[amsat-bb] Re: Circular polarization

[Bob- W7LRD]

Agreed... occasionally, sometimes left, right, vertical or horiz will be best.  Then is that for the up or downlink ?  Essentially I have discovered it is a crap shoot.  Whatever works at any given moment may not work (that well)  a few minutes later.   I believe Domenico had a scheme for switching any of the four.  These uncertainty's   make it fun. 

still rebuilding all antennas 

73 Bob W7LRD 

Seattle 



----- Original Message -----


From: " Ib Christoffersen " <oz1my@ privat . dk > 
To: "David 4X1DG" <4x1dg@ iarc .org>, amsat -bb@ amsat .org 
Sent: Sunday, May 13, 2012 10:44:55 AM 
Subject: [ amsat -bb] Re: Circular polarization 

Hi David, 
The short answer is NO. 

But there are more to it than that :-) 

I think I still have an article about that if you are interested. 

73 OZ1MY/ Ib 

----- Oprindelig meddelelse ----- 
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af David 4X1DG 
Sendt : 13 May 2012 18:31 
Til: amsat -bb@ amsat .org 
Emne : [ amsat -bb] Circular polarization 

Is a UHF circular polarization antenna needed for the current operational 
satellites? 
I am planning some work on my antenna system and wonder if the CP 
is needed, or actually, deteriorate the signal by 3dB if the satellites are 
using linear antennae?? 


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