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(1) Tested Sylvania 7Y4 Tube with Box Code 3-52 Loctal Tube Rectifier Tube

(1) Tested Sylvania 7Y4 Tube with Box Code 3-52 Loctal Tube Rectifier Tube

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(1) Tested Sylvania 7Y4 Loctal Tube with Original Box.
Date Code 3-52.

The box shows overall scuffing and edge wear.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts at 1350-1425 where 800-800 is minimum pass/good.

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