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(1) Tested Sylvania 10GF7 Tube with Box Date Code ib Sylvania 10GF7 Dual Triode

(1) Tested Sylvania 10GF7 Tube with Box Date Code ib Sylvania 10GF7 Dual Triode

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(1) Tested Sylvania 10GF7 Tube with Original Box.
Date Code ib.

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

Gm Test = 575-4250 micromhos
Minimum pass/good = 220-3450

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