WYPR is a public radio station with largely middlebrow content serving the Baltimore, Maryland metropolitan area. The station broadcasts on 88.1 MHz on the FM band. Its studio is in Charles Village, Baltimore and its transmitter is westward in Park Heights. The station is simulcast in the Frederick and Hagerstown area on WYPF (88.1 FM) and in the Ocean City area on WYPO (106.9 FM). Surprisingly, the two stations on 88.1 are not synchronized. WYPF's sound is about 1/2 second behind WYPR, rendering WYPR almost unlistenable in some portions of Howard and Carroll counties.
The station signed on in 1979 as WJHU, owned by Johns Hopkins University. It took over from a carrier current station that had operated under the same calls on AM 830 since 1945. It originally aired a mix of classical music and NPR programming. WYPR has added more content from NPR and its partners, with a format of news/talk in the daytime and overnight weekday hours, and music (mainly jazz) programming during evenings and nights. In the fall of 1998, then-WJHU added overnight coverage of World Radio Network (WRN), which provides English-language news programs from broadcasters around the world; today the station simulcasts the BBC World Service during the overnight. Once respected, after the station was sold by the university in early 2002 to Your Public Radio Corp., a locally based group of station talk hosts and listeners, and became WYPR, educated listeners have largely fallen away. In 2004 Your Public Radio Corp. bought religious broadcaster WJTM in Frederick, which became a relay of WYPR with the call letters of WYPF. WYPF's signal also covers Hagersown. On July 30, 2007, Your Public Radio Corp. bought Ocean City, Maryland alternative rock station 106.9 WRXS, which began simulcasting WYPR starting September 10, 2007. That station was renamed WYPO on October 3, 2007.
For many years, the station operated at only 10,000 watts. While this provided a decent signal to Baltimore itself and most of its close-in suburbs, many of Baltimore's outer suburbs, including Annapolis, only got a grade B signal. In 2008, it increased its power to 15,500 watts, giving it a coverage area roughly comparable to the other major Baltimore stations. However, its signal is not as strong southwest of Baltimore because it must conform its signal to protect the University of Maryland's WMUC, which broadcasts on the same frequency. Due to its transmitter being located in northeastern Baltimore, some areas of Harford County get only a grade B signal.