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Classic Currents

(1) Tested Balanced Sylvania 6SN7GTB Tube Chrome Dome Black Plate Code DC 6SN7GT

(1) Tested Balanced Sylvania 6SN7GTB Tube Chrome Dome Black Plate Code DC 6SN7GT

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(1) Tested Balanced Sylvania 6SN7GTB Tube.
Date Code DC.

Balanced mutual conductance (Gm) with a chrome dome envelope and black angled T plates.

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

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

Further tested under real operating conditions on a Class A amplifier and exhibiting no microphonics.

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