#16
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Quote:
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#17
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I will, definitely. I think to go further, I'll need a SAMS on the set. Going to have to order one online.
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#18
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My CTC51K wouldn't stop rolling and the size and linearity wouldn't adjust properly. Even when I replaced the 13GF7 and the 50MFD 'lytic. My set is a real cheapie. It never came equipped with a degaussing coil. |
#19
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As long as we're discussing this chassis, what the heck is this lever thing? Is this how horizontal centering is accomplished, or is it something else? I haven't touched it, but it seems like it would rotate in the opposite direction if it was....
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#20
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prob loosen the yoke
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Audiokarma |
#21
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It's a long screw for the yoke clamp. Actually for the whole yoke and convergence assembly.
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#22
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Makes sense, thanks. I was hoping deep down that it *was* some type of horizontal centering adjustment, as I can't get the set to fill out about an inch on the right side of the screen.
Linearity was a little out of whack, but it pulled in fine with a little tweaking.....sounds like I may be looking at new resistors there as well, but damned if I can figure out how to adjust the horizontal centering.
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#23
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#24
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Are you sure the damper tube and horizontal output tube is perfect? When you see an image on the screen, such as text, does it seem centered? If so, your problem is insuffient sweep. Is your B+ Around 255 volts? BTW, is that the CTC53 or the CTC36, as you seem to be working on two sets. |
#25
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...
Last edited by andy; 12-05-2021 at 08:05 PM. |
Audiokarma |
#26
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I seem to recall reading somewhere that defects in the dual diodes in the horz AFC circuit can sometimes cause odd shifts in the horz centering.
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#27
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You need Sams 1342-2. I'm sure somebody on here could set you up with a copy (I have one but not a spare, and I'm trying to keep one full set). The part number for that brightness pot is 126307. It has to come from the CTC53XM chassis; I'll have to check what I have.
__________________
Bryan |
#28
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I think my local library has some SAMS there. I could perhaps see if I can photo copy the book if it's not too many pages.
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#29
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Everything seems centered, but it's so damned close to the edge right now I can't tell if it's a sweep issue or a centering issue. I didn't check B+, because I figured there *had* to be a simple adjustment for this. Ain't seeming like it . And my tester won't do these particular tubes....again, figuring it was an adjustment. Pretty sure that something somewhere has drifted in value, because after a couple hours of play, it seems to have just about centered itself somehow. I'm not going to ask HOW, but now there's maybe 5/16" of blank real estate on the right side, and that I can live with for now. I decided that I'm going to go ahead and replace the resistors on the board of the CTC36, I just have to determine the rating of them. Since I don't have the sams for it, I may wait until I get one, I'll probably order over the weekend. I would assume that 1 watt would do, but I don't want to get any surprises down the road.
__________________
"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#30
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It can also cause very weak H sync.
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Audiokarma |
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