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Another first for portable radios was the unique dial scale used in the 1000 and later series of Trans-Oceanics. The 1000 was designed with a cylinder dial scale that would rotate with the band switch allowing only that particular band scale to show. [9] Zenith Royal 1000 All Transistor Trans-Oceanic Short Wave Portable Radio, circa 1957.
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 ]
The 1L6 was to be a specialty tube, produced in small quantities by very few manufacturers, mostly Sylvania for use by just a few manufacturers of shortwave portables, such as Zenith - in their Trans-Oceanics - and its short-lived rivals, such as the Hallicrafters TW-1000 and the RCA Strat-O-World and very few others. In fact, Zenith, Crosley ...
Vintage Zenith Trans-Oceanic Vacuum Tube Radio, Model G-500, Circa 1949: Date: 30 June 2014, 05:28: Source: Vintage Zenith Trans-Oceanic Vacuum Tube Radio, Model G-500, Circa 1949: Author: Joe Haupt from USA
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.
Tubes used in AC-powered radio receivers of the early 1930s 2A3 – Directly heated power triode, used for AF output stages in 1930s–1940s audio amplifiers and radios. 2A5 – Power Pentode (Except for heater, electronically identical to types 42 and 6F6) 2A6 – Dual diode, high-mu triode (Except for heater, electronically identical to type 75)
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Consumer console radios were made by RCA, Philco, General Electric, Montgomery Ward (under the Airline brand name), Sears (under the Silvertone brand name), Westinghouse, Motorola, Zenith and others. Brands such as Zenith made a few high priced models ("Stratosphere") mainly produced moderately priced radios [ citation needed ]