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5

As an alternative to figuring all of this stuff by hand, you can use a tool like ITURHFPROP which does the math for you, based on statistical models of what the MUF and other variables will be for a given sunspot number, time of year, time of day, and location. I've chosen predtest.uk because it allows me to direct-link to results. After setting the TX ...


5

The actual math here is annoying enough that you will hardly ever want to use it (it requires knowing the incidence angle of the signal on the ionosphere, which is dependent on the height of the F-layer and the distance between the stations taking into account the curvature of the Earth). Zolesi and Cander gives the formula for incidence angle as $\varphi_0 =...


4

I will talk about my experiences with 2m here - 70cm is similar, except (and anybody who knows better than me please correct me) there is no sporadic-E at all ever on 70cm. It all depends on conditions. When I was living in the UK, I used to have a 9-element Yagi for 2m, and was into SSB DXing. I used 2.5W because that was all the power I had from my FT-...


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