All day long I have been putting out 500mW on 10m WSPR TX. I am transmitting 100% of the time with randomised frequencies each transmission.
I know my tri-band antenna could be better, but I have received not a single WSPR spot all day! Results are better on 6m MSK144.
What disappoints is the lack of G stations. Even with very poor 10m conditions I would have expected spots out to 60-100km on WSPR. It seems people are not interested in the challenge.