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Classic Currents

(1) Tested 1951 Western Electric JW 6AS6 409A Tube Code 139 Dual Control Pentode

(1) Tested 1951 Western Electric JW 6AS6 409A Tube Code 139 Dual Control Pentode

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(1) Tested 1951 Western Electric JW 6AS6 409A Tube.
Joint Army/Navy (JW) mil-spec tube.

Date Code 139 which places the production of this tube to July - September of 1951.

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

Gm Test = 2000 micromhos
Minimum pass/good = 1540

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