The radio station in Grimeton near Varberg on the Swedish southwest coast, together with 20 other systems of this type, formed a global radio network from 1925 onwards.
The RDA Russian Districts award program and the corresponding RDA Contest have been attracting radio amateurs in Russia and in other countries of the world for over 20 years.
Presentation covers radio technology development from the Maxwell's mathematical description of electromagnetic waves in 1860-1865, Hertz's development of a crude spark transmitter and spark receiver that proved the existence electromagnetic waves in 1886-1888
The summer in Europe is the period when many brave people visit the small islet called Märket, located between Finland and Sweden in the Baltic Sea. The locals know this part of the Baltic Sea as Ålandshav, the Sea of Åland.