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Classic Currents

(1) Tested RCA Cunningham Type 41 Tube Engraved Base Date Code J12 Power Pentode

(1) Tested RCA Cunningham Type 41 Tube Engraved Base Date Code J12 Power Pentode

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(1) Tested RCA Cunningham Type 41 Engraved Base Tube.
Date Code J12.

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 = 1000

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