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They were joined in 1921 by Eugene F. McDonald, [4] and Zenith Radio Company was incorporated in 1923. The fledgling company soon became known for its high-quality radios and electronic innovations. Zenith introduced the first portable radio in 1924, [ 4 ] [ 5 ] the first mass-produced AC radio in 1926, [ 5 ] and push-button tuning in 1927. [ 4 ]
Of the many products of Zenith Radio, the 'Trans-Oceanic' series of portable radios were among the most famous. [2] McDonald was a keen yachtsman and outdoorsman and wished for a portable radio that would provide entertainment broadcasts as well as being able to tune into weather, marine and international shortwave stations.
In the United States, it competed with, and ultimately lost to, the Zenith/GE system, which the FCC chose as the standard in 1961. While both systems used multiplexing to transmit the L-R stereo signal, the Crosby system used a frequency-modulated 50 kHz subcarrier, whereas the competing Zenith/GE system used an amplitude-modulated 38 kHz ...
On October 31, 1940, the first fifteen construction permits for commercial FM stations were issued, including one to Zenith for a station in Chicago at 45.1 MHz, [11] which was issued the call sign W51C. [12] It was one of the first FM stations in the United States, and is the country's oldest FM station still in operation.
Commonly found in radio, television, Cable and satellite broadcasting facilities, the IRD is generally used for the reception of contribution feeds that are intended for re-broadcasting. The IRD is the interface between a receiving satellite dish or Telco networks and a broadcasting facility video/audio infrastructure.
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A shortwave radio receiver is a radio receiver that can receive one or more shortwave bands, between 1.6 and 30 MHz. A shortwave radio receiver often receives other broadcast bands, such as FM radio, Longwave and Mediumwave. Shortwave radio receivers are often used by dedicated hobbyists called shortwave listeners.
As the first portable cassette player, the Walkman transformed the way we listened to music in a pre-Spotify era. Originally priced around $150, refurbished units or those in mint condition can ...