Rca 21D641 HV issue.

[SwizzyMan]

Originally Posted by Eric H

Okay, I found one, a Triad Y-41 (no -1 suffix) assuming it's in the right box (check pictures) it's a 90 deg yoke, 24 Ohm horiz 39 Ohm Vert.

It looks new although some of the soldering on the inside looks a little rough, possibly someone installed the Network components since they seem to be there. There is a small chip in the Bakelite that won't affect anything, there is no cover because they never came with one.

It's yours for shipping.

Due to my work schedule I won't be able to ship until Thursday.

I'll take it. The connector is an octal socket right?

[Eric H]

Originally Posted by SwizzyMan

I'll take it. The connector is an octal socket right?

No, bare wires, you have to install the socket.

I'll get it shipped and let you know how much, send me your address in a P.M.

[SwizzyMan]

PM sent

[SwizzyMan]

Well thanks to Eric for the yoke. This solved my HV problem. Now I can see what I am dealing with. And I was greeted with this. Now this looks like no vertical deflection but the sine wave curves at the left end of the line are what is confusing. How the hell would that come about? The set looks more like an oscilloscope than anything now. At first I thought my yoke leads were wired wrong so I double checked and they are fine. I was able to make the line full length so we DO have full horizontal sweep. I will remind everyone that I have only replaced the filters so far so it may be a bit early to start asking questions like this, but I just need to know what could cause those curves on the end of the line. I do plan on a full recap though. Line is sharper in person.

[bandersen]

Since it's full of leaky paper caps, I would expect all sort of strange behavior including weird ripple and oscillations. I'd start by recapping the vertical circuit and see what changes.

[SwizzyMan]

Originally Posted by bandersen

Since it's full of leaky paper caps, I would expect all sort of strange behavior including weird ripple and oscillations. I'd start by recapping the vertical circuit and see what changes.

I will just start by recapping. It does look like ripple from leaky caps now that you mention it. Thanks Bob.

[Electronic M]

A lot of sets take the B+ boost from the fly and feed it to the vertical, the two sweeps could be interacting and the like.

Hit the sweep stages with fresh caps and see what that does before wasting time troubleshooting.

[Eric H]

Are you certain you don't have the vertical and horizontal windings switched?

[SwizzyMan]

Originally Posted by Eric H

Are you certain you don't have the vertical and horizontal windings switched?

Positive. I did have to rewire some connections though to exactly match the wiring of the old one. I double checked multiple times.

[dieseljeep]

Originally Posted by SwizzyMan

Well thanks to Eric for the yoke. This solved my HV problem. Now I can see what I am dealing with. And I was greeted with this. Now this looks like no vertical deflection but the sine wave curves at the left end of the line are what is confusing. How the hell would that come about? The set looks more like an oscilloscope than anything now. At first I thought my yoke leads were wired wrong so I double checked and they are fine. I was able to make the line full length so we DO have full horizontal sweep. I will remind everyone that I have only replaced the filters so far so it may be a bit early to start asking questions like this, but I just need to know what could cause those curves on the end of the line. I do plan on a full recap though. Line is sharper in person.

I've worked on a lot of those RCA's and I've yet to see a display like that!
It has to be a miswire problem. Go through the wiring proceedure again.

[SwizzyMan]

Just checked the yoke with the ring tester and looked once again at my wiring. Everything is GOOD. This has to clear up with just a little maintenance.

[Eric H]

Just for fun you might try swapping the vertical and horizontal connections at the plug.
Sometimes after market parts are wired differently and if you just copied the connections from the old one it may be wrong.

Easier still, just hook up the horizontal and see if you can get a flat line across the screen (brightness low).

I have hooked up yokes wrong before and the results looked a lot like this, not that it can't be caused by bad caps but it is an odd pattern.

You could also just start recapping the set and see if it gets better, if it hasn't improved after recapping the horizontal then you might revisit the yoke connections.

[SwizzyMan]

This is whack. So i did some searching through the sams and I found some different wiring instructions for the yoke. I rewired as it states and added c108 over terminals 2 and 7. The result is full horizontal but no vertical and those waves are still there. Im starting to think this is some kind of problem with the yoke. I'll keep investigating. https://gyazo.com/6810887174ded912a8eb1f383df51011

[bandersen]

The vertical yoke coils will have a larger resistance than the horizontal. Double check with an ohmmeter.

[tom.j.fla]

If you are now sure the yoke is wired correctly you need to see if there are any strange signals on the B+ boost supply. Boost also feeds horiz. osc as well as the vertical height control and crt. Best tool for that job is a good scope and knowing how to use it. Look at your sams there are 3 caps that filter the boost supply, my guess is that one or all three are open. Your snapshot sure looks like horiz sweep feeding back on itself. Just my 1.5 cents worth. All the best, Tom.J