Transmitting devices for broadcasting in Amplitude Modulation mode (AM), set up in Siziano (Pv) by EIAR. Operative from 1932 to 1971

This apparatus was created to send out the signal coming from the broadcasting studios in Milano. Thanks to a valve system the transmitter generated strong radio waves. These waves were modulated on the voices of the speakers picked up by the microphones placed in the EIAR offices in via Gorradini, Milano. The signal from the studios arrived in Siziano through a cable and was combined with the signal generated by the transmitter. The radiophonic signals obtained from this process were then sent out through a large antenna, consisting of two 100 metres tall pylons. Such signals could be received in all of northern Italy. The Italian State monopoly of radio communications starts in 1924 with the birth of the Unione Radiofonica Italians (URI), which develops into the Ente Italiano Audizioni Radio in 1928 and finally into the Radio Audizioni Italiane (RAI) in 1946. The station in Siziano was the eleventh EIAR station. It was promoted by the fascist government, that used the radio as a strong vehicle for propaganda. In 1971 the valve device was substituted by a new generation transmitter. The Siziano station is now the last station in northern Italy transmitting Rai Radiouno broadcastings through medium waves (900 kHz) in amplitude's modulation (AM).