FM broadcasting
VHF Radio waves do not travel far beyond the visual horizon, so reception distances for FM stations are usually limited to 30–40 miles (50–65 km) They can also be blocked by hills or buildings.
Manchester United Radio
The station was a Low Power AM station only available when Manchester United played a home game at Old Trafford, generally broadcasting from around three hours before kick-off until around two hours after the final whistle. As an LPAM station broadcasting with a Restricted Service Licence, it could only be received within a limited distance from the stadium – approximately a 50-mile radius.