You're thinking of 98.9, which went through a whole bunch of formats in the 1980s and early 1990s. 99.7 was KMBR, then KLTH; beautiful music, then "lite" rock. I'd have to look it up to make sure, but I think the switch to "lite" music happened around 1990.I recall the switch. Was in Lawrence then, and preferred the new format, as there wasn't oldies anywhere else (on FM).
I know Topeka earlier had a satellite oldies station on FM, as did KC earlier. I think it was 98.9 or 99.7.
