(1) Tested GE 6BL7GTA Tube with Original Box.
Date Code 58-52.
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 = 6625-6750 micromhos
Minimum pass/good = 3150-3150
NOS rating = 4725-4725
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