The cool thing about WSPR is the weak signal aspect. I don't understand the math, but a receiver and the program to decode it can dig a signal out below the noi

The cool thing about WSPR is the weak signal aspect. I don't understand the math, but a receiver and the program to decode it can dig a signal out below the noise floor. If the band is open, you can literally transmit into a light bulb and have your signal picked up by dozens of receivers across the country. It's wild. And fun.