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Motorola SCR-300 circa 1940. The SCR-300 was a portable radio transceiver used by US Signal Corps in World War II. This backpack -mounted unit was the first radio to be nicknamed a "walkie talkie". [1]
The SCR-536 weighed 5 pounds (2.3 kg) with batteries and 3.85 lb (1.75 kg) without batteries. The unit operated in AM voice mode between 3.5 and 6.0 MHz frequency range on any one of 50 channels. Plug in crystals and coils were used to control the frequency of the receiver and transmitter. The antenna was a 40 inch telescoping rod that slid ...
Motorola was founded in Chicago, Illinois, as Galvin Manufacturing Corporation (at 847 West Harrison Street) [9] in 1928.. Paul Galvin wanted a brand name for Galvin Manufacturing Corporation's new car radio, and created the name "Motorola" by linking "motor" (from motor car) with "ola" (from Victrola), which was also a popular ending for many companies at the time, e.g. Moviola, Crayola. [10]
A walkie-talkie, more formally known as a handheld transceiver ( HT ), is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings, radio engineer Alfred J. Gross, Henryk Magnuski and engineering teams at Motorola. First used for infantry, similar designs were ...
Motorola T5320 FRS handheld radio. The Family Radio Service ( FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies around 462 and 467 MHz in the ultra high frequency (UHF) band. It does not suffer the interference effects found on citizens' band (CB ...
Detrola Silvertone 6402 (1937) radio, made of Bakelite. The Detrola Radio & Television Corporation was an American manufacturer of radios. [1] Founded in Detroit in 1931 by John J. Ross, Detrola became a brand of affordable radios in the midst of the Great Depression. [2] They may well have been the world's most prolific manufacturer of private ...
Cooper worked at Motorola for 29 years; building and managing both its paging and cellular businesses. He also led the creation of trunked mobile radio, quartz crystal oscillators, liquid crystal displays, piezo-electric components, Motorola A.M. stereo technology and various mobile and portable two-way radio product lines.
Midland Radio Corporation was established in 1959 in Kansas City, Missouri, US. Midland Radio Corporation and is owned by private investors. Midland is the oldest U.S. manufacturer of CB radios. [citation needed] In the 1990s, CTE International acquired a significant share of Midland Radio Corporation.
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