Quick reply from Radio OZNRH from Denmark. I heard snatches of music on 6263.5 kHz on Saturday night and sent audio files to the station to ask if it was them. Today I got the reply to say it was OZNRH. In his reply Ole said they are only using a 4m high vertical coil antenna but are increasing the height to 6m to try and improve the signal. Many thanks for the QSL.