It is very hard to calculate this as you have to compare "apples with apples". A calculation by PA3FWM suggests this could be 17dB!!
See http://www.pa3fwm.nl/technotes/tn09b.html .
20 Nov 2017
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Simple QRP projects, 10m, 8m, 6m, 4m, FT8, 160m, WSPR, LF/MF, sub-9kHz, nanowaves and other random stuff, some not related to amateur radio.
In our quiet part of the village is this delightful green. One of the trees has half its leaves of a different colour.
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