When 10 meters is open, amazing things can happen. Lu Romero, W4LT, knows that well. He said, “When 10 is open, I often venture up into the top of the band to see if there is any FM activity. I’ve always liked to use 10 FM, especially when conditions are marginal to observe the Faraday phase distortion on signals. Before FT8, 10 FM was always a good way to discover where the band was propagatin...