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Classic Currents

(1) Tested Balanced RCA 6SN7GTB Tube Coin Base Black Plates Code GL APG 6SN7GT

(1) Tested Balanced RCA 6SN7GTB Tube Coin Base Black Plates Code GL APG 6SN7GT

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(1) Tested Balanced RCA 6SN7GTB Coin Base Tube.
Date Code GL APG.

Balanced mutual conductance (Gm) with a coin based style envelope and a top round foil getter 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 = 2875-2875 micromhos
Minimum pass/good = 1650-1650

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

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