 In late 1976, B.V. Hammond, Jr. and Lofton L. Hendrick sold the station to Grayson County Broadcasters, Inc., which sold the station the next year to Radiozark Broadcasters.As Radiozark did not buy KDSX AM radio (now KKLF in Richardson), it changed the callsign to KDSQ.In the 1990s, KDSQ made a series of technical improvements, changing from class A to C3 in 1991 and becoming a full class C station with 92 kW ERP from a transmitter northeast of Decatur in 1999.