In the last few minutes, I have returned to 472kHz WSPR (5mW ERP from the earth-electrode "antenna" in the ground). As the SMPSU is on I am not expecting to spot stations unless they can beat my local S8 noise floor. However, I am only on TX for 20% of the time with 80% of the time on RX.
I may turn off the SMPSU so I can listen through the night on batteries with a nice low noise floor.
UPDATE 2124z: So far this evening best TX DX is just G4FTC (123km) in IO91 square.
UPDATE 2244z: PA0RDT (243km) is now the best TX DX so far.
UPDATE 2304z: PI4THT (448km) is now the best TX DX. So far, only G3KEV (232km) has managed to be copied over my local noise!