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(1) Tested RCA 6CN7 Tube with Box Date Code AD Twin Diode Triode Vacuum Tube

(1) Tested RCA 6CN7 Tube with Box Date Code AD Twin Diode Triode Vacuum Tube

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(1) Tested RCA 6CN7 Tube with Original Box.
Date Code AD.

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

Gm Test = 1350 micromhos
Minimum pass/good = 760
The diode sections test at 1175-1175 where 800-800 is minimum pass/good.

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