53 Sylvania up & running

[Mick AV-8]

Wanted to update and thank everyone for the help..in getting me to obtain a watchable picture on my 1953 halolight Sylvania.
Got the volume control to work by replacing the two audio tubes and cleaning the control and sockets with solvent cleaner. Volume and brightener controls work nice and no loud crackle sounds when adjusting volume.
Need to tweek horizontal now and then but seems to be stable. Takes about a minute for the horiz. tube to warm up..but then locks in the picture pretty nice.
I losened the two wing nuts on the yoke and twisted the whole thing gentley to the right and now the picture is level..the movie intros and wording is now level and when the action starts with the movie characters...they do not look like they are running up a hill.
Have to push the picture a little to the right..as there is a thin black band there..but do not know how that is done?
Also have some shadowing or think it is called ghosting on the left of screen only. Read that it could be caused by phosphor charge. Should I extend the dang coat further out to the front of the picture screen..or use some foil to eliminate any charge?

Or is there a chassis tube that needs to be replaced or checked that controls this effect?

Thanks for any ideas or inputs...I want to again thank all who pushed me along and helped with there typing time and experience.

[old_tv_nut]

"Have to push the picture a little to the right..as there is a thin black band there..but do not know how that is done?
Also have some shadowing or think it is called ghosting on the left of screen only. "

Does it look like part of the picture is folding over on the left? This, along with the black on the right could be a horizontal phasing problem. Does the "ghosting" (and black area) change width if you turn the horizontal hold?

[jeyurkon]

Congratulations on getting your set running! It must feel good to have accomplished that.

The ghosting and black band could be horizontal phasing as old_tv_nut suggests. It's difficult to say. A photo would really help. In either case I don't think extending the dag will help.

If you remove the 6AL5 horizontal discriminator tube the horizontal should just roll slowly if the horizontal hold is properly adjusted. Then lock in within 15-30 seconds after replacing it.

If you had a dot/bar generator or alignment pattern DVD disc it would make it easier to see what's going on with regards to the centering.

If I haven't scanned the service notes for the horizontal section of this set, or if the Sams doesn't describe it, let me know and I'll try to get them to you later in the week or early next week.

John

[Mick AV-8]

Picture is pretty decent. It does not seem to roll over on the right.
When I put on the tv the picture will roll up and down and when tubes warm it will lock in. The ghosting..is only on the left side(as you face the tv) and it kind of looks like sun was hitting the the glass..kind of like a glare but inside the tube. it not always there...
Sometimes depending on the movie...picture will fill the screen fully..and another disk will have the line. Some screen shots are too big for the screen and when I click the three selector switch in the back to change the screen size the black line will get wider.
Alsmost think that if I twisted the yoke in the back to the left it would throw the picture over a little..would that work?
I could losen the wing nut on eith side of the yoke and try and turn the ring....

[jeyurkon]

Maybe, just be gentle. The ion-trap should be adjusted for maximum brightness. But it also affects the position. Maybe it's off just a little?

I think I know what you mean about the ghosting. But it's hard to be sure without seeing it. I have something similar on my Sylvania occasionally. It looks like the beam scatters off of the bell and on to the screen.

If it's caused by incorrect phase adjustment it'll be a stretched out image. But it's not always easy to tell if it's that. I believe the black band on the right should be about 1/4" wide if the phase is right.

John

[Mick AV-8]

It looks like the beam scatters off of the bell and on to the screen.

That is what it looks like exactly..like a reflection off the bell.

If it's caused by incorrect phase adjustment it'll be a stretched out image. But it's not always easy to tell if it's that. I believe the black band on the right should be about 1/4" wide if the phase is right.

How can I adjust the phase?
Sometimes I think the images of the people look a little elongated..
So maybe I should try this adjustment if you can elaborate. And yes the black band is about 1/4" wide..but what do you mean by if the phase is right?

[jeyurkon]

Originally Posted by Mick AV-8

It looks like the beam scatters off of the bell and on to the screen.

