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(1) Tested GE 6BU8 Tube Red Letters with Box Date Code 63-22 Twin Pentode Tube

(1) Tested GE 6BU8 Tube Red Letters with Box Date Code 63-22 Twin Pentode Tube

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(1) Tested GE 6BU8 Tube with Original Box.
Date Code 63-22. Red Letters.

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

Gm Test = 1325-1100 micromhos
Minimum pass/good = 820-820

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