| SANDALE 
          
            
              | Channel
                4H | Max
                ERP: 30kW (directional) |  
              | Vision
                carrier: 61.75MHz | Sound
                Carrier: 58.25MHz |  
              |  |  
              | The
                field strength contours on this map represent average values in
                millivolts per metre (in brackets, decibels relative to 1
                microvolt per metre) for qa receiving aerial height of 30 feet.
                The field strength at a particular site may differ by as much as
                3:1 (10dB) from that indicated. |  
              | BBC
                Engineering information sheet 2914 (3) | September
                1968 |  |