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TR-55
The TR-55, released in 1955, was both Japan's and Sony's first commercially available transistor radio. The use of transistors allowed the device to be much smaller than earlier vacuum tube radios. History Akio Morita and Masaru Ibuka, then operating under the business name Tokyo Tsushin Kogyo, had been working on plans to introduce a transistor radio to the market since 1953. The first model, released in 1955, was called TR-52, but was pulled from the market before it had even been introduced after climbing summer temperatures made the front lattice section gradually peel away from the black cabinet, forcing the company to build a new model using a more durable material. When the TR-55 was released in Japan in August 1955, it was the first transistor radio marketed in that country. The TR-55 featured the Sony name, but the company did not officially change its name to Sony until January 1958. In the autumn of 1955, Morita met with a representative of the Bulova watch company in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Transistor Radio
A transistor radio is a small portable radio receiver that uses transistor-based circuitry. Previous portable radios used vacuum tubes, which were bulky, fragile, had a limited lifetime, consumed excessive power and required large heavy batteries. Following the History of the transistor, invention of the transistor in 1947—a semiconductor device that amplifies and acts as an electronic switch, which revolutionized the field of consumer electronics by introducing small but powerful, convenient hand-held devices—the Regency TR-1 was released in 1954 becoming the first commercial transistor radio. The mass-market success of the smaller and cheaper Sony TR-63, released in 1957, led to the transistor radio becoming the most popular electronic communication device of the 1960s and 1970s. Billions had been manufactured by about 2012. The pocket size of transistor radios sparked a change in popular music listening habits, allowing people to listen to music and other broadcasts o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sony
is a Japanese multinational conglomerate (company), conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (imaging and sensing), Sony Entertainment (including Sony Pictures and Sony Music Group), Sony Interactive Entertainment (video games), Sony Financial Group, and others. Sony was founded in 1946 as by Masaru Ibuka and Akio Morita. In 1958, the company adopted the name Initially an electronics firm, it gained early recognition for products such as the TR-55 transistor radio and the CV-2000 home video tape recorder, contributing significantly to Japan's Japanese economic miracle, post-war economic recovery. After Ibuka's retirement in the 1970s, Morita served as chairman until 1994, overseeing Sony's rise as a global brand recognized for innovation in consumer electronics. Landmark products included the Trinitron color television, the Walkma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Tokyo Tsushin Kogyo
is a Japanese multinational conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (imaging and sensing), Sony Entertainment (including Sony Pictures and Sony Music Group), Sony Interactive Entertainment (video games), Sony Financial Group, and others. Sony was founded in 1946 as by Masaru Ibuka and Akio Morita. In 1958, the company adopted the name Initially an electronics firm, it gained early recognition for products such as the TR-55 transistor radio and the CV-2000 home video tape recorder, contributing significantly to Japan's post-war economic recovery. After Ibuka's retirement in the 1970s, Morita served as chairman until 1994, overseeing Sony's rise as a global brand recognized for innovation in consumer electronics. Landmark products included the Trinitron color television, the Walkman portable audio player, and the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Regency TR-1
The Regency TR-1 was the first commercially manufactured transistor radio, introduced in 1954. Despite mediocre performance, about 150,000 units were sold, due to the novelty of its small size and portability. Previously, transistors had only been used in military or industrial applications, and the TR-1 demonstrated their utility for consumer electronics, offering a prescient glimpse of a future full of small, convenient hand-held devices that would develop into calculators, mobile phones, tablets and the like. Surviving specimens are sought out by collectors. Conception Bell Labs invented the transistor in 1947. Despite its much smaller size and power usage compared to the vacuum tube, by 1954 the transistor had not replaced tubes in consumer electronics except in hearing aids, because of the new component's high cost of $20, compared to $1 for a tube. In May 1954, Texas Instruments (TI), previously a producer of instrumentation for the oil industry and locating devices for the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
History Of Radio
The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy". Later radio history increasingly involves matters of broadcasting. Discovery In an 1864 presentation, published in 1865, James Clerk Maxwell proposed theories of electromagnetism and mathematical proofs demonstrating that light, radio and x-rays were all types of electromagnetic waves propagating through free space. Between 1886 and 1888 Heinrich Rudolf Hertz published the results of experiments wherein he was able to transmit electromagnetic waves (radio waves) through the air, proving Maxwell's electromagnetic theory. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
