For many years, FM 89.7 was the frequency for WDYN, owned by Tennessee Temple University of Chattanooga, Tennessee. WDYN began as the campus station for the then-Tennessee Temple College in 1968. In November 2010, Tennessee Temple sold the station's tansmitters and frequency to Bible Broadcasting Network for $2.5 million as WYBK. The school retained the studio facilities, and continued to broadcast on the internet. The school subsequently purchased WUUS (AM 980) from 3 Daughters Media for $175,000, and began broadcasting its signal on that frequency on December 4, 2010.