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Classic Currents

(1) Tested 1967 Western Electric 404A Tube Black Plates Square Getter Code 6739

(1) Tested 1967 Western Electric 404A Tube Black Plates Square Getter Code 6739

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(1) Tested 1967 Western Electric 404A Tube.
Date Code 6739 places the production to July - September of 1967.

Black plates with a top square D halo getter.

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

Gm Test = 6500 micromhos
Minimum pass/good = 4600

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