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Classic Currents

(1) Tested GE 12AT7/ECC81 Tube Date Code SY GE 12AT7 ECC81 Twin Triode Tube

(1) Tested GE 12AT7/ECC81 Tube Date Code SY GE 12AT7 ECC81 Twin Triode Tube

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(1) Tested GE 12AT7/ECC81 Tube.
Date Code SY.

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

Gm Test = 4250-4625 micromhos
Minimum pass/good = 2500-2500

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