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Classic Currents

(1) Tested 1960 Sylvania 12BQ6GTA Tube Code GA MFK 12BQ6 GTA Beam Power Tube

(1) Tested 1960 Sylvania 12BQ6GTA Tube Code GA MFK 12BQ6 GTA Beam Power Tube

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(1) Tested Very Strong Sylvania 12BQ6GTA Tube.
Date Code GA MFK (January of 1960).

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

Gm Test = 5500 micromhos
Minimum pass/good = 2800

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