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The SRF-39 is a portable AM/FM radio introduced in approximately 1992 by Sony. [1] 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.
An early 2000s transistor radio (Sony Walkman SRF-S84 transistor radio, released 2001, shown without earphones) Rock 'n roll music became popular at the same time as transistor radios. Parents found that purchasing a small transistor radio was a way for children to listen to their music without using the family tube radio.
When the TR-55 was released in Japan in August 1955, [3] 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. [4] In the autumn of 1955, Morita met with a representative of the Bulova watch company in New York City. Bulova ...
Sony's next model, the NW-HD5, was announced in April 2005 and released July 2005 [35] and was an updated design from the HD1 / HD3, boasting a simpler control system, an upright handheld format, [36] a user-removable lithium-ion battery, better file format compatibility, a unique "Follow Turn Display" that would automatically align itself ...
The RCA model R7 Superette superheterodyne table radio. This is a list of notable radios, which encompasses specific models and brands of radio transmitters, receivers and transceivers, both actively manufactured and defunct, including receivers, two-way radios, citizens band radios, shortwave radios, ham radios, scanners, weather radios and airband and marine VHF radios.
Sony applied the "Walkman" brand to some transistor radios starting with the matching blue SRF-40 FM Walkman in 1980, [17] and added a radio system to some Walkman cassette models starting with the model WM-F1 in 1982. [18] The first model with Dolby noise-reduction system and an auto reverse function appeared in 1982. [19]
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