[amsat-bb] Re: 1.2 GHz Loop Yagis

Edward Cole kl7uw at acsalaska.net
Tue Sep 1 07:27:20 PDT 2009

At 06:06 AM 9/1/2009, nachif at terra.com.br wrote:
>   BODY { font-family:Arial, Helvetica, sans-serif;font-size:12px; }
>Has anyone used 1.2 GHz loop yagis on AO-51 or any other satellites
>  Was it worth? Would you recommend?
>  Any comment?
>  73,
>  Luciano PT9KK
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I have the 45 element loop-yagi from Directive Systems that I worked 
AO-40 with 9.5w (at the antenna).  It has 20-dBi of gain and is 
12-foot long.  For satellite use you want the 1268 model not the 1296 
model.  I tried stacking one of each and had bad SWR as a result.  I 
removed the 1268 model last weekend to install on my short tower for 
satellite (with B5400 az-el rotor).  I have a 15w 1268/144 Tx 
convertor which will be mounted on the elevation crossboom with a 
short run of 1/2-inch hardline.  The 1296 model will remain on my 
50-foot tower mounted inside my four 2m-eme yagis for tropo operation 
with 60w in the shack.  I also have a loop-yagi for 927.5 MHz use.

For AO-40, my experience indicated that 15-25w would have worked 
better, but then AO-40 ranged out to 65,000 km range.  For Leos, one 
of these loop-yagi should suffice with 10w.  KL7XJ has a Helix that 
he uses with 10w in the shack on AO-51.

73, Ed - KL7UW

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