Yep, I know and feel what you mean. Have been there many times. Now I understand propagation is not always reciproke. However, it could be frustrating. Just move on! 73, Bas
This is NOT something that only affects QRP operators. I have seen this phenomena while at the NQ4I Multi-Multi operations operating 1.5 kW. It often happened early in the morning on 20m where African stations are beaming to Europe, yet their signals were propagating well to North America. Generally, 30 minutes to an hour later, we would work the same station on the first call. But, call too early, and they would generally just CQ in your face.