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Classic Currents

(1) Tested 1956 Sylvania 6SN7GTB Tube Black Plates Clear Mica Code CJ 6SN7GT

(1) Tested 1956 Sylvania 6SN7GTB Tube Black Plates Clear Mica Code CJ 6SN7GT

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(1) Tested Sylvania 6SN7GTB Tube.
Date Code CJ (September of 1956).

Chrome Dome flashing with black angled T plates and clear mica spacers.

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

Gm Test = 2625-2500 micromhos
Minimum pass/good = 1650-1650

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

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