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Classic Currents

(1) Tested Strong Western Electric 407A Tube Code 6339 407 A Double Triode

(1) Tested Strong Western Electric 407A Tube Code 6339 407 A Double Triode

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$16.95 USD
$16.95 USD
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(1) Tested Very Strong Western Electric 407A Tube.
Date Code 6339.

Black plates with a top square D getter.

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

Gm Test = 6000-6125 micromhos
Minimum pass/good = 3300-3300

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