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Philco Socket Power A & B Battery Eliminators - 1925 August brochure Philco Model B-60 "B" Socket Power Battery Eliminator - August 1925 Until the mid- to late-1920s, all radios except crystal sets were powered by vacuum tube batteries which were expensive, needed frequent charging, and leaked battery acid , reducing the wife approval factor in ...
Chrysler and Philco announced an all-transistor car radio in the April 28, 1955, edition of the Wall Street Journal. [1] This Philco car radio model was the first tubeless auto set in history to be developed and produced. [2] It was a $150 option for 1956 Chrysler and Imperial cars and hit the showroom floor on October 21, 1955. [3] [4] [5]
High-power RF power tubes are directly heated; the heater voltage must be much smaller than the signal voltage on the grid and is therefore in the 5...25 V range, drawing up to hundreds of amperes from a suitable heater transformer. In some valve part number series, the voltage class of the heater is given in the part number, and a similar ...
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.
The TRANSAC S-2000/Philco 210/211 weighed about 2,000 pounds (910 kg). [19] By 1964, eighteen Model 210, eighteen Model 211 and seven Model 212 systems had been sold. [12] After Philco was purchased by Ford Motor Company, the Model 212 was introduced in 1962 [20] and released in 1963. It had 65,535 words of 48-bit memory.
Bendix Corporation is an American manufacturing and engineering company which, during various times in its existence, made automotive brake shoes and systems, vacuum tubes, aircraft brakes, aeronautical hydraulics and electric power systems, avionics, aircraft and automobile fuel control systems, radios, televisions and computers.
(The Center Square) – While many states expanded and adopted school choice programs in 2024, some advocates are excited about new education options for families in 2025 – made possible because ...
Sylvania Model 4P14 (1961) radio, made of plastic Sylvania was a major manufacturer of vacuum tubes until the early 1980s Vacuum tube cartons displaying two generations of Sylvania branding SG7460 (7400 series) integrated circuit manufactured by Sylvania