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Classic Currents

(1) Tested Balanced RCA 6SL7GT Tube Thin Base Black Plates Date Code NK 6SL7 GT

(1) Tested Balanced RCA 6SL7GT Tube Thin Base Black Plates Date Code NK 6SL7 GT

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(1) Tested Balanced RCA 6SL7GT Tube.
Date Code NK.

Balanced mutual conductance (Gm) with a round halo getter and black rounded plates.

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

Gm Test = 1625-1625 micromhos
Minimum pass/good = 1000-1000

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