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Re: Re: Multiband feed



Hi,

yes, you are right about AO-40, loosing 3 dbs is not a big deal, but for
all the guys that have big dishes for ao-40, just listening for EME can be
very interesting.Then, the 3 dbs makes all the difference :-)



See you,
Fred.


> >I have built the VE4MA feed , but it needs a hybrid
> >coupler to achieve
> >circular polarization.The Septum feed doesnĄt!
> >Wonderfull!
> 
> Fortunately, most folks working AO-40 need not worry
> about receiving both RHCP and LHCP.
> 
> So, a VE4MA feed, or any circular waveguide feed for
> that matter, could be excited by a number of different
> methods including:
> 
> a squeeze section;
> crossed dipoles;
> polarplexor;
> 
> or possibly even a small helix, QHA or a circular
> patch. 
> 
> There's a good section in the ARRL UHF/Microwave
> manual written by W2IMU on dish feeds.
> 
> 73 de va3rr/aa8lu
> 
> 
> ______________________________________________________________________ 
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