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(1) Tested GE 6BL7GTA Tube with Box Date Code 58-52 General Electric 6BL7 GTA

(1) Tested GE 6BL7GTA Tube with Box Date Code 58-52 General Electric 6BL7 GTA

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(1) Tested GE 6BL7GTA Tube with Original Box.
Date Code 58-52.

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

Gm Test = 6625-6750 micromhos
Minimum pass/good = 3150-3150

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