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Classic Currents

(1) Tested RCA 12C8 Tube Code 59-39 Twin Diode Cutoff Pentode Tube (a)

(1) Tested RCA 12C8 Tube Code 59-39 Twin Diode Cutoff Pentode Tube (a)

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(1) Tested RCA 12C8 Tube.
Date Code 59-39.

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

Gm Test = 1400 micromhos
Minimum pass/good = 725
Each diode section tests at 1100-1300 where 800-800 is minimum pass/good.

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