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Classic Currents

(1) Tested 1959 Sylvania 6BL7GTA Tube Date Code FG ACL Sylvania 6BL7 GTA Tube

(1) Tested 1959 Sylvania 6BL7GTA Tube Date Code FG ACL Sylvania 6BL7 GTA Tube

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(1) Tested Sylvania 6BL7GTA Tube.
Date Code FG ACL (July, 1959).

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

Gm Test = 6375-6500 micromhos
Minimum pass/good = 3150-3150

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