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(1) Tested Philco 12GN7 Tube Japan Cool Chassis Gray Plate Halo Getter Pentode

(1) Tested Philco 12GN7 Tube Japan Cool Chassis Gray Plate Halo Getter Pentode

Made in Japan

$6.95 USD
$6.95 USD
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(1) Tested Philco "Cool Chassis" 12GN7 Tube.
Made in Japan.

Gray plate with a top O ring halo getter.
The wording is mostly worn off - see photos.

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

Gm Test = 12,500 micromhos
Minimum pass/good = 9500

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