Medium wave
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Medium wave is a part of the medium frequency radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broa
Typical mast radiator of a commercial medium wave AM broadcasting station, Chapel Hill, North Carolina, U.S.
Realistic TM-152 AM stereo tuner c. 1988
Multiwire T antenna of radio station WBZ, Massachusetts, USA, 1925. T antennas were the first antennas used for medium wave broadcasting, and are still used at lower power.
Longwave
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In radio, longwave is the part of the radio spectrum with wavelengths longer than what was originally called the medium-wave broadcasting band. The term is historic, dating from the early 20th century
Medium wave
…The term is a historic one, dating from the early 20th century, when the radio spectrum was divided on the basis of the wavelength of the waves into long wave (LW), medium wave, and short wave (SW) radio bands. For Europe, Africa and Asia the MW band consists of 120 channels with carrier frequencies from 531…
Tuning dial on 1946 Dynatron Merlin T.69 console radio receiver, showing LW wavelengths between 800 and 2000 metres (375–150 kHz)