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I want to flip a composite signal...

Discussion in 'Electronic Repair' started by [email protected], Feb 17, 2008.

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  1. James Sweet

    James Sweet Guest


    Just get a flippable monitor. There were a few CRTs like that, and many LCDs
    are available which simply swivel 90 degrees. I haven't used the DOS version
    of MAME in over a decade, the Windows version has the same functionality.
     

  2. My work with color monitors were the older tri-dot CRTs and the
    convergence went to hell when you reversed the scan.

    I had a set of switches on the back of a B&W TV in my bedroom when i
    was in Jr. High School. I could flip both the vertical and horizontal
    scan. :)


    The only LCD monitors I've used were in laptops. They give me
    headaches, so I try to avoid them.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  3. James Sweet

    James Sweet Guest


    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.
     
  4. 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
     
  5. Arfa Daily

    Arfa Daily Guest

    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
     

  6. 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:

    <http://www.mcminone.com/_goProduct.asp?product_id=21-1180>

    Back View:

    <http://cgi.ebay.com/Mirror-GC-Elect...ZWD1VQQ_trksidZp1638.m118.l1247QQcmdZViewItem>

    here is the folding stand:

    <http://www.mcminone.com/product.asp?catalog_name=MCMProducts&product_id=21-1210>


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


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  7. Arfa Daily

    Arfa Daily Guest

    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
     

  8. 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.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
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