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Classic Currents

(1) Tested Strong RCA 9AU7 Tube with Box Date Code NF RCA 9AU7 Double Triode (b)

(1) Tested Strong RCA 9AU7 Tube with Box Date Code NF RCA 9AU7 Double Triode (b)

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(1) Tested RCA 9AU7 Tube with Original Box.
Date Code NF.

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

Gm Test = 2600-2450 micromhos
Minimum pass/good = 1400-1400

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