In 1923, Anthony was the founder and owner of what eventually became 50,000-watt KFI AM (640) radio, a station he controlled until his death in 1961. From 1929 to 1944, he also owned KECA/1430, which evolved into KABC. He was an early president of the National Association of Broadcasters and during his term oversaw the establishment of the organization's first paid staff. He also was a founder of one of the earliest television stations in Los Angeles, KFI-TV, channel 9 and KFI-FM/105.9 (now defunct), both of which were disposed of in 1951.