If you lack a shortwave radio and a dig around all your family’s junk hasn’t turned up a relic from decades past, then the simplest way to get one is of course to buy one. AliExpress is full of “world band” radios starting from somewhere under $20, and if you don’t mind waiting for shipping from China then it’s the path of least resistance.

But there’s the problem, international events are moving fast and there might not be the luxury of waiting three weeks, or even for that matter of being able to order one at all in a warzone. How can you make one? //

geocrasher says:
March 17, 2022 at 8:56 am
If anybody would like to build a Direct Conversion receiver from scratch, I have documented a design and build on my site. It covers the theory of operation as well as construction techniques, and uses the si5351a as an oscillator with an Arduino for control. Has to be heard to be appreciated :)

https://miscdotgeek.com/building-direct-conversion-receiver-part-1/

http://websdr.org/