The station later switched to country music when it went by the call sign KJAK under the ownership of Jack Beasley's Big Chief Broadcasting Company.

Due to Sossen's financial issues and two suspicious fires, the stations were subject to a bank takeover [citation needed].

The station received the official telegram from the Federal Communications Commission on Christmas Day, 1976 authorizing a call sign change to KATT.

KATT quickly became a success, filling a void for rock music that wasn't as pop-sounding as found on Top 40 stations.

Air personalities in the early days included Stan Tacker, Traver Hulse, Jim Stafford (Jimbob), Linda (Gabby) Goldfarb, John Michael Scott, David Bell, Charlie Parker, and Danny Hopper.

Some Top 40 AM stations attempted to catch the wave of progressive rock by featuring artists like Led Zeppelin, Rolling Stones and Bob Dylan at night to show they were hip.

The concert calendar was filled with acts that got the support they needed to sell out the Myriad, Lloyd Noble Arena and the Fairgrounds on a regular basis.

With successful Arbitron ratings, KATT stickers appeared on the rear windows of cars that crowded the parking lots of the Zoo Amphitheatre and the downtown Civic Center.

There was even an animated television commercial on late night programs featuring the smiling form of the cartoon cat from the sticker finding his way along the highways of Oklahoma City.