On 3/1/12 4:45 PM, Bob K6UJ wrote:
>
> Has anyone used the HFTA program and can tell me the best height for a 15
> meter yagi for 6000 miles.
> Assuming there aren't any hills obscuring the take off angle.
>
> The carribean is about 6000 miles from my qth and from experimenting I have
> noticed that lowering the beam
> down from 90 feet down to 50 feet it is markedly better for 15 meters.
>
> I just bought the new antenna handbook and plan to dive in and learn how to
> do the HFTA myself but was
> hoping someone else had an idea of the best take off angle angle for 6000
> miles on 15.
> I believe 50 feet is about 3/4 wavelength high and gives me a 20 degree
> takeoff angle on 15.
> Hope this all makes sense, hihi.
>
There's some example charts in the Antenna Book that might work for you.
Pick another path that's of comparable length and see what it says.
Europe is about 6000 miles from 6-land, isn't it?
What you need to look at is the arrival angle statistics, and there's
charts for that.
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