sentences:  WMHG used ABC Radio Networks' satellite-delivered "Timeless Favorites" (formerly known as "Stardust") format.It first began broadcasting around 1948 under the WKNK call sign, which stood for the original owner of the station, Nick Kurtis.In 1956, WKNK became WTRU, airing a Top 40 music format that would become legendary in the history of West Michigan radio and dominated the Muskegon market through the mid-1970s.