CRT DisplaysBack in the day, the only kind of monitor available was a CRT type, be it computer, T.V., cockpit displays, oscilloscopes, etc. They were big, bulky and weighed a ton! And they used a lot of power.
If I left my small, color T.V. on in the morning, I’d come home from school later that day to find the temperature in my room about five degrees warmer than the rest of the house (I kept the door closed because my mom hated looking at the mess in my room. She could have made me clean it up, but she picked her battles wisely, and that wasn’t one of them. A story for a different day perhaps….).
CRT Displays and CRT Power Supplies
Fifteen or twenty years ago, VMI used to sell a lot of high voltage multipliers to a well-known maker of oscilloscopes. The ‘scopes were analog back then. The company had their own version of CRT power supplies, and we supplied the high voltage section.
|CRS Series - High Voltage CRT Power Supplies|
From the outside, the high voltage sections looked like a big, black brick with an anode connector on one end, and flying leads on the other. They weighed as much as a brick too.
Most CRTs and CRT power supplies have a couple of things in common. In a high voltage module, there can be various voltage or current taps, feedback networks, and such, but they all have an anode, a cathode, and one or more electrodes.
Anodes are used to accelerate electrons, cathodes are used as the source of electrons, and electrodes are used to focus the electrons. The stream of electrons form an electron beam, which is directed to a luminescent screen. The beam is directed either by electric or magnetic deflection, depending on the application and size of the monitor.
All in all, it’s pretty complicated, but well-established. The whole process happens extremely fast, and repeats continuously.
|Image Credit: Mediahex|
LCD and CRT Displays
These days, LCD screens are more common. They are less expensive, less bulky, and lightweight. They are not without trade-offs though. They do not have the color fidelity that CRT type displays have, and they are not as responsive.
In comparison to CRT types, they are limited in the number of colors available. CRTs are great for high-end applications needing a wide range of colors, deep blacks, accurate color rendition, speed, and fidelity. For most CRTs, you need a CRT power supply.
CRS Series of High Voltage CRT Power SuppliesAnyway…..when it comes to CRT type power supplies, VMI makes the best. Our CRS series is adjustable up to 18kV (anode voltage), and ranges from zero to 550uA (anode output current).
The CRS series features very low ripple (no noise or fuzziness in your display), excellent regulation (no droopy signals), and is arc & short circuit protected.
Two RoHS compliant models are available, and, as always, guaranteed. The standard power supplies feature an insulated high voltage leads.
If you need a custom lead, send us your spec. We may be able to customize your power supply. VMI is ISO9001:2008 certified.