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(1) Tested Philco 6H6 Tube Date Code 56-52 Twin Diode Black Metal Tube

(1) Tested Philco 6H6 Tube Date Code 56-52 Twin Diode Black Metal Tube

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(1) Tested Philco 6H6 Tube.
Date Code 56-52.
The 312 EIA code indicates that this tube was made by Sylvania for Philco.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts at 1100-1150 where 800-800 is minimum pass/good.

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