KKSF (910 kHz) is a commercial AM radio station licensed to Oakland, California and serving the San Francisco Bay Area.

Starting in early 1922, the Tribune supplied content for Preston D. Allen's station, KZM, located on top of the Oakland Hotel.

[8] In the fall of 1923, KLX moved to its own studio on the 20th floor of the recently completed Tribune Tower at Thirteenth and Franklin, where it would stay there for thirty years.

KYA outlasted KEWB, while KOBY couldn't keep up and eventually changed call letters to KKHI, as "The HIGH Spot on Your Radio Dial", playing middle of the road music.

Guided by programmer Chuck Blore, KEWB began the same on-air approach implemented at Los Angeles sister station KFWB, and adopted the slogan "Color Radio - Channel 91".

KEWB played the current best-selling hits, added amusing format elements, and employed energetic, funny disc jockeys.

Chris Borden's weekend show was a "pool party," complete with sound effects: Casey Kasem dropped in wild tracks, Gary Owens delivered a stream of one-liners, Bobby Dale was frantic, and Ron Lyons was acerbic.

The station was considered the launching pad for the radio careers of Casey Kasem, "The Real" Don Steele, and Robert W. Morgan.

Gary Owens did a humorous morning show at KEWB, which he eventually moved it to KFWB, and in the 1960s was featured as the "announcer" on TV's Rowan & Martin's Laugh-In.

Other notable KEWB personalities included Don McKinnon, Buck Herring, "Honest" John Trotter, Art Nelson, Bobby Dale, Perry Roberts, Chris Borden, Jim Wayne, Michael Jackson, and Ken Knox.

The studio featured extensive space for tours of some of Metromedia owner John Kluge's art collection (also displayed at KTTV in Los Angeles).

Gaines and new program director John L. Hawkins quickly evolved KNEW to a fast-paced format of adult contemporary and oldies music hosted by humorous DJs.

Other KNEW air personalities during this period include Hal Pickens, Bob Raleigh, Harry Stephens (Osibin), and Eddie Alexander.

In 1972, KNEW general manager Ken Gaines and program director John Hawkins devised a "relationships" talk show that candidly focused on issues important to, and only accepted calls from, women.

Though "Channel 91" was quite popular, the early 1970s recession and oil crisis made it difficult to get sufficient advertising to support the large operation.

Eventually, Metromedia decided it could make more money by adopting a simpler, less-competitive country music format that was working for sister station KLAC in Los Angeles.

In July 1974, KNEW's format changed to "California Country" music, led by new general manager Bill Ward, who was also GM of KLAC.

Other airstaff members included morning man Frank Terry and music director Steve Leader in the afternoon slot.

KNEW became the flagship over-the-air affiliate of CNET Radio on January 14, 2000, offering technology news and talk 24 hours a day.

[13][14] On September 10, 2009, KNEW dropped "The Savage Nation" and replaced it with John and Ken from co-owned Los Angeles station KFI.

The Sacramento-based Armstrong & Getty program remained in the morning commute period, while Len Tillem and Gil Gross replaced John Gibson in the afternoon.

Tillem, Gross, Burns, and Wattenburg became available when KGO terminated many talk show hosts as part of a shift to a news and information format.

"[24] The progressive talk format had previously been heard on KNEW (960 AM) until that station switched to business news as an affiliate of Bloomberg Radio.

KKSF's progressive talk programming on weekdays included Stephanie Miller, Thom Hartmann, Randi Rhodes, Rick Unger, and Clark Howard.