Another important episode of Motala history began in 1927, when the Swedish national Motala longwave transmitter station was built. The town marks the middle of a straight line between Sweden's two biggest cities, Stockholm and Gothenburg. Radio programs were transferred from studios in Stockholm to Motala by telephone wire. The call was "Stockholm-Motala". The transmitter operated on 191 kHz until 1962, when the transmissions were moved to Orlunda. Since 1991 there have been no longwave transmissions at all by the Swedish Broadcasting Company, but the Motala transmitter, which is a museum today, sometimes makes low power transmissions which may only be received in the Motala area.