Communication and Language
From @CrypieHef on Twitter a Ham Radio General, Navy Vet, InfoSec Engineer, and SETI volunteer:
This has a lot of signal identification and weird stuff that I like to research when no one knows what the signal is:
Also, if you have trouble with a signal you can upload them to Arecibo for analysis with this site (This is a temp site until they get it on their main site.
You can start listening to radio signals with just an SDR (Software defined radio). They can be had for about 30 - 40 bucks on Amazon. Just need to pair it to a better antenna than what comes with it (more to follow on this).
I use the RTL-SDR Blog V3 R820T2 RTL2832U 1PPM TCXO HF Bias Tee SMA Software Defined Radio with Dipole Antenna. It is capable of listening up to 1.7Ghz in Freq.
And you would want to pair it with an Ultra-Wideband High-Gain Directional Antenna (700 MHz to 8 GHz) for the 700MHz and above and direct it towards where you think a signal might come from based on research.
If you wanted to receive higher than 1.7Ghz you would need a beefier SDR like the NooElec HackRF One Software Defined Radio (SDR), ANT500 & SMA Antenna which handles up to 6GHz. (3-6Ghz is where I found my interesting signals.) But is much more expensive than the RTL-SDRs
To get started with Ham Radio just head over to https://hamstudy.org/
and http://arrl.org/ (I use hamstudy and their mobile app to study for the exams)