KJAC

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For the airport serving Jackson, Wyoming assigned the ICAO code KJAC, see Jackson Hole Airport.
KJAC is the former callsign of KBTV-TV in Port Arthur, TX
KJAC
City of license Timnath, Colorado
Broadcast area Fort Collins-Greeley, Colorado
Branding 105.5 ESPN
Frequency 105.5 MHz
First air date 1989
Format Sports Talk (KDSP simulcast)
ERP 50,000 watts
HAAT 397 meters
Class C1
Facility ID 38345
Transmitter coordinates 40°37′3″N 105°19′39″W / 40.61750°N 105.32750°W / 40.61750; -105.32750
Callsign meaning K JACk (former format)
Former callsigns KLOV-FM (Until 1988)
Affiliations ESPN Radio
Owner NRC Broadcasting, Inc.
Webcast Listen Live
Website 105.5 ESPN Denver
KJAC-FM1
City of license Boulder, Colorado
Frequency 105.5 MHz
First air date 1989
Format Sports Talk
ERP 99 watts
HAAT 0 meters
Class D
Facility ID 160514
Transmitter coordinates 40°00′43″N 105°11′16″W / 40.01194°N 105.18778°W / 40.01194; -105.18778
Owner NRC Broadcasting, Inc.

KJAC is a commercial radio station located in Timnath, Colorado, broadcasting to the Fort Collins-Denver, Colorado area on 105.5 FM. The station previously aired an adult hits music format branded as "Jack FM".

Jack FM Denver was the first Jack radio station in the United States. Denver's Jack employed a comedic irreverence in its presentation, and a style of music endemic to the varied tastes of Colorado's front-range listeners. Each Jack station is a little different, and KJAC's attention to the style of Colorado gave the station a unique and local feel.

On September 1, 2008, NRC Broadcasting converted KCUV into a rebroadcast of the current Jack FM feed, utilizing the 102.3 FM frequency to serve the broader Denver metropolitan area, while retaining the current 105.5 FM frequency that serves Northern Colorado. Jingles broadcast over the air often interchanged 102.3 FM and 105.5 FM, depending on whether the focus was on Denver, or the station in general. On July 15, 2010, it was announced that KJAC would stick with the current format while sister station KDSP flipped to sports on July 19, 2010. In 2011 105.5 Jack FM dropped the local version and started using the Dial Global StorQ version that smaller market Jacks use.

On September 7, 2012, KJAC started stunting with sports clips leading to a flip to ESPN Radio.[1]

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