Mine is a Raspberry Pi4, overclocked to 2 GHz with an Airspy mini dongle, an RTL-SDR-LNA and a Vinnant CC1090/8-P aerial at about 50' AGL. The Pi, receiver and amp are in a box at the top of my 10m mast, powered via PoE with an 8m coax tail up to the top where the aerial is.