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World War 2 created widespread urgent need for radio communication, and foxhole sets were built by people without access to traditional radio parts. A foxhole radio is a simple crystal sets radio receiver cobbled together from whatever parts one could make (which were very few indeed) or scrounged from junked equipment. Such a set typically ...
The Zenith 'T/O' began life in October 1941 with the production of the Model 7G605 'Trans-ocean Clipper'. Priced at $75, it was introduced in January 1942 but ceased production in April 1942 as Zenith shifted their production to war-related equipment. During this short production run, some 35,000 units were produced and sales data showed that ...
Zenith Data Systems Corporation (ZDS) was an American computer systems manufacturing company active from 1979 to 1996.It was originally a division of the Zenith Radio Company (later Zenith Electronics), after they had purchased the Heath Company and, by extension, their Heathkit line of electronic kits and kit microcomputers, from Schlumberger in October 1979.
Seeing the potential in personal computers, Zenith Radio Company bought Heath Company from Schlumberger in 1979 for $63 million, [16] [17] renaming the computer division Zenith Data Systems (ZDS). Zenith purchased Heath for the flexible assembly line infrastructure at the nearby St. Joseph facility as well as the R&D assets.
Zenith Radio Nurse (1938) bakelite designed by Isamu Noguchi, Montreal Museum of Fine Arts The Radio Nurse was the first electronic baby monitor . Manufactured by the Zenith Radio Corporation , it went on sale in 1938.
The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.
Guglielmo Marconi, who built the first radio receivers, with his early spark transmitter (right) and coherer receiver (left) from the 1890s. The receiver records the Morse code on paper tape Generic block diagram of an unamplified radio receiver from the wireless telegraphy era [4] Example of transatlantic radiotelegraph message recorded on paper tape by a siphon recorder at RCA's New York ...
Each black square depicts a loudspeaker. The center speaker in the top line of the diagram is used for dialogue. The left and right speakers on either side of the center speaker are used to create stereo sound for music and other sound effects in the film. The left and right surround speakers in the bottom line create the surround sound effect.