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(1) Tested Sylvania 12AT7 Tube with Box Code be JRH Twin Triode Vacuum Tube

(1) Tested Sylvania 12AT7 Tube with Box Code be JRH Twin Triode Vacuum Tube

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$22.95 USD
$22.95 USD
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(1) Tested Sylvania 12AT7 Tube with Original Box.

The box shows scuffing overall.

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

Gm Test = 4125-3750 micromhos
Minimum pass/good = 2500-2500

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