WRDV began broadcasting on Sept 6, 1976 as WCSD, a 10-watt radio station located at the former William Tennent High School on Street Road. Its call letters are the initials of the station's original owner, the Centennial School District. In 1980 the station license was transferred from the School District to the Bux-Mont Educational Radio Association and the station relocated to the basement of the Warminster Township Building/Police Department at Henry and Gibson Avenues in Warminster, Pennsylvania. It began operations there on May 15, 1980, after a 16-month period of silence. In 1981 it increased power to 200 watts and in 1986 changed call letters to WRDV which stand for "Radio in the Delaware Valley." In 1987 WRDV began the "Delaware Valley Radio Network" by simulcasting on a translator in Sellersville/Quakertown at 88.7 and, in 1988, adding a translator at 91.9 FM in Lawrenceville/Trenton.