Questions tagged [crt-monitor]
Cathode Ray Tube monitors: principles of operation and use with computing devices. DO NOT REPAIR CRTs; SEE TAG WIKI FOR DETAILS.
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Why did CGA RGBI output leave DAC to the monitor?
CGA on the original IBM PC produced sixteen colors, one bit each for red, green, blue and overall intensity modifier.
The preferred output device was the later-arriving 5153 color monitor, which ...
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What's the difference between an IBM 5153 (CGA) CRT picture tube and a color TV picture tube?
The IBM 5153 Personal Computer Color Display was a monitor designed to accompany the original IBM PC (albeit released a couple of years later) and provide a color display at sharp enough resolution ...
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Was the picture area of a CRT a parallelogram (instead of a true rectangle)?
This may seem like an absurd question at first, but I've been giving it some thought and I'm genuinely curious about the design details of these devices.
I was reading an answer on an unrelated Stack ...
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How were early computer monitor signals used to breach security? [duplicate]
In the mid 80's, several national news outlets showed people able to reproduce a computer's monitor's screen at least 100ft away.
1) How were early computers compromised like this?
2) Were there ...
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First Commodore 80-column monitor
While the Amiga could be used with a TV in a pinch, it was primarily intended for use with an RGBA monitor; memory says, and Google seems to confirm, that was the 1084.
Commodore made color monitors ...
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What were other colors beside green and amber for monochrome monitors?
In a movie that unfortunately I don't remember the name of, a monochrome monitor using red shade was visible. I found that quite fascinating back then !
Beside green, amber and apparently gray, were ...
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Why the exterior of PC towers and monitors used to be white in the 90's and now is black? [closed]
White got dirty pretty quick. Why would they chose that color?
And why MAC still keep it but other manufacturers do not.
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Retro emulation with perfect V-sync
I'm building an retro emulator to connect to a PAL (720x576i @ 50 Hz) CRT TV, and would like a perfect V-blank image, so the visuals are identical to original arcades and retro computers.
In other ...
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CRT contrast issue: light grey on dark grey
This is on an IBM 5154.
Dark grey next to light grey produces a white line between the two. This is noticeable on a color bar test, but is even worse in SimCity (making the text impossible to read).
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Fixing the horizontal size(width) of an old CRT monitor (Zenith ZCM 1390-E)
This is my first post. I looked around on the net for awhile and came across this board - looks to be the most competent, so here goes.
I managed to get my hands on an old computer monitor from my ...
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Spying on old computer monitor RF signals [closed]
In the mid 80's, several national news outlets showed people able to reproduce a computers monitors screen at least 100ft away. How were early computers compromised like this?
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Safely adjusting CRT while it's on?
I have an old IBM 5154 monitor that works pretty well. It only has two issues: the screen is off-center and the color is too blue. I found a service manual for it that describes how to fix both of ...
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Why does my IBM 5154 have an undulating wave?
My IBM 5154 had some blown capacitors in the power supply (the AC line filters). It worked, though I decided I should replace the caps in the power supply just to be safe. I went ahead and replaced ...
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How to tell if glue or electrolyte leak from old capacitors?
I recently acquired an IBM 5154 EGA monitor that works pretty well. The only minor problem is that the screen is slightly off-center. I decided to take it apart to adjust it, but discovered that many ...
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IBM 5153 monitor vertical resolution
The IBM 5153, the color monitor accompanying the original IBM PC, was designed to work with the CGA graphics card, vertical resolution 200 scan lines. This was quite unsurprising and straightforward.
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Why not SCART for early color monitors
By the early eighties, it was starting to be considered desirable for computers to have color monitors. Home computers often made do with a TV set and accepted the consequent low resolution, but ...
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Can the wrong sync frequency really destroy a CRT monitor?
I've read in various places that an incorrect signal of the wrong refresh rate can cause physical damage to a CRT monitor, but I've never found an adequate explanation of why this is so. Is this true? ...
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Is a normal B&W TV good enough for 80-column text?
