In May 1923 the Department of Commerce set aside a band of "Class B" frequencies reserved for stations that had quality equipment and programming, and the Cincinnati region was assigned exclusive use of 970 kHz. In the summer WLW began operating on this new frequency, sharing time with another Cincinnati station, WSAI. In May 1924 a third Class B station was established in Cincinnati, WFBW (now WKRC), which the next month revived the WMH call letters. WLW was unhappy with having to split time with two other stations, so in June 1924 government regulators moved WLW to 710 kHz, sharing time with WBAV (now WTVN) in Columbus.