Beginning in 1955 , KSFO changed to a middle of the road format with some jazz , sports , and rebroadcasts of classic radio shows several times each year . In 1956 , the station was bought by Gene Autry 's Golden West Broadcasting . KSFO called itself " The World 's Greatest Radio Station . " Its signature jingle , " The Sound of the City , " with words and music composed by Johnny Mann , was sung a cappella by eight studio singers at the United Western Recorders studio in Hollywood . The jingle reportedly was requested by listeners as much as any song on the station 's playlist and was subsequently adapted by similarly formatted stations around the country . For the next two decades , KSFO was the most listened-to station in the San Francisco - Oakland radio market . It was the home of singers such as Frank Sinatra , Nat King Cole , Barbra Streisand , Dean Martin and Tony Bennett , whose signature song is " I Left My Heart in San Francisco . " Memorable broadcasters from KSFO 's history include sportscasters Russ Hodges and Lon Simmons , newscasters Aaron Edwards and Mike Powell , and disc jockeys Don Sherwood , Carter B. Smith , Al " Jazzbeau " Collins , Jim Lange , Gene Nelson , Dan Sorkin , Jim Eason and John Gilliland . The station 's history included stints as the flagship station for both San Francisco Giants and Oakland Athletics baseball ( at different times ) and San Francisco 49ers , Stanford University and University of California football . A history of KSFO in the heyday of Don Sherwood ( 1950s and 1960s ) can be found in Laurie Harper 's biography , " Don Sherwood — The Life and Times of the World 's Greatest Disk Jockey . " The station 's news department earned national and international journalism awards for coverage of the Peoples Temple mass suicides in Jonestown , Guyana and the assassinations of San Francisco Mayor George Moscone and Supervisor Harvey Milk by former Supervisor Dan White . Newscasters , sportscasters , and DJs from KSFO played an annual softball game to benefit the Police Athletic League . In the mid-1980s , KSFO was given Federal Communications Commission approval to boost its nighttime power from 1,000 watts to 5,000 watts , the same as its daytime power
assassinations
Moscone–Milk assassinations
KSFO