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- - B&W CRT Question (http://www.videokarma.org/showthread.php?t=276057)

Chris K

08-13-2023 04:10 PM

B&W CRT Question

Hi all. I have a 10BP4 with strong emissions down to 4 volts, no shorts but the cutoff is poor. How does a tube get this way, what is going on inside the tube that might create this condition, what kind of picture quality can I expect and is there anything that can be done to remedy it?
Thanks VKers!

Polaraligned

08-13-2023 06:48 PM

The cutoff test measures the effect of the control grid. If you have poor cutoff, the contrast may be poor. I would just try the CRT in the set and see how it performs. The tester may be lying.

Electronic M

08-13-2023 07:49 PM

I had a tube with absolutely no cutoff in a RCA set and it actually worked ok and looked fine.

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