KTGG

KTGG (1540 AM) is a radio station broadcasting from Spring Arbor, Michigan with a Christian contemporary music and talk format. Until August 2014, it was simulcast on WJKN (1510 AM) in Jackson, Michigan. WJKN has since been sold to Jackson-Lansing Catholic Radio and is airing an independent Catholic talk format.

Unusual call sign

Call signs beginning with K are only supposed to be issued to stations west of the Mississippi River, so it was surprising that the calls KTGG were issued for the new station in 1980; some believe this occurred when someone at the Federal Communications Commission (FCC) read "MI" (the postal abbreviation for Michigan) on the station's application and mistook it as the abbreviation for Missouri or Minnesota. KTGG thus became the first new station east of the Mississippi with a "K" call in decades; the river was first used as the divider between K and W calls in 1922. (Stations such as KYW in Philadelphia (originally in Chicago) and Pittsburgh's KDKA have retained their heritage calls since before 1922). However, KTGG wasn't the last broadcaster with this distinction: a new station in Napeague, New York was originally dubbed KCBE in 2008 by the FCC, before changing to WEGB in 2009, and a Catholic radio station in Rhinelander, Wisconsin with the call letters KSPP was licensed in May 2015.