Re: [amsat-bb] ao-40 antennas

["Edward R. Cole" <al7eb@xxxxxxxxxxxxx>]

Vince,

Unless you are content to only operate mode-S1, and hear that poorly, I
don't think 16 dBi is enough gain.  If you are going to expend the time,
energy, and cash to get a dish, then get one with a minimum of 22 dBi.  I
think if you have a decent preamp with <1 dB NF, that will give you an
adequate {but not top} 2.4G system even with a linear feed.

To really take advantage of mode-S2 and operate at squints >10, then I
would think 24 dBi and go circular polarity.  To my thinking the "magic
numbers" are: 24 dBi and 1 dB NF!

But I hope people using linear-pol will respond with their experience, and
what they are using {be sure to quote your NF, too}.

Ed
25.5 dBic, 0.7 dBNF

At 10:32 AM 8/11/2001 -0600, you wrote:
>How happy are people using dishes with linear polarization?  I'm starting 
>to look at dishes now.  Is 16dBi giving good results?
>
>kb7adl
 


----
Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org