The Mount Leinster transmitter is owned and operated by 2RN and at  ASL. It is the highest transmission site in Ireland, and was one of the original five main Telefís Éireann television transmitters when it opened on low power in December 1962. It became fully operational on 12 June 1963 with a 625-line service on VHF Band III Channel F. The RTÉ Radio FM service was added in 1966, and RTÉ's second television channel RTÉ 2 was carried on VHF when it started in 1978.
The Mount Leinster transmitter is operated by 2RN and ASL, and is the highest transmission site in Ireland. It was one of the original five main Telefís Éireann television transmitters when it began broadcasting on low power in December 1962.  It became fully operational on June 12, 1963 with a 625-line service on VHF Band III Channel F. The RTÉ Radio FM service was added in 1966 and RTÉ's second television channel, RTÉ 2, began broadcasting on VHF in 1978.