The Llanidloes transmitting station is a broadcasting and telecommunications facility consisting of a self-supporting 23 m lattice mast erected on land that is itself about 245 m above sea level about 1 km to the west of the town of Llanidloes in Powys, Wales. It was originally built by the BBC, entering service just before Christmas 1966 transmitting the now-defunct 405-line VHF television system. Transmissions of the original three FM radio services began in February 1967.