The radio station was developed during WWII by the Office of Strategic Services. After the war, some intelligence groups working out of the territory of Czechoslovakia for the American CIA, including the Group of Jaromir Nechansky, commander of the PLATINUM airdrop, one of the leaders of the Prague Uprising in the war years, were equipped with this type of station. He was arrested in September 1949 and executed in June 1950 for treason and espionage.