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Old 11-12-2021, 09:59 PM
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TinCanAlley TinCanAlley is offline
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Quote:
Originally Posted by ChrisW6ATV View Post
I have seen quite a few (weaker, typically) CRTs that would not show any meter movement even with the G2 control all the way up. I would still proceed with testing them. If the test indicated "good", then I considered them "not fully good, but usable overall".

In other discussions of testing CRTs, the ability to get that "one division increase" (or equivalents on non-B&K testers) was described as the CRT "having good cutoff".
I'm starting to think a capacitor or such in the tester is going bad. I have three green/monochrome CRTs and all cannot raise the 1 division, but they each test differently for emissions. The one in my TRS-80 4 is bright and clear, but does poorly in emissions, my IBM 5151 test near the top of the good range and my Canon monitor tests poorly. None of them can raise 1 division for G2. There is a 50uf 450V capacitor, and I think I will remove and test. I don't have an ESR, so I have to pull it.
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