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04-29-2023, 06:01 PM
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21CT55 alive
I went back to my 21CT55 this weekend after two years of other things to do. It is recapped and I did a wholesale tube replacement as they were tired. A variac power up went fine but the pic was garbage. I am using a DVD through a Drake modulator with variable RF out. An AGC tweek fixed the garbage video and setting the Drake for a good RF output helped. Convergence is for another day with the left side quite out of whack. My problem is the CRT settings. It has RGB screen, BG gain, BG background in that order. I can get close from the factory manual instructions but when I go back to fine tune I send it way off. Does any owner have any shortcut tricks to this? Pic to follow as I figure out the settings.
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“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes. Last edited by Dave A; 04-29-2023 at 06:14 PM. 
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