WYNZ Big Hits Y100.9, is an FM radio station licensed to South Portland, Maine, and broadcasting at 100.9 MHz. Until 2007, the station was an oldies formatted radio station known as Oldies 100.9. WYNZ began broadcasting in 1976 as adult contemporary station WRQN. In 1978, it was sold to the owners of 1310-WLOB-AM, at which time it was changed to album-oriented rock as WLOB-FM. During those years, it was known as "FM101-Portland's Best Rock", giving rock station WBLM some very serious competition and sometimes beating them in the ratings as well.