Many thanks to SWLing Post contributor, Zack Schindler, who writes:
In the early 1980’s CBC Radio 1 had a radio play show called Nightfall. Most episodes dealt with the supernatural. I used to listen to this from CBE (1550 khz) in Windsor Ontario. One episode that aired in 1981 was called Shortwave Goodbye and the story was about a “ham radio enthusiast who receives messages from the future. When he gets rich gambling, will he be able to rid himself of his shrewish wife before she and her lover can kill him first? “
Here’s the audio recording from the Internet Archive:
You can also listen to this recording on YouTube.
Many thanks, Zack, for sharing a link to this program! Although I’ve listened to loads of OTR programs, I somehow missed Nightfall.