Moniror crt: what it means, features and assembly

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Selection guide, main features and assembly of a computer CRT monitor, also commonly known as a cathode ray tube screen.


CRT cathode ray tube monitor for pc

By now CRT (Cathode Ray Tube) or cathode ray tube monitors have fallen into disuse in favor of the more modern, less bulky and lighter LCD monitors.

In some cases, however, they are still used and preferred by a professional user (especially in the field of graphic processing).


The most variables in choosing a crt monitor are the screen size in inches, an English unit of measurement for measuring the length of the screen diagonal.

In this regard, it should be noted that this measurement is that of the screen without a plastic container and therefore the actual effective visible area will be less (about an inch).

The cathode ray tube is the main component of a CRT monitor and consists of an empty tube with one or more electron cannons placed on the bottom.


Each cannon emits a beam of electrons which are projected onto the screen by deflectors.

The screen is in fact equipped with a photosensitive layer which is excited by the electrons in such a way as to illuminate and produce the image.

An important factor is the Pixel rate which indicates the maximum output frequency of the PC video card at the maximum resolution and vertical refresh rate supported by the monitor.


The higher this value the better it is to decrease eye strain in front of the screen. To give an example let's say that a good 17-inch CRT monitor must work at the resolution of 1024 × 768 pixels with a vertical refresh rate of not less than 85 Hz.

Another factor to consider is the Dot Pich which indicates the measurement of the distance expressed in millimeters between two points of the same color in a color cathode ray tube.

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The dot pich values ​​generally range from 0.28 mm to 0.24 mm and smaller values ​​are preferable.

The assembly of a monitor is not difficult at all, just connect the plug to the network and the vga cable to the video card of the pc to put it into operation immediately.

More attention must be paid to the correct positioning with diffused light around, away from heat sources and with at least 20 cm of space above and on the sides to promote air circulation avoiding overheating of the appliance.

The CRT monitors, currently no longer in production, had reached an average life of several years.

The recommended refresh rate for less eye strain on the 17-inch screen size, the one most commonly used per pc, is 100 Hz.

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