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(1) Tested Strong Motorola 19AU4 Tube Date Code 57-17 Half Wave Rectifier Tube

(1) Tested Strong Motorola 19AU4 Tube Date Code 57-17 Half Wave Rectifier Tube

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(1) Tested Strong Motorola 19AU4 Tube.
Date Code 57-17.
The 260 EIA code indicates that this tube was made by Philco for Motorola.

The name/wording on the base is faded - see photos. See test result below.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts at 1425 where 800 is minimum pass/good.

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