When you tune your radio to 102.5 FM in San Francisco, depending on the time of day, you might hear public radio style talk programming, or you might hear music from local artists. That’s because two radio stations share the frequency — KSFP, from the San Francisco Public Press, and KXSF, a project of San Francisco Community Radio. Carolyn Keddy and Ellie Stokes, two DJs at KXSF, joined us on “Civic” to talk about their experience working with scores of volunteers who bring a broad array of music and cultural programming to the airwaves and to the station’s live stream at kxsf.fm.