I found this clip on youtube posted by dxer22000 who wrote: 

3EON-FM (EON-FM) 92.3 Changeover to 3MMM 105.1 - 1988 recording.
this old audio recording I did of 3EON 92.3 changing to 3MMM 105.1. 21 November 1988. Best to listen on a good stereo setup for the best effect.

The original clip can be found here. https://www.youtube.com/watch?v=nSXB8jNpGFA

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