1962 listing reflecting original operation.
1976 listing. By this time, ch 62 had increased power significantly & added color operation. They were also by this time licensed & operating KTOY-FM 91.7
1988 listing. By this time KTPS-TV was operating on (analog) ch 28 & the FM station now had the calls KTPS-FM.
1993 listing. By now ch 28 had the calls KBTC-TV & an ownership change to Bates Technical College. The co-owned FM at 91.7 retained the KTPS-FM calls during this time period. These listings are from “Television Factbook” in my collection & is intended as an appendix to Tom Layson’s excellent tour & history of KTPS/KBTC-TV.