From 1978 until 1994, PBS distributed its content via C-Band (first on Westar 1 from September 1978-February 1982; Westar 4 from February 1982-January 3, 1991; Spacenet 1 from January 3, 1991 – July 18, 1992; and Spacenet 4 from July 18, 1992 – February 5, 1994). On February 5, 1994, which the launch of Telstar 401, PBS transitioned its primary feeds to Ku band. However, one C-band feed remained, which was the PBS-X feed. With the failure of Telstar 401 on January 11, 1997, PBS temporarily moved their feeds to Telstar 402R (later Telstar 4). In October 1997, PBS moved their feeds to AMC-3 (GE-3) at 87°W, where they resided until 2008, when the feeds moved to AMC-21 at 125°W.
