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(1) Tested RCA 12K8 Tube Date Code 109 Black Metal Triode Hexode Converter Tube

(1) Tested RCA 12K8 Tube Date Code 109 Black Metal Triode Hexode Converter Tube

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(1) Tested RCA 12K8 Tube.
Date Code 109.

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

Gm Test = 825-2125 micromhos
Minimum pass/good = 630-1500

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