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(1) Tested Strong Hytron 12SA7GT Tube Date Code 9-39 12SA7 GT Converter Tube

(1) Tested Strong Hytron 12SA7GT Tube Date Code 9-39 12SA7 GT Converter Tube

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(1) Tested Strong Hytron 12SA7GT Tube.
Date Code 9-39.

The wording is faded but still legible.

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

Gm Test = 725-825 micromhos
Minimum pass/good = 470-470

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