WKBO

"Fortress 1230 AM" WKBO is a Contemporary Christian station in Harrisburg, Pennsylvania.  The 1230 AM frequency has had the same call letters since 1933 when they were owned by the (W) Keystone Broadcasting Organization.  For most of the 1970s WKBO was a popular Top-40 station before a switch to AC occurred around 1980.  Subsequent formats included Talk and Adult Standards before the flip to their current format in 2001.  A detailed history of WKBO can be found here.