(1) Tested National Union 7AD7 Tube with Original Box.
Date Code 5113.
The box shares the same date code as the tube so that you know it's truly original.
This tube tests above NOS specs.
Tested on a calibrated Hickok TV-10 military tube tester and exhibiting no shorts or leaks with the following results:
Test Result = 6750 micromhos
Minimum pass/good = 3900
NOS Target Value = 5850
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