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A Walkman FM/AM radio receiver from the 2000s Sony branded portable radio receivers with the "FM Walkman" name starting with the SRF-40 in 1980. [ 7 ] Various FM , AM and DAB receivers have been made.
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.
The typical portable tube radio of the fifties was about the size and weight of a lunchbox and contained several heavy, non-rechargeable batteries—one or more so-called "A" batteries to heat the tube filaments and a large 45- to 90-volt "B" battery to power the signal circuits. By comparison, the transistor radio could fit in a pocket and ...
SRF-39 – a portable AM/FM radio introduced in approximately 1992 by Sony. [4] It uses a single AA battery, as its analog electronics draw very little current. 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. [4] [5] [6]
A major component of the Walkman advertising campaign was overspecialization of the device. Prior to the Walkman, the common device for portable music was the portable radio, which could only offer listeners standard music broadcasts. [35] Having the ability to customize a playlist was a new and exciting revolution in music consumption.
Because of this it is used by radio amateurs, outdoorsmen and professional users worldwide, outputting about a 4 watt FM signal. [ 2 ] [ 3 ] Due to Ofcom regulations, a variety of Baofeng radios ranging from UV-5R to the UV-21 are not able to transmit in the United Kingdom between 480 MHz and 520 MHz despite being advertised to transmit between ...