Years ago I built a "camp radio" using a low cost AM/FM in-dash car radio and a couple of small speakers connected to about 25' of car antenna extension cable connected to a telescoping car antenna that I hung in a tree. Mine was powered by batteries, but a small 12-volt power supply would work just as well if 110 AC is available. I pulled in AM stations in the mountains with that setup that even the car's own in-dash radio couldn't get. The radio was installed in a small plastic tool box with ventilation holes added.