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Antennas on Mount Wilson, covered in ice. Where terrain and road access allows, mountaintop sites are very attractive for non-AM broadcast stations and others, because it increases the stations' height above average terrain, allowing them to reach further by avoiding obstructions on the ground, and by increasing the radio horizon.
Bell Labs' horn antenna, April 2007. The horn antenna at Bell Telephone Laboratories in Holmdel, New Jersey, was constructed on Crawford Hill in 1959 to support Project Echo, the National Aeronautics and Space Administration's passive communications satellites, [8] [5] which used large aluminized plastic balloons (satellite balloon) as reflectors to bounce radio signals from one point on the ...
Sun Television and Appliances was a speciality retailer of consumer electronics, home appliances, and office equipment founded in 1949 by brothers Macy and Herbie Block. The company had stores in cities throughout the midwest, and also operated stores in rural areas of the United States, where there was no other competition [1] in Ohio, Indiana, New York, Pennsylvania, Maryland, West Virginia ...
MFJ Enterprises was an American manufacturer specializing in a wide range of products for the amateur radio market. The company focuses on station accessories, including antenna tuners and antenna switching equipment. MFJ was founded in 1972 by Martin F. Jue. As of 2014, the company was recognized as the largest producer of amateur radio ...
Mount Wilson aerial photo, showing Radio Ridge antenna farm and the Observatory. Photo by Doc Searls. In 1889, Professor William Pickering of Harvard University, along with telescope-maker Alvan Clark, prepared an experiment with 4-and-13-inch (102 and 330 mm) telescopes at Mount Wilson. University students would operate the telescopes for ...
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E-plane plate lens antenna of the target tracking radar for the US Air Force Nike Ajax anti-aircraft missile, 1954 Dielectric lens/horn antenna in the Atacama Millimeter Array radio telescope A lens antenna is a directional antenna that uses a shaped piece of microwave -transparent material to bend and focus microwaves by refraction , as an ...
Panorama Antennas Ltd. was founded in 1947, under the name of J.F.J. Products, by a group of ex-servicemem, including Leon Jesman. J.F.J. was a light engineering company that manufactured a diverse range of products from mop heads to Perspex cake stands to the kind of dolls’ eyes that close when the toy is laid flat.
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