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(1) Tested Raytheon 0C3 Tube Code 526 Voltage Regulator Vacuum Tube

(1) Tested Raytheon 0C3 Tube Code 526 Voltage Regulator Vacuum Tube

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(1) Tested Raytheon 0C3 Voltage Regulator Tube.
Date Code 526.
The tube number on the top of the glass is faded.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts at 1250 where 800 is minimum pass/good.

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