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(1) Tested GE 12AV7 Tube Date Code 55-48 Black Plates Round Halo Getter Triode

(1) Tested GE 12AV7 Tube Date Code 55-48 Black Plates Round Halo Getter Triode

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(1) Tested GE 12AV7 Tube.
Date Code 55-48.

Black plates with a round halo getter.

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

Gm Test = 4500-4250 micromhos
Minimum pass/good = 2580-2580

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