Union 19C8 Tube.
Date Code 5139.

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

Gm Test = 1250 micromhos
Minimum pass/good = 790
Each diode section tests at 1275-1275-1250 where 800-800-800 is minimum pass/good.

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