With the flip, KRBV's call letters changed to KJKK. For the first 11 years, KJKK was jockless, and rejected all song requests. It used the voice of Howard Cogan to make quips and sarcastic remarks several times each hour instead of having a DJ. In late 2015, the station added an airstaff, while still keeping Cogan for station imaging. In the summer of 2016, KJKK dropped the "Playing What We Want" slogan, and changed it to "Everyone Agrees on Jack FM." In early 2020, KJKK brought back the famous “Playing What We Want” slogan. To this day, Jack FM remains the second longest-running format on 100.3 MHz behind the Beautiful Music/Easy Listening format in its earlier years.