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Classic Currents

(1) Tested 1956 Sylvania 3BY6 Tube with Box Code CB Pentagrid Amplifier Tube (d)

(1) Tested 1956 Sylvania 3BY6 Tube with Box Code CB Pentagrid Amplifier Tube (d)

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(1) Tested Sylvania 3BY6 Tube with Original Box.
Date Code CB (February of 1956).

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

Gm Test = 1200-550 micromhos
Minimum pass/good = 750-315

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