(1) Tested Very Strong GE 6CU5 Tube with Original Box.
Date Code NF.
Gray plate.
This tube tests as NOS.
Tested on a calibrated Hickok TV-10 military tube tester and exhibiting no shorts or leaks with the following results:
Gm Test = 10,500 micromhos
Minimum pass/good = 5650
NOS rating = 8475
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