 The station began broadcasting July 25, 1960, and originally simulcast the programming of its sister station WMBI AM 1110.The station originally had an ERP of 44,000 watts at a HAAT of 450 feet.The station's ERP was increased to 49,700 watts in 1963, and in 1972 its ERP was increased to 100,000 watts at a HAAT of 441 feet.