UPDATE 1345z: USA stations are now spotting my 500mW and also being spotted by PY3FF (10440km) at a decent -19dB S/N. 500mW seems quite enough to be noticed around the world on 10m WSPR even with my less than ideal antenna.
UPDATE 1610z: Dropping power to 500mW really seems to have made very little difference to the stations spotting me. I may be less strong, but that is all. Apart from quite a few stateside spots (best DX in that direction is KD6RF (7547km), my best DX spot is from PY3FF at 1250z.
UPDATE 1630z: These are the unique stations reporting my 500mW so far today on 10m WSPR. Quite a decent selection.
|10m WSPR unique reports today with 500mW TX|