KSGM AM transmitted its first broadcast on July 5, 1947 from Ste. Genevieve, Missouri. KSGM was located at 1450 on the AM dial with a power output of 250 watts. KSGM's pioneer broadcasting schedule included local news of interest to the Chester community, religious broadcasts from St. John Evangelical Lutheran Church, sports from Chester High School and special programming from Menard State Prison.