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(1) Tested Dumont 6S4A Tube Date Code 61-26 Medium Mu Triode Tube

(1) Tested Dumont 6S4A Tube Date Code 61-26 Medium Mu Triode Tube

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(1) Tested Dumont 6S4A Tube.
Date Code 61-26.

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

Gm Test = 4800 micromhos
Minimum pass/good = 2600

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