1955 In Radio
The year 1955 saw a number of significant events in radio broadcasting history. Events *2 May – Opening at Wrotham transmitting station, Wrotham, Kent, of the United Kingdom's first Very high frequency, VHF/Frequency modulation, FM transmitters. *September (Labor Day weekend) – First Sig Alert broadcast in California. *22 September – The character Grace Archer dies in the BBC radio serial ''The Archers''; a spoiler for the launch of ITV (TV network), ITV in the UK on the same day. *20 October – Disc jockey Bill Randle of WERE (Cleveland) is the key presenter of a concert at Brooklyn High School (Ohio), featuring Pat Boone and Bill Haley & His Comets and opening with Elvis Presley, not only Elvis's first performance north of the Mason–Dixon line, but also his first filmed performance, for a documentary on Randle titled ''The Pied Piper of Cleveland''. *17 November – Creation of the ''Communauté des radios publiques de langue française'' (CRPLF) - an association of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Models Of Radios
A model is an informative representation of an object, person, or system. The term originally denoted the plans of a building in late 16th-century English, and derived via French and Italian ultimately from Latin , . Models can be divided into physical models (e.g. a ship model or a fashion model) and abstract models (e.g. a set of mathematical equations describing the workings of the atmosphere for the purpose of weather forecasting). Abstract or conceptual models are central to philosophy of science. In scholarly research and applied science, a model should not be confused with a theory: while a model seeks only to represent reality with the purpose of better understanding or predicting the world, a theory is more ambitious in that it claims to be an explanation of reality. Types of model ''Model'' in specific contexts As a noun, ''model'' has specific meanings in certain fields, derived from its original meaning of "structural design or layout": * Model (art), a pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
SRF-39
The SRF-39 is a portable AM/ FM radio introduced in approximately 1992 by Sony. It uses a single AA battery, as its analog electronics require very little voltage. It was one of the first radios to use the CXA1129 30-pin integrated circuit, which later was responsible for the SRF-39's sensitive and selective performance.T. Okanobu, H. Tomiyama and H. Arimoto"Advanced low voltage single chip radio IC" IEEE Transactions on Consumer Electronics, vol. 38, no. 3, pp. 465-475, Aug. 1992, doi: 10.1109/30.156724. A variant of the SRF-39, the SRF-39FP, has a transparent case, designed to thwart contraband concealment. The radio often appears on the commissary lists of U.S. federal prisons, hence the "FP" suffix. The SRF-39 was followed by the SRF-49 in 1997, the PSY-03 in 1999, and the SRF-59 in 2001. These radios are popular in the DXing community due to their sensitivity, selectivity and ferrite antennas. See also *History of radio The early history of radio is the history of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gram
The gram (originally gramme; SI unit symbol g) is a Physical unit, unit of mass in the International System of Units (SI) equal to one thousandth of a kilogram. Originally defined in 1795 as "the absolute Mass versus weight, weight of a volume of pure water equal to Cube (algebra), the cube of the hundredth part of a metre [1 Cubic centimetre, cm3], and at Melting point of water, the temperature of Melting point, melting ice", the defining temperature (0 °C) was later changed to the temperature of maximum density of water (approximately 4 °C). Subsequent redefinitions agree with this original definition to within 30 Parts-per notation, parts per million (0.003%), with the maximum density of water remaining very close to 1 g/cm3, as shown by modern measurements. By the late 19th century, there was an effort to make the Base unit (measurement), base unit the kilogram and the gram a derived unit. In 1960, the new International System of Units defined a '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Lincoln Motor Company
Lincoln Motor Company, or simply Lincoln, is the luxury vehicle division of American automobile manufacturer Ford Motor Company. Marketed among the top luxury vehicle brands in the United States, Lincoln is positioned closely against its General Motors counterpart Cadillac. However, starting with the 2021 model year, they only offer SUV and crossover vehicles. The division helped to establish the personal luxury car segment with the 1940 Lincoln Continental. Lincoln Motor Company was founded in 1917 by Henry M. Leland, naming it after Abraham Lincoln. In February 1922, the company was acquired by Ford, its parent company to this day. Following World War II, Ford formed the Lincoln-Mercury Division, pairing Lincoln with its mid-range Mercury brand; the pairing lasted through the 2010 closure of Mercury. At the end of 2012, Lincoln reverted to its original name, Lincoln Motor Company. Following the divestiture of Premier Automotive Group ( Jaguar, Land Rover, Aston Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
