Re: [amsat-bb] modeling qha

[Wallace Strom <kg4yuw@xxxxxxxx>]

Thanks for all the replies!

Wallace Strom wrote:

> Hello,
>
> This might be off topic but...
>
> I have been trying to model a Quadrifilar helix antenna with MMANA and
> EZNEC 3.0 demo without much luck.  The pattern breaks down when I model
> the antenna at 6 meters above ground.  I have modeled W3KH's antenna and
> Steve Blackmore's "Tall narrow QHA" - both have nulls at the lower 30
> degress(0-30 , 180-150).  Any help would be appreciated.
>
> 73,
> Wally
> KG4YUW
>
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