Grimeton VLF transmitter
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How it came to be
At Grimeton, about 7 km east of Varberg on Sweden's west coast, a station for transatlantic radio telegraphy was built in 1922-1924. The architect Carl Åkerblad designed its buildings in a Neo-Classical style, and it began transmitting on 1 December 1924.
At its heart is a 200-kilowatt high-frequency alternator developed by the engineer Ernst Alexanderson (1878-1975). It sent long waves of about 17.2 kHz from an antenna carried by six 127-metre steel towers set 380 metres apart in a straight line, then the tallest structures in Sweden.
The station was in regular use until the 1960s and has been kept in working order since. It is the only large Alexanderson station left, and it still sends telegrams with the call sign SAQ on days such as Christmas Eve. It was inscribed in 2004.
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