WQSR (102.7 FM, "102.7 Jack FM") is a commercial radio station licensed Baltimore, Maryland. The station is owned by iHeartMedia through licensee iHM Licenses, LLC. It broadcasts an adult hits radio format, using the syndicated "Jack FM" service and trademark. There are no DJs. Instead, a prerecorded male voice representing himself as "Jack" makes sarcastic and ironic quips. WQSR has an effective radiated power (ERP) of 50,000 watts. The transmitter is in Pikesville, next to the Pikesville Reservoir and the Baltimore Beltway (Interstate 695). The radio studios and offices are at The Rotunda Shopping Center in Baltimore. History WCAO-FM (1947-1977) On , the station signed on as WCAO-FM, the sister station to WCAO (600 AM). WCAO-FM originally simulcasted WCAO, owned by the Monumental Broadcasting Company. WCAO-AM-FM were network affiliates of CBS Radio, carrying its dramas, comedies, news, sports, soap operas, game shows and big band broadcasts during the "Golden Age of Radio." As network programming moved from radio to television, WCAO-AM-FM switched to a full service, middle of the road (MOR) format of popular music, news and sports. By the late 1960s/early 1970s, the two stations began airing separate programming, with WCAO-FM concentrating on classical music. V-103 (1977–97) By 1977, the station was sold to Plough Broadcasting, a division of the pharmaceutical company "Schering-Plough." WCAO-FM became WXYV. It aired programming for the African American community as V103, the major FM rival to both WWIN (1400 AM) and WEBB (1360 AM, now WQLL at 1370 AM). Originally playing automated disco music, WXYV eventually evolved into an urban contemporary format by the early 1980s. In the late 1980s and early 1990s, it was often Baltimore's top rated radio station. By 1995, WXYV and then-sister station WCAO were sold to Granum Communications. The following year, the stations were sold again to Infinity Broadcasting, a division of CBS. That made it a sister station to Hot AC-formatted WWMX, Mix 106.5. (WCAO was later be sold to Clear Channel Communications (now iHeartMedia), and eventually become a sister station to WQSR.) 102.7 XYV, and B102.7 (1997–2001) On June 20, 1997, at Noon, after having lost a large number of listeners to urban powerhouse WERQ (92.3 FM), WXYV became Top 40 102.7 XYV. The final song on V103 was "It's So Hard to Say Goodbye to Yesterday" by Boyz II Men, while the first song on 102.7 XYV was "Be My Lover" by La Bouche. The new