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Classic Currents

(1) Tested 1953 Sylvania 6SB7Y Tube Code 3-26 Sylvania 6SB7 Y Pentagrid Tube

(1) Tested 1953 Sylvania 6SB7Y Tube Code 3-26 Sylvania 6SB7 Y Pentagrid Tube

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(1) Tested 1953 Sylvania 6SB7Y Tube.
Date Code 3-26 (26th week of 1953).

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

Gm Test = 1200-275 micromhos
Minimum pass/good = 470-190

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