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EF50. In the field of electronics, the EF50 is an early all-glass wideband remote cutoff pentode designed in 1938 by Philips.It was a landmark in the development of vacuum tube technology, departing from construction techniques that were largely unchanged from light bulb designs. [1] Initially used in television receivers, it quickly gained a vital role in British radar, and great efforts were ...
EF50 is a vacuum pentode tube developed by Philips in 1938/39 for TV and radar applications. Learn about its features, variants, prices, and usage in various models and collections.
EF50 is a red valve designed by Philips in 1938 for Band I television receivers and widely used in radio and radar during WWII. Learn about its history, pin connections, datasheet and applications.
Learn how the EF50, a glass pentode tube developed by Philips in 1938, revolutionized high-frequency applications such as television and RADAR. Discover its history, construction, and impact on radio technology.
The EF50 in contrast had, like all "modern" radio tubes, a base made from pressed glass. This enabled the designers at Philips to combine superior performance with a low-cost high volume production technology in a single tube. Several accounts of the history of the EF50 have been given, both in literature as well as on the Web [1].
The success of this "One Valve EF50 Radio" project also depends very much upon the quality of the pre-used valve one receives from the seller. One should realise that valves do not operate forever, because they have a finite number of hours of use. Consequently, their reliability usually follows the familiar bathtub curve.
The two tubes employed by the set were the EF50, which were probably available in large supply from surplus equipment.The tube, which has been called "the Tube that helped to Win the War," was a major concern during the early days of the war.It was very versatile with uses in VHF and radar equipment. And it was manufactured by Philips in Holland, which was about to be overrun by the Nazis.
EF50/1.8STM. As low as $125.99. In Stock. Compact, lightweight fixed focal length lens ideal for everyday photos, and with a large f/1.8 aperture, a perfect lens for low-light photography and creative background blur. 80mm effective focal-length when attached to an APS-C camera, optimal for portraits and photos of fast moving subjects such as ...
Manufacturer description: The Canon EF 50mm f/1.8 STM prime lens enables you to capture images with subjects that pop from the scene, or create impact with beautiful background blur. The successor to the incredibly popular EF 50mm f/1.8 II, and an ideal second lens for anyone looking to take their photography to the next level, the EF 50mm F/1.8 STM excels at portraiture, low-light photography ...
One of the most versatile focal lengths available, the EF 50mm f/1.8 STM Lens from Canon is a compact, normal-length prime well-suited to everyday shooting. The bright f/1.8 maximum aperture benefits working in difficult lighting conditions and also affords increased control over depth of field for isolating subject matter.