By 1930, the "Daily News" began experimenting with mechanical television broadcasting. A published announcement of March 30, 1930, indicated the equipment would be installed and operable within two months. The video signal was to be sent by the shortwave radio station W9XAP, while the audio would be broadcast on the normal WMAQ radio frequency. WMAQ did not receive an experimental license from the Federal Radio Commission to operate station W9XAP until September 2, 1930. The first broadcast of the station actually occurred shortly before this was granted, on August 27, 1930. Only those with special receivers, primarily radio stores which had gotten them from the Daily News, could see the video portion of the broadcast. The station distributed 200 receivers in the city and suburbs. Those at the dealerships saw and heard Bill Hay, the announcer for "Amos 'n' Andy", present a variety show, broadcast from the Daily News Building. The man behind this and other early Chicago television broadcasts was Ulises Armand Sanabria, who 2 years before used the WCFL Navy Pier transmitter to provide the video and radio station WIBO for the audio portions of the broadcast. Both the technical limitations and economic climate of the times brought an end to the station's experimental broadcasts in August 1933. It was the beginning of WMAQ-TV, which would not return until after World War II.