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Classic Currents

(1) Tested Philco Starlight 4BQ7A Tube with Box Code 6531 4BQ7 A Twin Triode

(1) Tested Philco Starlight 4BQ7A Tube with Box Code 6531 4BQ7 A Twin Triode

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(1) Tested Philco Starlight 4BQ7A Tube with Original Box.
Date Code 6531.

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

Gm Test = 6125-5875 micromhos
Minimum pass/good = 4000-4000

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