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(1) Tested Sylvania 6CU8 Tube and Box Code am YAD Triode Pentode Vacuum Tube (b)

(1) Tested Sylvania 6CU8 Tube and Box Code am YAD Triode Pentode Vacuum Tube (b)

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(1) Tested Sylvania 6CU8 Tube with Original Box.
Date Code am YAD.

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

Gm Test = 5250-4200 micromhos
Minimum pass/good = 3900-2100

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