WTTR was placed on the air in 1953 by local businessman Russ Morgan, the first song broadcast was the Star Spangled Banner on the 4th of July.
In 1981 WTTR AM changed format to Adult Contemporary, operating as a daytime only station known as Carroll Community Radio.
In 1984, Shamrock was granted permission by the FCC to allow WTTR AM to broadcast at night, adding two additional towers at its Uniontown Road studios in Westminster.
The station broadcast a successful MOR format dubbed Nightime Nastalgia hosted by DJ Steve Spencer and played Big Band Standards from the 40s and 50s.
In late September 2013, Sajak Broadcasting announced an agreement to sell WTTR to the newly formed Hilltop Communications, LLC.