 The station was known as Crown FM during its 28-day trial RSL broadcasts.Crown FM began broadcasting trials on 3 July 1999 using a restricted service licence on 107.3 MHz FM via a mast at Mousehold Heath.Further RSLs took place in the 28 days leading up to Christmas in 1999, 2000 and 2001, and from 26 April to 23 May 2003.