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The White House, Washington DC
Valli & Valli A138-P-C - 2 15/16”
Valli & Valli A138-P-C - 2 15/16”
 (By:-Valli & Valli, Valli and Valli) Material Brass Center to Center 2 15/16 in |
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Retail: $ 0.00 Your Price: $9.90 Buy/More Info |
The Origins of Our LCD Screens and High Definiton Plasma TV in Vintage Computer Monitors
It may be amazing to current computer users who are used to small compact LCD monitors. Not only were initial computer monitors large and cumbersome but that the early monitors used by computer enthusiasts were Cathode Ray Monitors that were not color,
Initial vintage monitors were monochrome - one color only not the brilliant color displays that we take for granted today.
Some of these monochrome monitors were green or orange iridescent. Others were similar to a black and white television that is grey scale.
It is taken for granted now by young computer surfers and gamers that television was always “color”, not so.
Initially TV broadcasts were in “black and white “.
Color TV had been developed but the technology but the widespread use did not arise till the early 1970’s and even later in some areas.
The broadcasts were seen as black and white on those sets and color on color sets.
Color TVs could receive programs that were in the black and white mode as well. Sort of the backwards compatibility of the day.
What then would be the difference between the picture qualities of a television set a monitor has vastly greater resolution than standard TV sets.
The TV sets of that time (as opposed to current high end LCD and plasma high definition TVs) were basically 1950’s technology - even the newer color TV sets. .
A monitor’s screen display should be stable and of good quality, since the computer user may sit very close to the monitor and spend many hours reading the display.
If the images are fuzzy (low resolution) or waver constantly, you would have a throbbing headache and wavering eyes in no time.
Monitors have knobs to adjust for clarity. On vintage monochrome monitors these usually include a brightness knob which adjusts the illumination of the entire screen, and a contrast knob which makes the letters lighter or darker in relation to the background screen newer color monitors will have additional adjustments for color.
The question will arise - how did the vintage CRT (Cathode Ray Tube) monitors initially handle the color technology which came later and became the accepted standard.
A typical color monitor screen worked in much the same way as a standard CRT television.
The inside of the picture tube is coated with three different phosphors: red, green and blue.
Phosphors are special chemical compounds that glow with characteristic colors when bombarded a stream of electrons.
The phosphor gets “excited” and thanks to the additive properties of the color wheel the different colored lights resulting get mixed and that all types of combinations of the three primary colors result.
The end result is that virtually any color of the rainbow can be produced.
And as for the color white the eyes play a useful trick. When all three colors are mixed together in equal quantities, the eye sees this as “white light”.
Finally the sharpness of the CRT color monitor or a TV set’s image is determined by three factors: the monitor’s bandwidth, its dot pitch, and the accuracy of its convergence.
Although the bandwidth and dot pitch are important to determine a good monitor, convergence is the real measurement.
Indeed we have come a long way from the initial simple vintage monochrome monitors. What we now take for granted with LCD monitors and indeed our high definition TV sets all originated with simple CRT monochrome monitor technology which was merged with the technology and tricks gleaned from the color TV industry.
We should all be grateful. We owe much to “Uncle Miltie”.
About the Author
Mr. Arthur Fellon Ace Employment Services Financial Services
Interest in vintage computers
www.vintagecomputermanuals.com
www.vintageomputermanuals.com
Great Ways To Give Your Old Cabinets A New Look
Cupboards are everywhere, but regardless of their station, all cabinets serve one purpose: storage.
Some cabinets require less usage. A curio cabinet or trophy case is a good example of this particular cabinet. We put items in these cabinets that we want to look at on a regular basis, but we don?t tend to use these cabinets very often. We don?t open and close them very much. However, some cabinets see a lot of action. Kitchen and bathroom cabinets get lots of action. It doesn?t really matter what you have in your cabinets. What is important is to realize that sooner or later, you will have to make some minor repairs to keep your cabinets looking great.
Probably, the most expense way to restore old cabinets is to remove and replace. Be aware, though, that there are several issues to consider when buying new cabinets. Wood will obviously cost more than most other materials. However, it is usually more attractive and longer lasting. The overall design of the cabinets as well as the number of cabinets will also play a large factor in the price of the cabinets. As the artistry or architecture of the cabinet gets more complicated, the price rises. For example, a simple flat door design may cost as little as $40 per door, whereas a more complicated door with even a few etchings may be as much as $100 per door. Design matters when you are on a tight budget.
Refacing is another way to restore old cabinets without ?tearing down the house?. This process only involved the removal and replacement of the facing of the drawers and cabinets and does not involve removing any of the frame work. The cost for such a renovation is substantially lower than new cabinets, and the finished product is produced much quicker. Refacing can be performed in approximately three days, whereas complete replacement of cabinets can take as long as a couple of months. However, just as in replacement cabinetry, extricate design will cost more.
If your budget does not allow for the replacement or restoration of new cabinets, there are still things you can do to make your cabinets look new again. New knobs and drawer pulls are relatively inexpensive and can make a world of difference in the overall look and feel of the cabinetry. If you don?t get quite the look you were after, try also replacing the hinges. New hinges will also make your cabinet doors look better and brighter.
For a little more money, try painting or refinishing your wooden cabinets. You don?t have to remove all the old paint or stain before repainting or staining. You can sand the cabinets and drawers (everything that can be seen) just enough for paint or stain to stick to it. (Read the directions carefully if you choose to restain. Staining may require extra preparation.) If you are painting, be sure to you a primer before applying the final coat of paint. This will ensure that the paint will adhere to the cabinetry.
About the Author:
You will find more from this author at: homeandgarden-mag.com
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