Cabinet is done now, except for the brass frame around the safety glass, which I'm still contemplating what to do with. If I polish it, it's hard to get it back to the right "antique brass" color.
The set is reassembled and working reasonably well. After fixing a problem with the vertical dynamic convergence, I can get the convergence pretty close:
Here's a closeup of the lower left area:
As you can see, the bottom left area is not quite fully converged. The interaction between the vertical and horizontal dynamic convergence controls makes this all rather tricky. The convergence directions in both Sams and the RCA Service Manual offer only limited advice. One thing I notice is that although there are three horizontal convergence adjustments, the directions only mention two. The third, in the high voltage cage (at the top) has a big effect, but I didn't see any instructions on a procedure for adjusting it.
Does anyone have a clear understanding of what each of the three horizontal dynamic convergence adjustments really does? Any tips on further improvement of convergence?
The picture is pretty watchable now, although color tracking is marginal. Although all three guns test very good on my CR-70, the red gun does test a little weaker than the other two, and this becomes very apparent when adjusting the background, drive, and screen controls. The red screen is set at max (about 440 volts on the red screen), the other screens near minimum, the green drive is set at minimum, and no amount of fiddling with everything else can really get the tracking to be excellent.
Here's a screen shot where things look reasonable normal as far as color goes:
