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Classic Currents

(1) Tested 1957 Sylvania 7B4 Tube Code 7-52 Triode Loctal Tube Loktal Tube (a)

(1) Tested 1957 Sylvania 7B4 Tube Code 7-52 Triode Loctal Tube Loktal Tube (a)

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$8.95 USD
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(1) Tested Sylvania 7B4 Tube.
Date Code 7-52 (52nd week of 1957).

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

Gm Test = 1750 micromhos
Minimum pass/good = 940

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