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Classic Currents

(1) Tested Amperex 6EH7 EF183 Tube with Box Holland Etched Date Code ◿9J4

(1) Tested Amperex 6EH7 EF183 Tube with Box Holland Etched Date Code ◿9J4

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(1) Tested Amperex 6EH7/EF183 Tube with Original Box.
Etched Date Code ◿9J4. Made in Holland.

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 = 3150 micromhos
Minimum pass/good = 1575

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