Dear List Readers Eureka moment! I finally figured out how to use the APF effectively, and it really does work on digging out weak sigs. XZ1Z was virtually indecipherable until I started messing with the APF. All of a sudden, I heard him Q5 (enough) to hear him come back to me distinctly. Thank you Elecraft and thank you Zorro! 73 todd WB2ZAB