Vigra transmitter was a transmitter facility for medium wave broadcasting near Vigra in Norway. The Vigra transmitter was inaugurated by the Norwegian Broadcasting Corporation (NRK) in 1934. It was used until 1953 for transmission with a T-antenna. This antenna was replaced in 1952/53 by a guyed, steel-tube mast radiator insulated against the earth with a height of 243 metres (797 ft). In 1999, the height of the mast was reduced for air traffic safety reasons to 232 metres (761 ft).