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Classic Currents

(1) Tested 1947 Western Electric 403B Tube Black Plates with Box Date Code 713

(1) Tested 1947 Western Electric 403B Tube Black Plates with Box Date Code 713

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$28.95 USD
$28.95 USD
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(1) Tested 1947 Western Electric 403B Tube with Original Box.
Date Code 713 places the production to January - March of 1947.

Black plates with top square D angled getter.
The box has some staining and surface tearing - see photos.

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

Gm Test = 4250 micromhos
Minimum pass/good = 2750

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