That is what it looks like exactly..like a reflection off the bell.

If it's caused by incorrect phase adjustment it'll be a stretched out image. But it's not always easy to tell if it's that. I believe the black band on the right should be about 1/4" wide if the phase is right.

How can I adjust the phase?
Sometimes I think the images of the people look a little elongated..
So maybe I should try this adjustment if you can elaborate. And yes the black band is about 1/4" wide..but what do you mean by if the phase is right?

It sounds the phase is right. I'll have to scan the procedure, it's fairly long, word-wise.

The horizontal linearity and drive might need adjusting also. I'll scan that too.

John

[jeyurkon]

I went back and looked at your older posts and realize that you do have the Sams Photofact. I also picked up a copy to make sure I don't lead you astray.

I was wrong about one thing. The black bar should be about 1/8" wide. That seems odd to me since my 10" set is also supposed to have it 1/8" wide. That should help with the wrap around on the left anyhow.

If you follow the "complete horizontal oscillator alignment" on page 10, you will be setting the phase properly.

I would also do the "Horizontal linearity adjustment" on the same page.

John

[Mick AV-8]

Thanks John..found the pages you sent and the pg. 10 instructions!
I will give it a go and see if I can make the picture better.
Hope this is not pandoras box I am going to open....

[zenith2134]

....just wanted to say that i'm enjoying this thread from a strictly technical standpoint..... carry on

[Mick AV-8]

Okay...hope everyone is having a good weekend. Trying to get in a few tweeks on the tv..without my wife looking for me..
Went through the horizontal circuit adjustments.
I did get the horizontal drive control to crowed in the center..and then turned it cc to remove crowding.
Also notice that the brightness contol knob outside the volume control on the front..does adjust the brightness..but it also enlarges the picture to eliminate the black band on the right. But the picture quality and brightness are to suffer and it is too bright..so I bring it back and there is a slightest of 1/8" band there.
Also as I continued on ..I switched the horiz. size switch to find the best picture size..and when I turn thr B3 horiz. linearity screw..that is suppose to make the picture symetrical from left to right..it does not seem to do anything at all. I mean I turned it way in and way out with no effect..good or bad.

Still a decent picture...some ghosting still present now and then.

So..Do you guys have the 1/8' black band there on the right depending on what DVD you are watching?
And do you guys sometimes have this ghosting effect now and then?
thinking...
Maybe I should just enjoy the success I have found up til now with all of your help!

[Mick AV-8]

Just another comment..I will go back and recheck if the horiz. hold changes the black line ....now that I have done some of these previuos adjustements..so I can answer tv nuts question.
But tell me if when you guys watch and old movie that has some wording on the screen like cast or story line...mine does not seem to all fit all the words on the screen.
Sometimes quite a few letters are out of the picture..

[Kalamazoo-DJ]

cool, but as for DVD problems I get them on every player I put to my 25MC33 Zeniths. I was told by a very experienced vintage repairman that DVD scramblers can cause all kinds of distortions on old tube tv's. I get what looks like seperate color bars that fade off and come back on in about a 6 second cycles. He is putting direct video RCA inputs into my Maggie so that doesnt happen. He said distortion comes from dubbing piracy scramblers on coaxialDVD/VCR connections IE: when you see the cycles of darkening and lightening of the picture on some SS tv's while playing a dvd through a vcr. Not sure how true this is but worth a try.

[jeyurkon]

It's not unusual to be unable to see all the text on a vintage set.

The picture expanding with brightness is because the HV is sagging when you draw a lot of current at high brightness.

The other problem I notice when I watch a DVD is that the macrovision and teletext at the top of the scan is quite bright and that's where I get most of the scattering off of the corner of the CRT bell.

When you say that there is a black band on the right side, are you talking about the width of the blanking or that you have insufficent horizontal (or miscentered)?

John

[jeyurkon]

You might want to check R99.

John