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Classic Currents

(1) Tested RCA 6X8 Tube with Box Date Code 4-52 Triode Pentode Converter Tube

(1) Tested RCA 6X8 Tube with Box Date Code 4-52 Triode Pentode Converter Tube

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(1) Tested RCA 6X8 Tube with Original Box.
Date Code 4-52.

The wording is partially worn but still recognizable as being RCA branded. 
The box has a small bit of writing on the front tab.

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

Gm Test = 4000-5375 micromhos
Minimum pass/good = 2900-2840

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