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Re: 1.2GHz and K5GNA BBQ Ant ??



In the Proceedings of the AMSAT-NA 22nd Space Symposium, Anthony Monteiro, 
AA2TX, presents a paper "From Sizzling Hot BBQ to Cool BUD-Lite," pages 
168 -183.  The article presents measured results of adding a screen surface, 
adding baffles, and using a newly design horn feed to  39" by 24" barbeque 
dish.  If your antenna is down for modifications, I would highly recommend 
the article.  Each step was a significant improvement.  He reported the Sun 
noise increase with a dipole feed increased from 1.5 dB for the stock dish 
and feed to 1.9 dB by adding the aluminum foil.  Screen wire should produce 
similar results.

John  WA4WDL

----- Original Message ----- 
From: "Bill Booth" <710138@ican.net>
To: <Amsat-bb@amsat.org>
Sent: Friday, November 17, 2006 5:11 PM
Subject: [amsat-bb] 1.2GHz and K5GNA BBQ Ant ??


> Mark Brueggemann K5LXP recently inquired about a 1.2GHz antenna but
> mentioned he had a K5GNA barbecue dish and  converter.  Since I have my
> antennas down for rework, (since I moved) I am wondering the same thing.
>
> I am also curious if covering the BBQ grill with screening material on the
> K5GNA unit is worth the trouble.  There was lots of discussion about it 
> when
> AO-40 was working, but I do not remember anyone saying it was worth the
> trouble.  Anybody add the screen material to the unit and what kind of
> improvement did you hear......
>
> Bill Booth VE3NXK
> Sundridge ON, Canada
> 79.23.37 W x 45.46.18 N
> FN05ns
>
> Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html
>
> _______________________________________________
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