services use Horizontal polorisation UHF 22 (482 MHz) - Saorview 2RN Mux 2 UHF 25 (506 MHz) - Saorview 2RN Mux 1 Analogue Television -all services now ceased (PAL-I UHF) All UHF services used Horizontal polorisation (Vertical on VHF) UHF 23 (487.25 MHz) - TG4 Croaghmoyle (RTÉ site) UHF 26 (511.25 MHz) - TV3 (Allocated but never used) UHF 29 (535.25 MHz) - RTÉ One Croaghmoyle (RTÉ site) previously VHF Ch D Vertical Originally Channel H (before 1978). UHF 33 (567.25 MHz) - RTÉ Two Croaghmoyle (RTÉ site) previously VHF Ch F Vertical UHF 39 (615.25 MHz) - TV3 (previously Eurosport) Tawnycullawee UHF 42 (639.25 MHz) - ITV (previously Sky News) Tawnycullawee UHF 47 (679.25 MHz) - BBC One Tawnycullawee (deflector site) UHF 50 (703.25 MHz) - (no longer in use -formerly UTV) UHF 53 (727.25 MHz) - BBC Two Tawnycullawee (deflector site) UHF 56 (751.25 MHz) - Channel 4 Tawnycullawee (deflector site) External links mast pictures Croaghmoyle Tawnycullawee and Westport www.w9wi.com Irish VHF Channel Identification Mass media in County Mayo Buildings and structures in County Mayo Castlebar