Fleetwood Constellation Restoration Thread

[VintagePC]

I've gone through and replaced all of the worst offenders. Foldover problem is now gone, but it still seems to have an issue with excessive B+ (~290V at 117VAC in, when schematic calls for 260)

[VintagePC]

Further update here. I've replaced all of the resistors in the set (except those in the tuner). Interestingly enough my B+ is now at around 300V, and does seem to be contributing to the excessive width problem.

Apart from that, the picture is nice, but could benefit from an alignment. It's a bit fuzzy and the fine tuning is at one end of the extreme... as well as some ghosting to the right of the image and sound bleeding. I'm trying to track down some gear to help me with that now.

[VintagePC]

OK, I had a sit-down today and tried to see what I could get in terms of linearity and so on. (Pictures linked because they're large)

Geometry is pretty good:

https://dl.dropboxusercontent.com/u/...7/CAM00009.jpg

Picture isn't too bad but the contrast is cranked pretty high and it's not the greatest. Also you can see there's a bit of a halo going on to the right of any sharp contrast changes. The distance of the halo changes as I adjust the fine tuning, but it's not possible to completely get rid of. Looks to be some sort of ringing going on with the video signal. I am missing a tube shield on the tuner (6BQ7) and on the vertical (6W6), so that _might_ be related.

The other thing is that there's only a very small band where the picture is good. Just a touch to the left or right on the fine tuning, and the contrast is very poor. On top of that, being off on the fine gives me warping in the picture as well:

https://dl.dropboxusercontent.com/u/...7/CAM00012.jpg.
Those are standard bandwidth bars, but they probably don't say too much about the capabilities of the set given they were generated from the S-video out of my laptop into a dubious VCR RF modulator.

Sooo... I'm somewhat unsure of where to begin with these issues (well, I can apply my standard troubleshooting, but hopefully someone here can pinpoint what needs looking at). Any paper caps were replaced, as were _all_ resistors except those buried in the tuner. I was hoping these issues might go away when I fixed some of the wrong-value replacement resistors with the ones originally specced for, but I guess not

[VintagePC]

Whelp, I think I'm gonna call this done for now. There are a few things left to do but those will be as time permits, they aren't as critical to get things working again.

Writeup here:
http://vintagepc.co.nr/site/index.php/stuff/tv/