Sender Freies Berlin (SFB) was a public broadcaster for West Berlin from 1954 to 1990 when East and West Germany united, and for all of Berlin until 2003 when it merged with Ostdeutscher Rundfunk Brandenburg (ORB) to form Rundfunk Berlin-Brandenburg (RBB). Their medium wave outlets were all heard fairly easily at our home in southern Germany. I heard their shortwave outlet in 1986 when we lived in Maryland. Below, you can see the QSL cards they sent in response to my reception reports. I heard their FM outlets on my trip to Berlin.