8 points
Check out “slow scan tv” if you haven’t already. I have my amateur license and was surprised to learn all of the ways in which radio waves can be utilized
2 points
I first learned about SSTV over a decade ago from Portal! I remember I had to get a two sided 3.5mm audio cable to plug my computer’s speaker. https://youtu.be/DlIvnc-AZJQ (Video of someone decoding it.)
2 points
1 point
3 points