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(1) Tested 1950 Western Electric JW 6AK5 Tube Code 013 Black Plates Pentode

(1) Tested 1950 Western Electric JW 6AK5 Tube Code 013 Black Plates Pentode

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(1) Tested 1950 Western Electric JW-6AK5 Tube.
Date Code 013 which places production to January - March of 1950.

Black plates with a top square D angled getter.

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

Gm Test = 4500 micromhos
Minimum pass/good = 2750

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