 XHMS, the first FM radio station in Coahuila, was approved to begin operations on December 8, 1965, received its concession on April 15, 1966, and signed on May 5 of that year.Named for founder Melchor Sánchez Dovalina, XHMS started on 99.3 MHz with a power of 250 watts, later increased to 310.In the 1980s, XHMS moved to 99.5 and increased its power to 1.9 kW.