My Brand New CTC-7!

[roundscreen]

Originally Posted by SwizzyMan

Ok this horizontal hold problem is really starting to piss me off. I have to wait at least 20 minutes before I can use the damn thing. This has plagued me since the start of this restoration and quite frankly I am sick of it. I've replaced all but one capacitor on the horizontal board it is a ceramic cap. Heater voltage on 6CG7 is fine. I want this fixed for good. How can I do this? Please help!

Sorry I was not around yesterday, A good friend passed away.
If you start getting pissed off, Take a break from the set. The problem may be you replaced a mica cap with a ceramic cap. Try and find a film cap and replace it again. Double check your work. See if you missed something. Also can you adjust the horz hold to a normal picture when the set is cold? Most of us have been through the same thing, So you are not alone. It takes time to learn how to fix vintage TV.

[SwizzyMan]

Very sorry about your friend I still want to continue with the set I was just a little frustrated last night with other problems. I will check if I used Micas in the right place and ceramics in the right place. Can get a somewhat stable lock but my color goes all wonky. Also the picture swerves from left to right. Eventually I get full lock and great color after about 20 minutes of running the set.

[SwizzyMan]

Yes Dave the 68K resistor checked fine when I tested it with one leg unsoldered from the board.

[SwizzyMan]

Turned the set on today and it took a little less than 5 minutes to get full hold and great colors. Is it slowly fixing itself maybe?

[DaveWM]

sometimes things get better with use, I have heard theories that could be moisture being driven out with heat. So try using it and see if it continues to improve.

If not, you need to determine if its an osc prob or a sync pulse prob.
you could try monitoring the voltages of the sync sep tube to see if anything is changing from when 1st turned on to when it settles down.

[SwizzyMan]

Will keep an eye on it. Starting to refinish the cabinet today.

[old_coot88]

I believe you mentioned the h.osc tube (6CG7) is NOS. But it still could be borderline weak, causing the long lag to lock in.
Perhaps one of the kindly souls here could send you a known-good-in-H.osc-service 6CG7.
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There's a 'quick & dirty' test that old techies used a lot in the field for this kinda problem.
Have the set warmed up and everything locked in. Turn the set off for about 7 seconds, and then back on. It should come on with the horiz fully locked in. If it comes on with lines and there's a delay to lock in, it's a sure sign the osc. tube is borderline.

[roundscreen]

Originally Posted by SwizzyMan

Turned the set on today and it took a little less than 5 minutes to get full hold and great colors. Is it slowly fixing itself maybe?

If the problem comes and goes, You may need to re solder the grounds on the horz board. I should have mentioned this before but forgot. I did it on my set just to avoid a problem. Pointing at one so you can see what they look like.

[SwizzyMan]

Will do after I finish the cabinet.

[SwizzyMan]

OK swapping tube did help and I can get a somewhat stable lock but still it has to heat up for about 3 minutes.