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(1) Tested Strong Sylvania 5U4GB Tube Black Plates Square Halo Getter Code 739

(1) Tested Strong Sylvania 5U4GB Tube Black Plates Square Halo Getter Code 739

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$34.95 USD
$34.95 USD
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(1) Tested Sylvania 5U4GB Tube.
Date Code 739.

Black plates with a square halo getter.
There is some faint small white spotting on the glass but this does not affect performance.

This tube tests as NOS.

Tested on a calibrated Hickok TV-10 military tube tester and exhibiting no shorts at 1750-1650 where 800-800 is minimum pass/good.

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