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We're assuming you've got light on the screen.
You didn't unplug the photo-tube and plug it back in. Sometimes the keyway breaks off and that allows you to plug it in any way. Happened to both of my B&K's (1076's)
Something to check.
Something else to check is you should have high voltage on the pins of the phototube.
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Last edited by kf4rca; 12-12-2024 at 09:59 AM.
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