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European Pirates and Private Stations / Re: radio merlin is on 6305khz
« on: June 24, 2019, 2231 UTC »only 20 watts and the aerial is a half wave dipole facing east west about 4 mts high
Thanks for the info. In that case your antenna is radiating efficiently, despite lack of height and with only 20 watt.
So, the reason for your strong signal over the UK tonight is: E layer refraction over the UK at 100 kms height
I tend to check Chilton Ionosonde graphs for propagation conditions over the UK, and they clearly showed strong e-layer reflection locally tonight, at a height of 100 km, this is why Radio Merlin's 20 watt signal was belting out strongly at S9+10 db levels in the UK, further away on the continent your signal will probably have reverted to being refracted by the normal F layer at about 300 kms height
This is the reason for tonight's good local propagation on 48 meters... of course it helped that there was little thunder interference, tonight, which hasn't happened in a long time, this month!


link above is the following:.
a station/apparatus available for its use;