(1) Tested RCA Cunningham Type 41 Engraved Base Tube.
Date Code J12.
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 = 1750 micromhos
Minimum pass/good = 1000
NOS Target Value = 1500
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