The separated family radio signal is a radio station in the Commonwealth in Fallout 4. It can be picked up after extending the satellites at relay tower 0MC-810 and relays a message from Wayne Tournquist to his wife Bonnie.
The origin of the signal is a ham radio in the backyard bunker in West Everett Estates, which can be accessed from a hatch in a small shed attached to the house left of the water tower. The bunker contains an armor workbench, a trunk with loot, Wayne's terminal, a safe with random loot and the broadcasting ham radio. Wayne's terminal can be used to access the safe.
The separated family radio signal appears only in Fallout 4.