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(1) Tested 1960 Sylvania 5X8 Tube Date Code GL ELM Triode Pentode Converter Tube

(1) Tested 1960 Sylvania 5X8 Tube Date Code GL ELM Triode Pentode Converter Tube

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(1) Tested Sylvania 5X8 Tube.
Date Code GL ELM (November, 1960).

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

Gm Test = 4250-6875 micromhos
Minimum pass/good = 2900-2840

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