| BRIGHTON 
          
            
              | Channel
                2V | Max
                ERP: 400W (directional) |  
              | Vision
                carrier: 51.75MHz | Sound
                Carrier: 48.25MHz |  
              |  |  
              | The
                field strength contours on this map represent estimated average
                values in millivolts per metre (in brackets decibels relative to
                1 microvolt per metre) for a receiving aerial height of 30 feet.
                The field strength at a particular site may have differed by as
                much as 3:1 (10dB) from that indicated. |  
              | BBC
                Engineering information sheet 2925 (1) | January
                1967 |  |