Below is the spectrum
14KHz to 62KHz at 5pm 23/9/2020 at BH23 8DU using a random wire
around 150 feet long via a 100KHz low pass filter and a 9:1 unun
About ten teletype signals are
shown and not all the signals are identified
Horizontal lines are due to
Pictures are up to 1600 pixels
wide rather than my standard 1024 so you can see more detail.