A rough guide to when your signal will behave, or not Shortwave radio enthusiasts are sure to know the problem: Youre trying to tune in to your favorite global broadcast only to find that the signal is fuzzy. Is it you? Your equipment? It might just be the conditions in the ionosphere, which youd know if you built this DIY device. As detailed in a YouTube video and project writeup on Hackster, North Macedonian maker Mirko Pavleski built himself a wee machine that measures ambient RF energy...
