Because 1540 AM is a clear channel frequency, KASA reduced power at night to 19 watts to avoid interference to other stations.
It originally was a daytimer station, powered at 10,000 watts but required to go off the air at night.
The call sign KASA had once been assigned to a radio station in Elk City, Oklahoma.
In April 1980, it built and signed on an FM sister station, 107.9 KMLE, which broadcast a mix of religious programs and easy listening music.
It relaunched as "La Indiscreta 106.7 FM" with a classic regional Mexican format.