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Beginning around 1980, however, cheap AM transistor radios were superseded initially by the boombox and the Sony Walkman, and later on by digitally-based devices with higher audio quality such as portable CD players, personal audio players, MP3 players and (eventually) by smartphones, many of which contain FM radios.
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.
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 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.
The (American version) radio's main receiver covers 30 kHz through 60 MHz, 142 MHz through 152 MHz, and 420 through 450 MHz (plus 1240 through 1300 MHz with the "X" model). The sub-receiver tunes between 118 and 174 MHz, and from 220 to 512 MHz (VFO ranges).
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 final letter(s) indicate the mode (AM or FM). For example, 27.185 MHz AM (Channel 19 in the European/American frequency plan) would be designated "C19EA" or "C19EAM". 27.180 MHz FM (Channel 19 on the Polish assignment) would be designated "C19PF" or "C19PFM". The B-C-D (or "grid") designation comes from common export radio band labeling.
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