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(1) Tested Raytheon 6BK7A Tube with Box Japan Date Code S12 6BK7 A Twin Triode

(1) Tested Raytheon 6BK7A Tube with Box Japan Date Code S12 6BK7 A Twin Triode

Made in Japan

$11.95 USD
$11.95 USD
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(1) Tested Raytheon 6BK7A Tube with Original Box.
Date Code S12. Made in Japan.

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

Gm Test = 7750-9250 micromhos
Minimum pass/good = 5350-5350

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