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A 22.5 volt battery provides power, since the only way to get adequate radio frequency performance out of early transistors was to run them close to their collector-to-emitter breakdown voltage. The current drain from this battery is only 4 mA, [ 7 ] allowing 20 to 30 hours of operation, in comparison to only several hours for the portable ...
Small, battery-operated portable transistor radios to solid oak 6 ft wide hydraulic lid radiograms sporting fully automatic stackable Garrard turntables, multi-channel radios and 2-foot-wide stereo speakers were commonplace in many UK households. Open reel tape recorders and hi-fis followed.
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 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 ...
Kenwood TS-2000 (powered off) The Kenwood TS-2000 is an amateur radio transceiver manufactured by the Kenwood Corporation . [ 24 ] [ 25 ] [ 26 ] Introduced in the year 2000, the radio was known for its "all-in-one" functionality.
X100KC – a portable AM radio with turntable; 2001 – a portable AM/FM audio receiver with 8-track player (c. 1970). Commonly known as the "Spaceball". 2002 – a portable AM/FM audio receiver (c. 1972) 2003 – a pair of spherical speakers (c. 1972) 2004 – a portable AM/FM audio receiver with compact cassette recorder
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