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(1) Tested Raytheon Uniline 6CB6A Tube with Box Date Code M22 Pentode Tube

(1) Tested Raytheon Uniline 6CB6A Tube with Box Date Code M22 Pentode Tube

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(1) Tested Raytheon Uniline 6CB6A Tube with Original Box.
Date Code M22.

The box shows some light denting and creasing on one panel.

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

Gm Test = 4500 micromhos
Minimum pass/good = 3500

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