Radio France Allouis Transmitter

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The Allouis transmitter was put into service in 1939 as the prime longwave transmitter in France. It then consisted of a four tower array and a 500 kW transmitter. It was destroyed in 1944 by the German armed forces. The station was rebuilt and put back into service in 1952 with a new 250 kW transmitter and a single 308 m tower. In 1957 the transmitter power was raised to 600 kW, then to 1000 kW in 1974 and 2000 kW in 1981 (reduced to 1000 kW at night). In 1974 the antenna was replaced; a second 350 m tower was constructed and the original tower was increased to 350 m in height. Since 1977 the station has been used to transmit Radio France programs and also to broadcast time signals from an atomic clock.