For those of us who not involved in the digital world that can reach into the noise and extract a useable signal, I was curious as to how useful the 630 meter band would be.
Before jumping into a big winter project, I connected one side of of the ladder line that feeds my 80 meter loop to my receiver tuned down to 475 KHz.
Sure enough a CW signal was present. Over several days I world spend the hour between 9 and 10 pm EST monitoring the band. While the band was not hopping with signals, I did hear several good QSOs from different call zones plus a few down in the noise. It is safe to say you will do a bit of listening.
It was encouraging enough to warrant spending the time to build a resonant receiving antenna and to try to capture some of the weaker signals. Then see what the transmitting side is all about. Monitoring the USB I heard a few digital signals as well.
It appears to be a great band for the incessant tinkerer and it is simple enough to connect one side of your antenna wire and give a listen.