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Re: [IRCA] ALA 100
- Subject: Re: [IRCA] ALA 100
- From: neilkaz <neilkaz@xxxxxxxxxxxxx>
- Date: Mon, 26 Jan 2009 14:25:27 -0600 (GMT-06:00)
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Thx, Nick...
Hmm 25 dB or even more, that is quite good and will make the array have even better patterns than I calculated since it had only 13 dB sidenulls when modelled with EZNEC in several different configurations. I recall Andy telling me he got about 18 db side nulls.
I'm curious, has anyone else with an ALA100 measured the side null depths ? I was unable to find any review online except Guy's discussing null depth.
73 KAZ
-----Original Message-----
>From: Nick Hall-Patch <nhp@xxxxxxxx>
>Sent: Jan 26, 2009 12:51 PM
>To: Mailing list for the International Radio Club of America <irca@xxxxxxxxxxxxxxxx>
>Subject: Re: [IRCA] ALA 100
>
>At 18:07 1/26/2009, you wrote:
>
>
>>For those who have ALA100's, I am curious as to what the front-side ratio is in practice..ie how deep are the side nulls ?
>
>I would think that's mostly dependent on the geometry of the loop, Neil, which is up to the user. Guy Atkins put a nicely constructed loop on a rotator:
>
>http://perseus-sdr.blogspot.com/2006/07/close-up-wellbrook-ala-100-antenna.html
>
>and found 25 to 30 dB nulls.
>
>best wishes,
>
>Nick
>
>
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