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(1) Tested Sylvania 6CU8 Tube Date Code NR DEK Triode Pentode Vacuum Tube

(1) Tested Sylvania 6CU8 Tube Date Code NR DEK Triode Pentode Vacuum Tube

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(1) Tested Sylvania 6CU8 Tube.
Date Code NR DEK.

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

Gm Test = 6250-4500 micromhos
Minimum pass/good = 3900-2100

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