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Classic Currents

(1) Tested RCA 3CS6 Tube Date Code BM Pentagrid Amplifier Vacuum Tube

(1) Tested RCA 3CS6 Tube Date Code BM Pentagrid Amplifier Vacuum Tube

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(1) Tested RCA 4CS6 Tube.
Date Code BM.

This tube tests well above NOS ratings.
The box shows light scuffing and edge wear.

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

Gm Test = 450-750 micromhos
Minimum pass/good = 190-315
Average NOS ratings = 285-475

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