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There was plenty of frequency congestion in Dublin in the late 1970s as the pirates upped their gain and became full-time operations. Stations congregated around the same part of the AM band between 1100-1200 kHz often interfering with each other or hopping onto each other’s favourite spot. We heard already how ARD switched frequency at night to avoid co-channel interference with overseas stations.
This discussion on the FRC show on Big D from 13th November 1980 gives a sense of the problem. The unidentified presenter takes a call from a listener who has a lot to say on the topic and veteran of the pirate scene Ken Sheehan (Edwards) comments that the new Sunshine Radio has set an example by choosing the other end of the band. The recording ends with the Big D song, which was recorded by one of the DJs, John Paul.
Hear a better quality version of the song here, courtesy of Kieran Murray.