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, sending greetings from his sons, David and Michael, and their neighbor, Miss Chapel.
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. It also contains his son David's Holotape. Reading the logs will update the map on the location of the Irish Pride Industries Shipyard where he stole a truck and Mass Bay Medical Center where his wife Bonnie works.
The separated family radio signal appears only in Fallout 4.