Re: [amsat-bb] Mode L uplink antennas

["Woody" <kj4so@xxxxxxxxx>]

Hi Keith:

A search on Google turned up construction details on a 24 element loop Yagi 
by Directive Systems, which until earlier this year, were sold by Down East 
Microwave.  Now, they sell their products direct.  Directive Systems, 
manufactures high quality VHF/UHF and microwave antennas and accessories.

Loop Yagis are great antennas on 1296 and 1269 MHz.  This antenna is 
advertised as 18 dBi gain with 24 elements on a 6' boom.  It could easily be 
shortened as needed for a satellite antenna.

Check out:
http://www.directivesystems.com/PDF/2424LYRMK.PDF

73,

Woody
KJ4SO
AMSAT # 5562


----- Original Message ----- 
From: "Keith Bainbridge" <vk6xh@arach.net.au>
To: "amsat bb" <amsat-bb@AMSAT.ORG>
Sent: Friday, March 25, 2005 8:07 AM
Subject: [amsat-bb] Mode L uplink antennas


>I am having great difficulty finding details to make a 1269 mhz yagi etc.
> All the info I can find on the net relates to 1296 mhz, I scaled one of 
> Kent's 10 ele " Cheap " yagis to 1269 but the swr / bandwidth is extremely 
> small ( ie 60 khz ) so I guess I'm doing something wrong here.
> Has anyone any designs available for this freq, or can you point me in the 
> right direction maybe ??
> I dont mind if its a yagi, a quagi or what ever, but I dont want to build 
> yet another helical. My success rate with helicals is 7 made, 2 actually 
> worked, and thats from 2mtrs to 10 ghz!!
> And it was the 5ghz one that was the best !
> I would buy a Tonna  but they are so expensive to ship to Australia.
> Any leads would be appreciated, there is a gap on the rotator just waiting 
> for another antenna !!
> 73 de Keith
>
> -- 
> Keith Bainbridge
> VK6XH
> N.C.R.G
> Amsat NA #35338
> W.I.A.
>
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