Hey, I like to throw antennas into the trees an see where I can get to with this. When I ran my Dipole with my 20w G90 I am most of the time just under the noise level. So I just build a 15m and 10m Moxon antenna to have a bit more directional power and it seems to work.
Just a list of links and antenna experiments by radioamateur DA6TH
HF PROPAGATION
Karten & Wetterdaten
Moxon & Arrays