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Classic Currents

(1) Tested 1950 Sylvania 12SJ7 Tube Code 0-39 Sylvania Green Logo Pentode Tube

(1) Tested 1950 Sylvania 12SJ7 Tube Code 0-39 Sylvania Green Logo Pentode Tube

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(1) Tested Sylvania 12SJ7 Tube.
Date Code 0-39 (39th week of 1950).

Scattered small areas of paint loss and wear - see photos.

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 = 1050

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