returning to full responsibility for the station. WTMJ aired a full service format featuring a mixture of music, news, talk and local personalities along with sports play-by-play, as well as dramas, comedies and other programs from NBC. WTMJ made its debut broadcast on July 25, 1927. That day's broadcast featured music by the WTMJ Orchestra and included a remote broadcast featuring Bill Carlsen's orchestra. (Carlsen was later hired by WTMJ and went on to become Wisconsin's most widely known radio and television weather forecaster.) On September 11, 1927, WTMJ was assigned to 1020 kHz. WTMJ also began broadcasting University of Wisconsin Badgers football games that year. AM 620 On November 11, 1928, as part of a major nationwide allocation under the provisions of the Federal Radio Commission's General Order 40, WTMJ was reassigned to its current frequency of 620 kHz. In November 1929, WTMJ broadcast a Green Bay Packers game for the first time. WTMJ was indirectly involved with the installation of the first directional antenna by a radio station in the United States. In 1929 a joint operation in Clearwater, Florida, WFLA-WSUN, was also assigned to 620 kHz. WTMJ immediately complained that at the initial power allocation the Florida stations were causing significant interference to WTMJ's coverage, especially at night. WFLA-WSUN turned to the engineering community to determine whether a then-theoretical concept of a directional antenna could be installed to reduce the Florida station's signal toward Milwaukee. This led to the successful development in 1932 of the first modern AM directional antenna system. (WFLA moved to 970 kHz in 1941, with WSUN taking its place in Tampa, followed by the current-day WDAE) Radio City Studios In 1942, a new facility, The Milwaukee Journal'''s Radio City, opened for WTMJ and its FM sister station, W55M (later WMFM and WTMJ-FM), in addition to the yet-to-come WTMJ-TV. An article in the trade magazine Broadcasting reported that the building was the "first ever designed to house all three types of broadcasting." A 1944 survey by The Milwaukee Journal found WTMJ to be the most popular radio station in Milwaukee, especially for local morning show Top of the Morning and NBC radio's The Hour of Charm in evenings. WTMJ had gross advertising revenue of over $1.2 million. Gordon Hinkley began a near three-decade career with WTMJ in 1951, starting as a staff announcer and host of the Sunday morning beautiful music show Invitation to