What Are Those Weird Tones?

If you tune around the HF bands, you’ve very likely heard strange-sounding tones, squawks or beeps, and wondered what they are. Here is a link to a very well-done Wiki that gives you audio samples you can listen to, and a brief explanation of all sorts of different modulation types found on the Amateur bands to help you identify what you’re hearing:

https://www.sigidwiki.com/wiki/Category:Amateur_Radio