Longwave

:Longwave can also refer to the economics concept of Kondratiev waves, also called cycles, surges, or K-waves, or to the rock band Longwave.

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Longwave radio frequencies are those below 500 kHz, which correspond to wavelengths longer than 600 meters. They have the property of following the curvature of the earth, making them ideal for continuous, continental communications. Unlike shortwave radio, longwave signals do not reflect or refract using the ionosphere, so there are fewer phase-caused fadeouts. Instead, the D-layer of the ionosphere and the surface of the earth serve as a waveguide directing the signal.

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The earliest radio transmitters, including the Alexanderson alternator, were all longwave transmitters.

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Kondratiev waves: redirect Kondratiev wave...

Longwave: :Longwave can also refer to the economics concept of Kondratiev waves, also called cycles, surges, or K-waves, or to the rock band Longwave....

Radio: Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of light....