A short range (1/2 to 3/4 Mile or 1.21 kilometer) am radio station

SSTRAN AMT3000 AM transmitters sell as a kit for about $100. They are not complex. You can easily make them with common tools and a soldering iron.


If you had one, then you could legally broadcast to your neighborhood on the AM frequency. This would be a huge help post-collapse, but of course it's not secure. This would mostly be a means of communicating for fires, security, education, etc.