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(1) Tested Very Strong Sylvania 12DQ6B Tube Date Code ha DDZ 12DQ6 B Power Tube

(1) Tested Very Strong Sylvania 12DQ6B Tube Date Code ha DDZ 12DQ6 B Power Tube

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(1) Tested Very Strong Sylvania 12DQ6B Tube.
Date Code ha DDZ.

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

Gm Test = 8375 micromhos
Minimum pass/good = 3800

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