For the former WDFM station in State College, PA, please refer to WPSU (FM)WDFM is an FM radio station located in Defiance, Ohio. The station operates on the FM radio frequency of 98.1 MHz. The station is owned and operated by iHeartMedia, Inc., who purchased it from Lankenau-Small Media in 1999. It has a broadcast tower in Sherwood, Ohio.WDFM formerly operated an on-channel booster station in Fort Wayne, Indiana, but did not rebuild it after a winter storm toppled the booster station's tower.