During World War II, GIs in the field built really amazing simple radios to listen too. These were made with materials that they could get their hands on and were small enough to carry around in a big pocket. You can modify this design if you want to set it up so that it’s tuneable…
Digital compact radiomonitoring receiver from 9 kHz to 7.5 GHz. The R&S®EM100 digital compact receiver has been specifically designed as a cost-efficient mobile radiomonitoring solution. The receiver’s operation via remote control software and its monitoring functionality have been optimized for tasks requiring a handoff receiver in combination with a high-speed search receiver, for example. In…