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Re: AO-40 " BBQ " dish versus Primestar Dish ??



It is my understanding that it is not the size but the fact that the BBQ
disk is only linearly polarized.  A circularly polarized feed does not help
much if the signal reflected to it is linear.  Some people have had good
results with lining there BBQ dish with metal screening or wire mesh
material, the nice thing about this is that there is less wind load and the
dish is lighter then a solid dish.


I hope this helps,
Bernie, K3BAZ

----- Original Message -----
From: "K7XQ" <k7xq@elite.net>
To: <amsat-bb@AMSAT.Org>
Sent: Saturday, May 31, 2003 3:50 AM
Subject: [amsat-bb] AO-40 " BBQ " dish versus Primestar Dish ??


>
> I am looking at the size difference between the BBQ dish and the
> Primestar dish.
> Does the slightly larger size of the Primestar Dish REALLY make a
> difference on the AO-40 downlink ???
>
> K7XQ   Jeff   Atwater, CA.
> Grid: CM97qi
> EME, Satellites, Meteor Scatter
> JT-44, FSK441 ( WSJT ) , CW
>
> 144 MHz: 4 X 3 W.L. 800 Watts single 3CX800A7
> Initials: 61
>
> 432 MHz: 2 X 9 W.L. 800 Watts 2 X 4CX400A7
> Initials: 5
>
> 1296 MHz: 3.1 M Dish 150 Watts 2 X 2C39 water-cooled
> Minimum dish elevation of 20 degrees :<
> Initials: 22
>
> K7XQ Homepage: http://www.elite.net/~k7xq/k7xq.html
>
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
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>


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