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| Broadcast area | San Francisco Bay Area |
| Frequency | 107.7MHz (HD Radio) |
| Branding | 107.7 The Bone |
| Programming | |
| Format | Classic rock |
| Subchannels | HD2:KSFO simulcast (Conservative talk) HD3:KTCT simulcast (Sports radio) |
| Affiliations | San Francisco 49ers Radio Network |
| Ownership | |
| Owner |
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| KNBR,KNBR-FM,KSFO,KTCT,KZAC | |
| History | |
First air date | April 1, 1963 (1963-04-01) (as KUFY) |
Former call signs |
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Call sign meaning | San or Santa, the masculine and feminine Spanish words forsaint, which prefixes the name of several Bay Area communities |
| Technical information[1] | |
Licensing authority | FCC |
| Facility ID | 14484 |
| Class | B |
| ERP | 8,900 watts |
| HAAT | 354 meters (1,161 ft) |
Transmitter coordinates | 37°41′20″N122°26′11″W / 37.68889°N 122.43639°W /37.68889; -122.43639 |
| Repeater | See § Booster |
| Links | |
Public license information | |
| Webcast |
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| Website | www |
KSAN (107.7MHz, "107.7 The Bone") is acommercialFM radio stationlicensed toSan Mateo, California, and serving theSan Francisco Bay Area. It is owned and operated byCumulus Media and it airs aclassic rockradio format. It also serves as the FMflagship station for theSan Francisco 49ers Radio Network. KSAN's studios and offices are located inDaly City, California.
KSAN has aneffective radiated power (ERP) of 8,900 watts. Itstransmitter is off Radio Road onSan Bruno Mountain inBrisbane, California.[2] KSAN broadcasts in theHD Radio hybrid format.
On April 1, 1963, KUFYsigned on the air. It was the FM counterpart of KOFY (nowKTCT), owned by Intercontinental Radio, Inc. While the AM station aired aregional Mexican format, KUFY playedbeautiful music, mostly instrumentalcover versions of popular songs along withHollywood andBroadway showtunes.
Because KUFY playedeasy listening music, thecall sign changed to KVEZ in 1968.
In 1975, the station flipped to anurban contemporary format and took the call letters KSOL for "K-Soul".[3] The original K-Soul broadcast on1450 AM (nowKEST). KSOL became the first urban radio station on the FM dial in the San Francisco Bay Area. Local musicianSly Stone played a part in influencing the station to make the switch.
While KSOL managed to fend off competition fromKBLX unscathed throughout the 1980s, KSOL's ratings began to decline due to competition fromKMEL, then aTop 40 station which was slowly evolving in arhythmic contemporary format before going in a mainstream urban direction. Eventually, the decision was made to end KSOL and its format. The DJs were notified beforehand and held a goodbye show to send off KSOL on February 10, 1992. The final song on KSOL was "Miss You Much" byJanet Jackson. Afterwards, KSOL segued into a 72-hour loop of "Wild Thing" byTone Lōc.
On February 13, 1992, 107.7 FM flipped torhythmic contemporary, branded as "WiLD 107". The first song on "WiLD" was "D.M.S.R" byPrince.[4] For the first year and a half, the station retained the old KSOL call letters.
Allen Shaw's Crescent Communications bought the station in December 1993 for $13.5 million.[5] KSOL's call letters were changed to KYLD the following year. The company also purchased99.1 inSan Jose fromViacom, and begansimulcasting KYLD's programming in the South Bay, to expand coverage. Program Director Rick Thomas and Music Director Michael Martin set a plan in motion to overtake KMEL; they came up with a strategy of playing "old school" and up tempo freestyle/dance songs like those heard on heritage San Jose radio stationHOT 97.7. KMEL moved from rhythmic tourban contemporary at the same time, and the two stations battled with each other throughout the mid-1990s.
At 12:01 a.m. on July 2, 1997, KYLD moved to94.9 FM. 107.7 and 94.9 would simulcast until Midnight on July 7, when 107.7 FM, now with the KSAN call letters, beganstunting with construction noises and song clips as a prelude to a flip toclassic rock at noon on July 11.[6]
On March 13, 2000, after playing "Goodbye Yellow Brick Road" byElton John, followed by a stunt with funeral bells, the station relaunched as "The Bone", playing classic rock with a harder edge. To initiate this change, the station playedAC/DC "A to Z", all 154 songs the band had recorded at that point, aired in alphabetical order.[7]
With the demise of rival rock stationKSJO in 2004, the station adopted amainstream rock format. The playlist shifted back toward classic rock in April 2017.[8] The weekday on-air staff at The Bone consisted of morning team Lamont & Tonelli, as well as Chasta, Steven Seaweed andZakk.
In early 2016, Steven Seaweed's "All Request Hot Lunch" was cancelled by the program director. In August, Lejf Jaeger left the Bone. He had been part-time weekends for ten years. With his departure, "Local Licks" was also removed from the programming.[citation needed]
Steven Seaweed retired on July 1, 2017, after 44 years of deejaying in the Bay Area, the last 20 of which had been with KSAN.[9] On November 15, 2024, the station parted ways with longtime morning hosts Lamont & Tonelli. This was related to layoffs at Cumulus Media.[10]
Throughout theNFL season, the station broadcastsSan Francisco 49ers games. While co-ownedKNBR andKTCT are the primaryflagship stations for the team, KSAN also airs the games.
KSAN is rebroadcast on the following FM booster:
| Call sign | Frequency | City of license | FID | ERP (W) | HAAT | Class | FCC info |
|---|---|---|---|---|---|---|---|
| KSAN-FM1 | 107.7FM | Pleasanton, California | 28878 | 185 (Horiz.) | 926 m (3,038 ft) | D | LMS |
KSAN broadcasts in theHD Radio format.
From 2016 to 2018, the HD2 channel carried theNash FM country music network.[11]
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