International broadcasting
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International broadcasting, in a limited extent, began during World War I, when German and British stations broadcast press communiqués using Morse code. With the severing of Germany's undersea cables, the wireless telegraph station in Nauen was the country's sole means of long-distance communication.
Guglielmo Marconi carried out the first short wave transmissions over a long distance.
Joseph Goebbels headed Nazi Germany's Ministry of Public Enlightenment and Propaganda. International broadcasting was an important element in Nazi propaganda.
Shortwave radio
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Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW). There is no official definition of the band range, but it always includes all of the high frequency band (HF), which extends from 3 to 30 MHz ; above the medium frequency band (MF), to the bottom of the VHF band.
Grundig Satellit 400 solid-state, digital shortwave receiver, c. 1986
Radio amateurs carried out the first shortwave transmissions over a long distance before those of Guglielmo Marconi.
National Panasonic R3000 analog shortwave radio receiver, c. 1965.
Portable shortwave receiver's digital display tuned to the 75–meter band