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Classic Currents

(1) Tested RCA Cunningham Type 55 Tube Date Code F2 Engraved Base RCA 55 Tube

(1) Tested RCA Cunningham Type 55 Tube Date Code F2 Engraved Base RCA 55 Tube

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(1) Tested RCA Cunningham Type 55 Engraved Base Tube.
Date Code F2.

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

Gm Test = 1175 micromhos
Minimum pass/good = 610
Both diode sections test at 1600 and 1300 where 800 is minimum pass/good.

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