The first time I think I was doing something that can be called a ‘SDR’ was when I read about receiving NOAA APT weather transmissions with self made wx receiver kit – the kit came with a very small ‘computer’ capable of tuning receiver to the correct frequency and was also capable to receive command…

This Old Lady was the one that woke my DX brain cells <3I think she is still somewhere in the attic enjoying her retirement years.