S-100 bus machines normally had displays that had 64-chars-per-line. The VDM-1 used a 7x9 format, and I think most cards used that, so that would be 448 pixels. I understand that an NTSC television ...
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Why did 80x25 become the text monitor standard?
Prior to the 1981 release of the IBM PC, the VT05 (72x20 1970), VT50 (80x12 1974), VT52 (80x24 1975), and VT100 (80x24 1978) text terminals were used on many Unix machines and the PDP-11 (probably the ...
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High Voltage in Bell of CRT Tube?
I'm going to adjust the dynamic convergence and geometry on my CRT TV with magnets. However, my dad is very reluctant as he thinks the bell of the tube may have a high voltage current and that placing ...
user7645
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Weird Brightness Problem On CRT
My Panasonic CT-20S12S keeps slowly getting brighter and brighter, and I keep having to take off the back and turn down the SCREEN control.
What's going on here?
user7645
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CRT Geometry Adjustment
My Panasonic CT-20S12S (20 inches, not 12 inches) has some pretty bad geometry in various parts of the screen. The edges of lines bow in or out, distorting shapes.
How can I adjust the geometry on ...
user7645
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Primary manufacturers of picture tubes for early monitors
Which companies were the most important manufacturers of picture tubes for monitors (both monochrome and color) in the seventies and eighties? That is, it's easy enough to find lists of monitors by ...
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What is the difference between the Commodore 1701 and the 1702?
Among the monitors offered by Commodore were the 1701 and the 1702, which, to my recollection, looked pretty much identical. Were there any cosmetic, functional, or other differences between the two?
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Timeline of progressive scan CRT resolutions
In chronological order of roughly1 increasing total pixel count (world record style), please list progressive scan raster CRT monitors (not vector monitors) that were in production (not prototypes). ...
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What monitor did Atari recommend for its 8 bit product line?
I am curious what Atari recommended to users as an appropriate monitor for their 8 bit computers (400/800/800xl/etc).
For example, my Commodore 64 pairs nicely with a Commodore manufactured 1702 or ...
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Price of early color monitor versus TV
Some computers in the seventies and eighties had the option of output to either a TV or a dedicated monitor. Suppose repurposing an existing TV isn't an option and you are going to be buying a screen ...
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Connectors for green screen versus color monitors
Consider a pair of early 14" CRT monitors, one green screen 80x25 text, one color 640x480 graphics. It seems reasonable to conjecture that both could have the same resolution; at least if you suppose ...
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Computers with integrated monitor (all-in-one form factor)
The Commodore PET had an all-in-one form factor where the monitor was fused into the rest of the computer, making a single unit, not dissimilar to some early terminals like the VT100. This is ...
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Adjusting focus for old CRT monitors
I have an old Atari SC1224 CRT which has badly lost focus over the years.
After taking the cover off, I can see various focus controls that can be adjusted by screwdriver.
Question: is there a ...
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Can I use my IBM P/N 93F0502 (circa 1992) monitor in a dual monitor setup with my modern Mac Mini or Thinkpad?
I have an old IBM monitor here and I'd like to use it as a second screen to my computer (Mac mini running Fedora or Thinkpad running Archlinux).
I plugged it into the electricity socket without a ...
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Square pixels and TV output
Another question about color computers in the days of CRT televisions!
There is a consensus that pixels should be square, and so they typically are on purpose-designed monitors. However, looking at a ...
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What is the model of the Emachines Etower 366i2's Monitor?
I've an old 1999 Emachines Etower I want to restore. I have all the original parts except for the monitor. It just isn't a complete set without it. Does anybody know the specific model of that monitor?...
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Interfacing with vintage Canon monitor
I bought a vintage Canon monitor off a friend which I'd like to interface with and use as a cool retro monitor.
The problem is that I can't find anything useful about this monitor after days of ...
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What was this Apple external CRT monitor that looked like an iMac G3?
In high school I rescued an Apple external monitor from the garbage which looked like an iMac G3, only twice as big. It was blue but I bet it came in different colors as well. It might still be in ...
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