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Classic Currents

(1) Tested RCA Radiotron Cunningham Type 55 Tube Code L12 Engraved Base

(1) Tested RCA Radiotron Cunningham Type 55 Tube Code L12 Engraved Base

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(1) Tested RCA Radiotron Cunningham Type 55 Engraved Base Tube.
Date Code L12.

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

Gm Test = 1125 micromhos
Minimum pass/good = 610
Both diode sections test at 1600 and 1450 where 800 is minimum pass/good.

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