(1) Tested Very Strong GE 6DN6 Tube.
Date Code MU.
The number is worn away from the glass - see photos.
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 = 10,750 micromhos
Minimum pass/good = 5650
NOS rating = 8475
~ Please view all 4 photos ~
