My earth-electrode "antenna" in the ground is a perfect match on 160m. So, I thought I would try it out on 160m FT8 with 2.5W. On RX it has spotted many stations in North and South America and my own signal has been spotted widely in Europe. I have also enjoyed several QSOs around Europe.
If people tell you they have no space for 160m, do not believe them! This antenna system is totally invisible to the XYL and neighbours. Most of the return wire is buried in bushes! I am pretty sure my XYL has no idea it is there. It is also pretty quiet electrically.