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(1) Tested Sylvania Type 27 Tube Date Code A5R Engraved Base 27 Tube Triode

(1) Tested Sylvania Type 27 Tube Date Code A5R Engraved Base 27 Tube Triode

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(1) Tested Sylvania Type 27 Engraved Base Tube.
Date Code A5R.

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

Gm Test = 1050 micromhos
Minimum pass/good = 630

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