wavelength. The Kierulff company acted as contractors responsible for installing the station in the Los Angeles Times building at First and Broadway, and in November the newspaper's owner, the Times Mirror Company, became the official licensee. The KHJ call letters were randomly assigned from a roster of available call signs, although the station quickly adopted the slogan "Kindness, Happiness and Joy". Test transmissions began on April 8th. The station's formal debut broadcast was held on April 13th from 6:45 to 7:45 p.m., featuring, in the words of the newspaper, "the powerful baritone voice of Joseph Schwarz of the Chicago Grand Opera Company in the prologue from 'I Pagliacci', and a dulcet tonal treat by Edith Mason, diva of the same company, and flashing the news of the world to the Southwest". 1922 saw a rapid expansion in the number of broadcasting stations, most sharing the single entertainment wavelength of 360 meters, which required progressively more complicated time sharing schedules among stations in the same region. In September 1922 the Department of Commerce set aside a second entertainment wavelength, 400 meters (750 kHz) for "Class B" stations that had quality equipment and programming, and KHJ was assigned to this more exclusive wavelength, where it was later joined, on a timesharing basis, by KFI. Along with the 400 meter authorization, KHJ was also authorized to broadcast on the 485 meter "market and weather reports" wavelength. In May 1923 additional "Class B" frequencies were made available, with Los Angeles allocated 640 and 760 kHz, and KHJ was assigned to 760 kHz, while KFI moved to 640 kHz. In early 1925, KHJ was assigned to 740 kHz. The Federal Radio Commission (FRC) was formed in early 1927. That fall it moved KHJ to 720 kHz, and in early 1928 the station was reassigned to 750 kHz. On November 11, 1928, the FRC made a major reallocation under the provisions of its General Order 40, which moved KHJ to 900 kHz, a frequency designated for "regional" service, with 1,000 watts of power For a short time during the late 1920s and early 1930s KHJ was the Los Angeles affiliate and West Coast production hub of the fledgling CBS radio network, the originating station for Bing Crosby's first national network radio show in 1931. On April 29, 1934, the cartoon character Donald Duck made his first appearance, on the California Melodies radio program of KHJ, a