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Thread: For you monochrome lovers out there, which phosper do you prefer?

  1. #31
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    Um, don't monochrome monitors have pretty much infinite dot pitch (unlike shadow-mask CRTs)?

    To that point, don't many of the CRT-to-35mm setups use a small CRT with color filters (no shadow mask)?

  2. #32
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    Indeed, they don't have a mask or anything. That's why they're so sharp, though unknown may have been looking at a color monitor that had green and amber settings.

  3. #33

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    The only non white Mac monitors to my knowledge were the original Hackintoshes in Computer Shopper. Or the outcome of "Build Your Own Mac and Save a Bundle" by Bob Brant. Even Radio Electronics had such a series. Not sure if they scarfed up paper white crts or not.

  4. #34

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    I love amber MDA/Herc for writing work. Green is a close second and good for evoking memories.

    I have one decent white mono VGA but have had many others, MDA and VGA, whose combination of phosphors to make white (yellow/blue) were too obtrusive, especially during eye movements. It's hard to get good, stable, sharp mono displays. I've bought and resold several that weren't good enough, even after internal adjustment.

  5. #35

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    Quote Originally Posted by AlexC View Post
    I have one decent white mono VGA...
    Paper White VGAs are the best for document work, reading, etc.
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  6. #36
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    THe nicest is blue letters on black screen. Some Olivetti monitors do that.

  7. #37
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    I remember in later years Phillips did a paper white monochrome display that was almost flat. I'd love one of those again.
    But by default I prefer a nice Amber.
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  8. #38
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    Paper white is also nice, I have a few Olivetti MS-DOS based typewriters which have paper white CRT, the software can run it normal and inverse. And don't forget the famous ATARI SM 124 black/white monitor...

  9. #39
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    My personal preference is amber first, then gray/paper/white slow phosphor second, then finally green.
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  10. #40

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    Part of this relates to the early CRT's for both television and general electronic work. In the industrial setting green was common for monitors and scopes, typically a P1 or P31 phosphor. Many computer makers went straight for this option. P4 or white was associated with television, since before WW2 and it was a less popular choice for computer monitors. Amber (medium persistence) was rare prior to the home computer era. Most radar amber colored screens prior to this had a very long persistence phosphor.

    In use I prefer amber as number 1 for a monochrome computer VDU, mostly because of the associations with green for test instrument applications, but green is good too. But in front of that a white (p4) phosphor screen is great for vintage computers and I think preferable to green for text on a dark background. As I recall the Apple IIc monitor came in green or white. I converted the one I had to white with a P4 suffix CRT.

    In a monochrome CRT, the resolution is only limited by the size of the focused beam and the frequency response of the video amplifier & output stage driving the gun. The amber monitor in a 5155 has a very small spot size and the video output stage is good to over 8MHz bandwidth (monochrome TV video output stages are generally good to 4 to 5MHz). As a result the image on the amber CRT is as sharp as a tac and exceeds the resolution of a shadow mask limited color CRT. In fact because the response is so good, it is a disadvantage to feed the IBM5155's monitor (or any monochrome monitor) with a composite color signal. The color sub-carrier interferes with the resolution and produces a patterning that is better not there. This can be fixed by disconnecting the sub-carrier signal mixing resistor on the CGA card, or by not using the sub-carrier on a feature adapter when using an EGA card in the 5155

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