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Classic Currents

(1) Tested 1955 Sylvania 6SN7GTB Tube Black Angled T Plates Date Code BK 6SN7GT

(1) Tested 1955 Sylvania 6SN7GTB Tube Black Angled T Plates Date Code BK 6SN7GT

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(1) Tested Sylvania 6SN7GTB Tube.
Date Code BK (October of 1955).

Chrome Dome flashing with black angled T plates.

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

Gm Test = 2375-2750 micromhos
Minimum pass/good = 1650-1650

Also performance tested in-circuit through a Class A amplifier with no microphonics detected.

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