Convergence issues.
 

I have tried to get good convergence on my 16 and have failed miserably. I've been using a VCD I made up of color bars, crosshatch and an indian head test pattern (different from the one on Chuck Pharis's site). For the most part, I can get center decent. Top and bottom are also decent, but left and right R/G vertical lines don't come close. It's throwing a bunch of other stuff off. I can't see the misalignment that well with the crosshatch, but I sure can see on regular broadcast. I am going to replace the selenium pack with silicon diodes (might solve the problem). I placed the convergence yoke, putiry rings and blue lateral magnet back on the tube according to the clean areas on the neck (I didn't clean the tube off when I swapped out the cabinet).

What is the exact placement of the elements on a 21FJP? I have experimented with different positions and have it "almost right". When I went to adjust purity, turning the rings actually threw the convergence off. So, in addition to rotten convergence, I also have rotten purity. I know I sound like a total idiot, but I never could get a decent convergence on any color set I ever had. Any help is greatly appreciated.

Dave:

Here is a chart showing the placement of the components on the neck of the picture tube.

Steve

Thank you, Steve. This will help immensely. I'll resume work tomorrow. Right now... it's Miller Time.

Got It!
 

I did what the pic said and finally got decent convergence. It's not perfect, but it's very viewable. For your entertainment, here's a pic of Meathead calling Archie names.

Steve,

As much as I love old Roundies, the Sony Trinitron sure was a blessing... :scratch2:

Dave:

Nice job! With a little practice convergence gets a lot easier. There was a time I could converge a set by watching an off air show with the color turned down. That was a long time ago though and at the time I only worked on Zeniths.

Steve:

A Sony Trinitron? Still not as good as my CT-100!

Steve

And not as cute as your old B&W set (now mine..) :banana:

Sorry for the digress, back to convergence!

In my experience with roundies (while working at an independent tv shop in the late '60s), the CTC-16 was the least likely chassis to obtain good convergence, especially on the right side. No matter what. Good job!

Thank you all. I am calling this finished for now. When i switched cabinets, I never looked to see if the screws for the tuner mount were there. I have to go north and swipe the ones from the other bezel. For now, I have to change channels from the back. With all the feedback I have recieved about the cabinet, I have decided to keep it, despite the bad areas. I will keep the other and if i find another 16, I'll use it.

I will post a finished picture as soon as I can get what I need.