Radio KOSU-FM

KOSU 91.7 FM and KOSN 107.5 FM are NPR/classical music radio stations serving the Oklahoma City and Tulsa areas, respectively, and is owned by Oklahoma State University.

KOSU began broadcasting in 1955 and was a charter member of NPR. Shortly after joining NPR, the station built a new tower roughly halfway between Oklahoma City and Tulsa, so that each city got grade B coverage and most of the suburban areas got city-grade coverage.

In September 2004, KOSU moved to a new 1,100-foot tower near Guthrie that gave it primary coverage of Oklahoma City for the first time ever. The station also added improved service to Tulsa with the purchase of commercial station KGND in Ketchum, Oklahoma in September 2004 by Public Radio Capital which entered an LMA with Oklahoma State University to simulcast the KOSU signal. On the same day KOSU moved to its new tower, KGND changed its calls to KOSN.

In March 2006, KOSU added two new translators in the Tulsa area, at 101.9 FM in Oklahoma (owned by PRC) and 107.3 FM in Bixby (owned directly by OSU).