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(1) Tested RCA 12SK7 Tube with Box Date Code BZ 12SK7 Pentode Metal Tube

(1) Tested RCA 12SK7 Tube with Box Date Code BZ 12SK7 Pentode Metal Tube

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$11.95 USD
$11.95 USD
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(1) Tested RCA 12SK7 Tube with Original Box.
Date Code BZ.

The box has scuffing overall - see photos.

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

Gm Test = 2250 micromhos
Minimum pass/good = 1260

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