KMXA (1090 AM) is TUDN Radio Denver, a Spanish-language sports station, and before that it was home to the first all-sports station west of the Mississippi. If you remember Denver sports talk on 1090, or the Spanish-language Rockies broadcasts, it’s the same signal.
History
It signed on September 12, 1972, as KAAT, a 50,000-watt daytimer. A new owner bought it in 1978, and from 1979 it was KLDR, a listener-request station. After a few more call changes, it became KYBG in 1987, billed as the first all-sports radio station west of the Mississippi.
Sports ended in December 1995, and the station simulcast KQKS. EXCL Communications, later Entravision, bought it in August 1996 and made it Spanish-language KMXA. Since then it has simulcast KXPK, played Spanish oldies, carried Colorado Rockies baseball through 2012, and run Super Estrella (2015), La Suavecita (2018) and ESPN Deportes (2019). TUDN Radio took over in August 2020.
Call sign timeline
- KAAT: 1972 to 1979
- KLDR: 1979 to 1984
- KLSZ: 1984 to 1985
- KLSC: 1985 to 1987
- KYBG: 1987 to 1996
- KMXA: 1996 to present
The signal
- 1090 kHz AM, licensed to Aurora, Colorado
- Branding: TUDN Radio Denver
- FCC facility ID 10057
Sources
STATION FILE
FROM THE TIMELINE
Moments in KMXA-AM History
KAAT becomes KLDR
KAAT becomes KLDR: the 1090 AM station in Aurora changed its call letters from KAAT to KLDR on January 2, 1979.
KLDR becomes KLSZ
KLDR becomes KLSZ: the 1090 AM station in Aurora changed its call letters from KLDR to KLSZ in 1984 (exact day not yet confirmed).
KLSZ becomes KLSC
KLSZ becomes KLSC: the 1090 AM station in Aurora changed its call letters from KLSZ to KLSC on September 25, 1985.
KLSC becomes KYBG
KLSC becomes KYBG: the 1090 AM station in Aurora changed its call letters from KLSC to KYBG in 1987 (exact day not yet confirmed).
1090 AM goes Spanish-language as KMXA
August 1996 — EXCL Communications, later Entravision, bought Denver's 1090 AM and turned it into Spanish-language KMXA. It later carried Rockies baseball in Spanish through 2012 and has been TUDN Radio since August 2020.
KYBG becomes KMXA
KYBG becomes KMXA: the 1090 AM station in Aurora changed its call letters from KYBG to KMXA in August 1996 (exact day not yet confirmed).
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