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(1) Tested RCA 12BF6 Tube with Box Date Code KH Double Diode Triode Vacuum Tube

(1) Tested RCA 12BF6 Tube with Box Date Code KH Double Diode Triode Vacuum Tube

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(1) Tested RCA 12BF6 Tube with Original Box.
Date Code KH.

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

Gm Test = 2050 micromhos
Minimum pass/good = 1200
Each diode section tests at 1300-1200 where 800-800 is minimum pass/good.

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