I was listening to SO4R tonight band noise was -103dBm (about S-4) with bad static. The SO4 was peaking about 6 db out of the noise. Some lid came on his freq with a carrier virtually zero beat, and as you can see the lid was a good 20dB louder than the SO4. (For comparison the SO4's relative strength was about like the station that is at 3505)
I started playing around with my controls trying to copy him. I decided to just wait till the bastard exited so I turned on the ANL to notch him out. When the ANL finished its notch I could hear the SO4 UNDER THE CARRIER. They were virtually zero beat only a few hz off at most but it was all I needed to hear the 20dB weaker DX station. What I heard was not a normal CW signal but it was like I was hearing a subtraction product of the carrier and the SO4, but I could clearly copy what I was hearing. I worked him a little later. I can't even imagine how that worked, but it sure did!!
If you're interested in writing something interesting for this blog regarding your SDR experience let me know. I would like to include things like how your SDR contest station is set up, or your VHF station that uses SDR as the system center, feats of weak signal work or how well the SDR works in various challenging situations. If you are a foreign ham and would like to comment on the growth of SDR in your particular part of the world. Bring it on!
I reserve the right to publish or not, but I'm pretty open to documenting a wide variety of honest experiences from users, for readers to explore. The understanding of SDR in our hobby is so nascent, that I want the reader to be able to see the value of SDR through the eyes of YOUR experience and enthusiasm.