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Classic Currents

(1) Tested 1966 RCA 6SN7GTB Tube Tall Bottle Black Offset Plates Code BH 6SN7 GT

(1) Tested 1966 RCA 6SN7GTB Tube Tall Bottle Black Offset Plates Code BH 6SN7 GT

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(1) Tested RCA 6SN7GTB Tube.
Date Code BH (November of 1966).

Tall bottle envelope with a thin base, black staggered plates and a bottom square D getter.
The tube number is worn off of the glass.

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

Gm Test = 2500-2625 micromhos
Minimum pass/good = 1650-1650

Also performance tested in-circuit through a Class A amplifier with no microphonics detected.

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