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Classic Currents

(1) Tested 1958 Sylvania 7C5 Tube Code 813 Sylvania 7C5 Loctal Beam Power Tube

(1) Tested 1958 Sylvania 7C5 Tube Code 813 Sylvania 7C5 Loctal Beam Power Tube

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(1) Tested Sylvania 7C5 Loctal Tube.
Date Code 813 (13th week of 1958).

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

Gm Test = 2550 micromhos
Minimum pass/good = 1900

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