Help! I have an old video sculpture I built in 1995. It has three 9" B
& W monitors. They were originally obtained via mail order from Herbach
& Radman - they're just a circuit board and a CRT - it takes composite
input, operates at 12V.

Well, I just sold this sculpture to someone, and need to get it working
properly again. I tested the 3 monitors; two are good but one of them
will not hold a stable pictu no matter how carefully I adjust
Horizontal hold, Vertical Hold (and V. LIN.) it rolls and shudders side
to side, changes vertical rate (I think), won't lock in.

I had a spare, never-used CRT in storage. I took it out, hooked it up
exactly like the others, and it does the same thing! So that's two out
of four that are doing this. Seems doubtful that they would have bad
components, as they have very very little use and were stored away. I
must be overlooking something.

I don't know much about video circuits, so I would really appreciate
any illuminating comments.

I got help with these monitors on this newsgroup back in 1995. The
thread can be read he

http://groups-beta.google.com/group/...92d81106c78f24

I don't have the follow-up emails with Sam Goldwasser that helped me
iron out the original synching problem in 1995, but it looks like I did
install a jumper on an IC -The IC part number is: TDA1180P. (TV
HORIZONTAL PROCESSOR). I jumpered pins 8 & 9 (Vertical Sync. Separator
Input & Sync. Separator Input).
Thanks for any help.

***** Live Long and Phosphor *****