On April 5, 1966, Solar Broadcasting Company, owned by Walton Foster alongside KWFR (1260 AM), filed with the Federal Communications Commission to build a new FM radio station in San Angelo, an application approved on August 9.

In early 1984, a federal jury heard the case,[8] and Foster bought back the stations and reassumed control in April.

[9] In 1987, he flipped all of his other stations—KHOS-AM-FM in Sonora, KYXX in Ozona, and their translators—to simulcasting KIXY-FM with local news and public affairs for their areas.

Initially snagged by a late equal employment opportunity report filed by the buyer, Radioactivity soon imploded after Clyde Murchison was arrested for wire fraud.

One 1987 survey by Birch Ratings attributed more than half of all radio listening in San Angelo to KIXY-FM with a 51.6 share.