Ralph Jennings, station manager at WFUV-FM/90.7 at Fordham University since 1985, will become director of internal and external relations on June 30. Stepping up as interim general manager will be Chuck Singleton, program director and chair of the station’s strategic planning committee. Under Jennings’ tenure WFUV has grown from an operating budget of $300,000 to more than $3.5 million annually. It’s also gone from a student-run operation to a staff of 27 professionals and more than 90 paid interns. Singleton joined WFUV in 1987 as its first director of news and public affairs; he began directing programming in 1992. Singleton created the magazine show Cityscape, expanded its schedule of Triple A music programming, and led the development of WFUV’s “The Alternate Side,” a online stream and HD Radio channel devoted to new artists and local music.