At 06:32 PM 12/27/2005, Clay Curtiss W7CE wrote:
>My simulations indicate that as you adjust the array elevation
>above 5 degrees the vertical lobe begins to broaden.
How did you slew the array vertically? By tilting or by phasing the feeds?
> At about
>16 degrees elevation, the vertical 3 db beamwidth is 24
>degrees (from 3 to 27 degrees). It's not the prettiest pattern one
>has ever seen, but it should work quite nicely for general purpose
>dxing and/or contesting.
I assume the horizontal beamwidth is approximately similar? So, to a first
order, this works out to about 20dBi gain?
Assuming he's running 1500W, that's a fairly impressive 150kW EIRP.
>Clay
>
> >
> > Yes, that's absolutely right, Jim. I am guilty of thinking "in the
> > box". If you remove the straight jacket of the conventional Yagi
> > with fixed tuning/phasing, and exploit the large design space
> > allowed by the independent element length control, you can
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|