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(1) Tested Philco Type 41 Tube Date Code 9U Power Amplifier Pentode Tube

(1) Tested Philco Type 41 Tube Date Code 9U Power Amplifier Pentode Tube

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(1) Tested Philco Type 41 Tube.
Date Code 9U.

This tube tests above NOS ratings.

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

Gm Test = 1675 micromhos
Minimum pass/good = 1000
Average NOS rating = 1500

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