Peter Thompson's first radio-like experiences involved recording concerts (hand-held mic + cassette deck), making mix tapes for friends and attending/hosting listening parties with other enthusiasts. These proclivities found a broadcast outlet at Vancouver Co-op Radio, where, starting in 1975, Peter not only produced a wide variety of programs but also served as Program Director and Music Director. For many years, Peter also was a freelance producer for CBC Radio, and taught in a college media production program. Following a move to the Bay Area, Peter hosted programs at KCSM and KPFA before launching Bluegrass Signal on KALW in October 1995. Since 2004, the program has been syndicated on WAMU's Bluegrass Country.