6 May 2010
OY1OF was already receiving signals from me and G3ZJO at 0724z today on 10m WSPR. His signal with me had very distinct Doppler shift on each transmission suggesting that the E layer is moving or at least is unstable. The sunspot count (unrelated to Es I think) was at a very high 77 today. I've now reduced my TX power back to 1W as 5W is probably too much. I must try WSPRing on 10m with very low mW levels soon.