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Classic Currents

(1) Tested Very Strong RCA 12BQ6B Tube Date Code BF RCA 12BQ6 B Beam Power Tube

(1) Tested Very Strong RCA 12BQ6B Tube Date Code BF RCA 12BQ6 B Beam Power Tube

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(1) Tested Very Strong RCA 12BQ6B Tube.
Date Code BF.

The tube number is faded on the glass.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts and no leaks with the following results:
Gm Test = 5900 micromhos
Minimum pass/good = 2800

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