WJR

Detroit, Michigan's WJR began in 1922 as WCX and operated at 580 AM.  In 1925 they were purchased by the Jewett Radio & Phonograph Company (the JR in the call letters).  They began broadcasting at 760 AM in 1941.  WJR's 50,000-watt, clear-channel signal can be heard, even during the day, here in Dayton, Ohio--a distance of over 200 miles.  In 2005, the station ceased to be the flagship station for the University of Michigan and began flagship duties for Michigan State.  More WJR stickers can be seen here.  And here.