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(1) Tested Sylvania 6T8A Tube Date Code ab ESO Triple Diode High Mu Triode Tube

(1) Tested Sylvania 6T8A Tube Date Code ab ESO Triple Diode High Mu Triode Tube

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(1) Tested Sylvania 6T8A Tube.
Date Code ab ESO.

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

Gm Test = 1025 micromhos
Minimum pass/good = 760
All three diode sections test at 1175, 1175 and 1175 where 800 is minimum pass/good.

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