The article says he recorded a TETRA signal via sdr then transmitted that signal to cause a shutdown.
Are those signals not encrypted?
Was visiting relatives in a small town far from my current home and counted 4 christian radio stations.
This is a town of maybe 10,000 people but it sits equidistant between 2 small cities of about 200,000. They are about an hour away in opposite directions.
While driving across several states it sure felt like there were more christian stations than I remember as a kid.
What's it like where you live? Are there more religious radio stations than there used to be?