S-F Radio: Iconic KGO Call Letters To Disappear January 1

Starting January 1, KGO San Francisco 810 will adopt the KSFO call letters, replacing the short-lived sports-wagering format "810 The Spread." The KSFO calls will move from 560 to 810, and KSFO will adopt the new calls KZAC.

The KGO calls have been associated with the 50,000-watt 810 frequency in the Bay Area since January 8, 1924. The station was a dominant force in San Francisco radio for decades, consistently topping the ratings for nearly 30 years under the management of Mickey Luckoff. Chris Berry, Executive VP of News/Talk Programming at iHeartMedia, described KGO as a "crown jewel" in ABC's portfolio of radio stations.

However, by 2010, KGO's historic streak had ended. All-news KCBS added an FM signal, more listeners left the AM dial, and measurement methods changed. That year also saw the high-profile exit of Luckoff, who managed the station for 35 years. Luckoff lamented the disappearance of the legendary call letters, attributing it to inferior operators.

KGO's ratings, stature, and billings declined over the years, and in September 2022, owner Cumulus Media announced it would retire the station's long-running news/talk format

KGO Building 1926

➦In 1924...After several late-night test broadcasts, using the experimental call letter 6XG, radio station KGO signed on the air from General Electric's Oakland, electrical facility (the original two-story brick building, constructed specifically for the station on East 14th Street, still exists on the site), as part of a planned three-station network comprising WGY in Schenectady, New York, and KOA in Denver, Colorado.

The General Electric Company had been one of the giants of the electrical industry since its founding by Thomas A. Edison in the nineteenth century. After conquering the worlds of power generation and electric lighting, the company became one of the pioneers in the radio field as a partner with Westinghouse in the new RCA manufacturing conglomerate. As a major early manufacturer of radio receivers, they, like Westinghouse, saw the value in operating broadcast stations to promote the sale of radio receivers. General Electric constructed and operated WGY at its manufacturing facility in Schenectady, New York in 1922.

With the success of WGY, General Electric began making plans to build two other high-powered radio stations. One station was to cover the mountain and plains states, while the third was to be heard on the Pacific Coast. They immediately began investigating the San Francisco area as a base for the Pacific station, because of its location midway along the coast, and because of the ample supply of musical talent in the area. Originally, General Electric announced plans to build the station on Telegraph Hill in San Francisco, and had drawn up plans for several ornamental antenna structures to be built there. However, they finally settled on a site in Oakland, at a G. E. power transformer manufacturing facility there, located at East 14th Street and 55th Avenue. At the time, what is now known as East Oakland was only sparsely populated, and G. E. had just completed their sprawling plant on a 24-acre site earlier that year.

Construction was begun on the studio and transmitter buildings in June of 1923, about a year before the company's third station, KOA in Denver, was begun. The license was applied for and the call letters KGO assigned. Those call letters had previously been held by a radio store in Altadena, near Los Angeles. That station had gone off the air after less than a year of operation.

Meanwhile, newspapers in the area were heralding the coming of a great new super-station to the Bay Area. The "Examiner" headlined, "Plans Ready for Biggest Radio in the West". It announced that the new thousand-watt station would be strong enough to "throw the human voice one third around the world ... more powerful than any station west of Schenectady, New York," referring to G. E.'s eastern operation.

KGO was first known as the "Sunset Station"; at that time it operated with a then-impressive 1000 watts.  As was the custom with early radio stations, the programming consisted of performances by local talent, including the KGO Orchestra which provided some of the music; and a dramatic group known as the KGO Players, which performed weekly plays and short skits, often under the direction of Bay-area drama instructor Wilda Wilson Church. The station's music, which was also performed by other local orchestras and vocalists, would include classical selections as well as popular dance music the next night. Due to GE's involvement in RCA and RCA's launch of the NBC radio network, KGO was soon operated by NBC management as part of the NBC network.

➤Click Here for 1950 Program Schedule

KGO Transmitter Room - Date Unknown

By the 1928 Band Plan, 790 kHz was allocated to Oakland, California, and to KGO, which was then owned by General Electric, on an internationally cleared basis. In order to obtain a clear channel in Schenectady, New York, for what would become the present-day WGY, GE effected a breakdown of 790 kHz, whereby WGY would assume the maximum permissible power, and KGO would be lowered in power to 7.5 kW, which was then lower than the minimum permissible power for a clear channel station (10 kW), but higher than the then maximum permissible power for a regional channel station (5 kW). 

Both stations retained omnidirectional antennas. Therefore, GE effectively removed from the West one of its eight clear channels and added an additional clear channel to the East thereby giving the East nine clear channels and the West only seven. The other "regions" in the Band Plan all retained their allotted eight clear channels. In 1941, stations on 790 kHz were moved to 810 kHz. On December 1, 1947, KGO was directionalized, and power was increased to 50 kW, the new minimum (and maximum) power for a U.S. clear channel. An article in Broadcasting magazine noted that the increase "retired the nation's oldest regularly operating transmitter -- a 7,500-watter ... in use since Jan. 8, 1924."

KGO's tower falls after the Loma Prieta earthquake (1989)

The station is owned by Cumulus Media.