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(1) Tested Silvertone 17DE4 Tube Date Code 052 Half Wave Vacuum Rectifier

(1) Tested Silvertone 17DE4 Tube Date Code 052 Half Wave Vacuum Rectifier

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(1) Tested Silvertone 17DE4 Tube.
Date Code 052.
The 312 EIA code indicates that this tube was made by Sylvania for Silvertone.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts at 1475 where 800 is minimum pass/good.

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