Bedside radio, battery mains but the mains cable had become intermittant when moved. I made this up many years ago with a 3 pin Bulgin plug and socket on the side of the set instead of the orginal flying lead.
Bulgin-3pin.jpg
Turned out that over the years of moving it about one of the wires in the plug had separated. Re-made all the solder connections, cleaned the contacts and a spot of magic spray and no more intermittency.
BTW this style of connector predates the now popular IEC type.
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History is much like an endless waltz: The three beats of war, peace and revolution continue on forever.
However history will change with my coronation - Mariemaia Khushrenada