Wikipedia
WMDB is a Regional Mexican-format AM radio station broadcasting on a frequency of 880 kHz in Nashville, Tennessee. The station formerly broadcast at 1240 kHz as WSNG; current power is 2,500 Watts. The station is currently owned by Mahan Janbakhsh, through licensee TBLC Media #2, LLC. Nighttime power is reduced to 2 watts to protect the signal of WCBS in New York, New York. WCBS is the dominant Class A signal on 880 AM.
The station was formerly known as WKDA. Under this name and its former 1240 kc frequency it broadcast from the Stahlman Building in downtown Nashville for many years, becoming the first Nashville radio station, in the early 1960s, to convert to an all- rock music format. WKDA attempted to make its disc jockeys into major local celebrities, as had become the rage in many large U.S. cities.
WKDA's listenership went into decline in the late 1960s, under withering competition from WMAK, WLAC, and especially the switch of music listeners in general, and, at the time, rock listeners in particular, to FM. By 1970, WKDA had changed to a country music format; in the 1980s, it wound up in the hands of Nashville newscaster/entrepreneur Teddy Bart, who brought in a news-talk format featuring his own show and CNN radio, until it was sold to other owners who introduced gospel and rechristened it WNSG.