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Classic Currents

(1) Tested 1960 Philco 4CS6 Tube Code 6009 Pentagrid Amplifier Tube Sylvania EIA

(1) Tested 1960 Philco 4CS6 Tube Code 6009 Pentagrid Amplifier Tube Sylvania EIA

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(1) Tested Philco 4CS6 Tube.
Date Code 6009 (9th week of 1960).
The 312 EIA code indicates that this tube was made by Sylvania for Philco.

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

Gm Test = 425-900 micromhos
Minimum pass/good = 190-315

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