CityKUAZ-AM-FM: Tucson, Arizona
KUAS-FM: Sierra Vista, Arizona
Broadcast areaKUAZ-AM-FM: Tucson metropolitan area
KUAS-FM: Southeastern Arizona
FrequencyKUAZ: 1550 kHz
KUAZ-FM: 89.1 MHz (HD Radio)
KUAS-FM: 88.9 MHz (HD Radio)
FormatPublic radio
AffiliationsNational Public Radio
Public Radio International
Public Radio Exchange
OwnerUniversity of Arizona
(Arizona Board of Regents)
First air date
KUAZ: June 26, 1961 (as KFIF)
KUAZ-FM: April 27, 1992
KUAS-FM: October 11, 2018
Former call signs
KFIF (1961–1968)
KUAT-AM (1968–2000)
Call sign meaning
KUAZ-AM-FM: University of AriZona
KUAS-FM: KUAZ Secondary
Technical information
Facility ID1550: 2723
89.1: 3383
88.9: 173449
Class1550: D
89.1: A
88.9: C2
Power1550: 50,000 watts days only
ERP89.1: 1,600 watts
88.9: 1,700 watts
HAAT89.1: 187.0 meters (613.5 ft)
88.9: 675.1 meters (2,215 ft)
Transmitter coordinates
32°22′21″N 111°5′52″W / 32.37250°N 111.09778°W / 32.37250; -111.09778 KUAZ (AM)
32°12′53″N 111°0′21″W / 32.21472°N 111.00583°W / 32.21472; -111.00583 KUAZ-FM
31°28′51.7″N 109°57′31.3″W / 31.481028°N 109.958694°W / 31.481028; -109.958694 (KUAS-FM)
Translator(s)K283DC (104.5 MHz, Catalina)
K202EM (88.3 MHz, BisbeeDouglas, rebroadcasts KUAS-FM)
WebcastListen Live

KUAZ and KUAZ-FM are public radio stations in Tucson, Arizona, owned by the University of Arizona. KUAZ transmits on 1550 kHz on the AM dial, and KUAZ-FM is at 89.1 MHz on the FM dial. The stations simulcast a radio format of news and information, as a member of National Public Radio. KUAZ-AM-FM carry such popular NPR shows as "All Things Considered," "Morning Edition," "1A" and "Fresh Air with Terry Gross."

By day, 1550 KUAZ is powered at 50,000 watts, the maximum for AM stations. But because 1550 AM is a clear channel frequency reserved for Mexico and Canada, KUAZ is a daytimer, required to go off the air at night to avoid interference. The transmitter is off Interstate 10 near the Tucson Premium Outlets Mall in Marana.[1] KUAZ-FM has an effective radiated power (ERP) of 1,600 watts. The FM transmitter is on Tumamoc Hill Road in Tucson.[2]

Programming is also heard on KUAS-FM at 88.9 MHz in Sierra Vista, as well as two FM translators that fill in service gaps around Tucson and Southeastern Arizona.


As a construction permit, 1550 AM began as KSWC, but changed its call sign to KFIF before signing on the air on June 25, 1961; 60 years ago (1961-06-25).[3] It was owned by the Southwest Broadcasting Corporation.

In 1967, John B. Walton, who had bought KFIF in 1965, also bought a station at 580 AM, which he would christen KIKX. The station on 580 could operate 24 hours a day. Walton then donated 1550 AM to the University of Arizona. The station became KUAT on October 7, 1968.[4] KUAT initially had a format of classical music and jazz. When KUAT-FM went on the air in 1975, the FM played all classical music and the AM went all jazz.

The U of A put 89.1 FM on the air in Sierra Vista on April 27, 1992. It took the call sign KUAZ-FM, so as to distinguish itself from KUAT-FM.[5] The AM station adopted the KUAZ calls on August 11, 2000.


On October 11, 2018, after an 11-year process, KUAS-FM 88.9 came to air for the first time, broadcasting to Sierra Vista, Bisbee, Benson, Huachuca City, and Douglas. Previously, Sierra Vista received KUAZ via translator K217GI (91.3 MHz).[6]

A second translator, K283DC at 104.5 MHz, fills service gaps in the Catalina and Saddlebrooke areas to the north of Tucson and began operating in 2019.

Broadcast translators of KUAZ-FM
Call sign Frequency
City of license ERP
Class FCC info
K217GI 91.3 Sierra Vista, Arizona 82 D FCC FM Query
K283DC 104.5 Catalina, Arizona 250 D FCC FM Query


  1. ^ "KUAZ-AM 1550 kHz – Tucson, AZ". radio-locator.com.
  2. ^ "KUAZ-FM 89.1 MHz - Tucson, AZ". radio-locator.com.
  3. ^ https://worldradiohistory.com/Archive-BC-YB/1961-62/section%20B%20All%20Radio%20%20Broadcasting%20Yearbook%201961-1962-9.pdf
  4. ^ https://worldradiohistory.com/Archive-BC-YB/1970/B%20Radio%20All%20BC%20YB%201970%20All-3.pdf
  5. ^ https://worldradiohistory.com/Archive-BC-YB/1993/B-Radio-All-BC-YB-1993-B&W.pdf
  6. ^ "AZPM Launches New Radio Station in Southeast Arizona". Arizona Public Media. October 30, 2018. Retrieved April 23, 2019.

External links

  • KUAZ official website
  • KUAZ in the FCC AM station database
  • KUAZ on Radio-Locator
  • KUAZ in Nielsen Audio's AM station database
  • KUAZ in the FCC FM station database
  • KUAZ on Radio-Locator
  • KUAZ in Nielsen Audio's FM station database
  • KUAS in the FCC FM station database
  • KUAS on Radio-Locator
  • KUAS in Nielsen Audio's FM station database
  • K217GI in the FCC FM station database
  • K283DC in the FCC FM station database
  • K202EM in the FCC FM station database