I want to flip a composite signal...

Yeah dynamic convergence will have issues, but I'm not old enough to have ever dealt with one of those. Everything was inline gun static convergence for as long as I can remember.

Well on my desktop PC I use a windows version, but I don't use MAME much on my destop. I have a MAME cabinet and I use dos because of lack of CPU power and convience of booting stright to the game. It primarly runs Ms PacMan since it is a Ms PacMan coctail table. It was quite a project, I built it from scratch and it came out rather nice looking. I set it up with a Joystick on each side and two buttons on each side. The hdd is dead right now. I really need get off my butt and fix it. .

Mike

Mike

Mike

Ha!! Dynamic convergence was soooooo much fun ! It was another of those things that was more 'art' than science. You either had it, or you didn't. I worked with guys that were twice and three times my age back then, who had endless years of experience in TV repair, and could not converge a tri-dot shadowmask CRT - or set up its purity rings - to save their lives. Having replaced a CRT, I could set them up as perfectly as they would go in little more than 5 minutes. Anybody remember the special surface-silvered mirrors that we had for setting the static convergence with the four magnets on the CRT neck ? We had one that was constructed into a wooden frame with 'arms' on it. It lay across the top of the cabinet, and hooked at the back under the cabinet top. The mirror section then hung down in front of the screen, and as it was surface-silvered, you didn't get any distortion in the image due to glass thickness. Happy days ...

Arfa

I saw an older tech replace a 21JP22 round color CRT. (Over 40 years ago.) He forgot to take the safety glass off the old tube. he had the new tube in and convereged when he discovered that the dud didn't fit back into the carton. So, he had to remove the yokes and CRT, install the glass, and new CRT. When he fired the set up again, it had perfect purity and convergence. Man was he upset. He kept complaining that it was impossible, and was waiting for something to blow up. ;-)

BTW, I learned a lot from Dave, in that after school, part time job.

? Anybody remember the special surface-silvered mirrors

We used real glass mirrors like this: See the bracket on the back? That is where it slipped onto the folding stand.

Front view:

Back View:

here is the folding stand:

Talk about a price increase! That's about $100, and it used to be about $10. :(

That's sweet. As I recall, the one we had came from one of the UK set manufacturers - possibly Rank Bush Murphy or RBM as they liked to be known. It was professionally made. All wood and sprayed grey. It had several wing-nutted 'joints' that could be adjusted to get just the view you needed. In the workshop, we had mirrors mounted on the back of each bench.

Arfa

That GC mirror and folding stand would fit into the bottom of a large tube caddy, so you didn't have to carry it separately, or make another trip to your truck. We carried them in the main caddy, with the most popular tubes. two other caddies carried the other TV tubes, and a couple of the trucks in or company carried all the tubes for all the Public Address equipment we serviced.