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(1) Tested GE 6AU6A Tube Date Code 58-13 General Electric 6AU6 A Pentode Tube

(1) Tested GE 6AU6A Tube Date Code 58-13 General Electric 6AU6 A Pentode Tube

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(1) Tested GE 6AU6A Tube.
Date Code 58-13.

The wording is partially worn away but still recognizable as being GE branded.

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

Gm Test = 2875 micromhos
Minimum pass/good = 2050

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