Using the earth-electrode "antenna" in the ground I have returned to 472kHz WSPR TX.
As the ground is very wet following the storms, it is very likely the ERP is below 10mW and the size of the loop in the ground is smaller than usual. The antenna current measures lower. If the soil conductivity is higher the signal cannot spread out so much as the effective loop area is smaller.
So far, just 4 spots by G0VQH (15km).
UPDATE 1815z: Still just spots from Jenny G0VQH. May later I may get more spots?
UPDATE 1935z: QRT. Is the earth-electrode "antenna" damaged?
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