I haven't thought of that in ages

Radio Luxembourg

And there are web sites for it. I don't remember it broadcasting in English, only in what I can guess was Luxembourish. The disk jockey would chatter on during the countdown, and then say something that sounded like "Nummell [insert what I assume was a number]!" and the music would start. We picked up Radio Luxembourg all over Germany -- the transmitter must have been huge.