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(1) Tested CBS 6BL7GT Tube Date Code EF 6BL7 GT Tube Twin Triode Tube

(1) Tested CBS 6BL7GT Tube Date Code EF 6BL7 GT Tube Twin Triode Tube

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(1) Tested CBS 6BL7GT Tube.
Date Code EF.

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

Gm Test = 5250-5125 micromhos
Minimum pass/good = 3150-3150

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