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Re: AO-40 spreadsheet

Hi Doug,

> Remember this:  Gain is basically proportional to the dish area.
> If you lose 3dB by using linear instead of circular polarization,
> you have to DOUBLE the area of the dish to compensate.
> A bigger dish is heavier, more expensive, has more windload,
> and has a narrower beamwidth, so you have to point it more carefully.

So, turning this around, I can improve my dish's gain by 3db if I
switch to a circular feed and cover the grill with a wire screen so
that I don't mess up the circular stuff?

Going circular on The Spreadsheet does make a noticable difference!


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