This popped up on reddit today. It’s apparently a little-known sub about how to listen to any radio broadcast with a $2 USB tuner. OP says we can listen to air traffic control, shortwave from around the world, the magnetic storms on Jupiter, etc.
I don’t know if it’ll be useful to us, and it’s a bit over my head, but I thought I’d pass it along, just in case. Never know, maybe someone can at least have fun with a new hobby.
Direct link to the sub: https://www.reddit.com/r/RTLSDR