[amsat-bb] Az-El Rotors

Jeff Breitner lists at rudn.com
Mon Jan 25 23:43:35 UTC 2016

On 1/25/16 9:08 AM, A. Kevin Arber wrote:
> Agree about the "Eggbeater" style.  When I first returned to the sats I
> homebrewed a couple and they worked fine.  But even better is a Moxin style
> which provides gain and circular polarization.  See Larry Cebik"s article
> in August 2001 QST.  I built these and they worked great for the LEOs.
> Great for portable too, as are omnidirectional.
> Kevin/W3DAD

I prefer them over the Eggbeater/Texas Potato Mashers, and the Moxons 
are a Field Day favorite for the linear transponder birds. Easy to set 
up, and with a small field day operation, I like simple. Have been able 
to work someone on pretty much every pass.

Never tried them for the FM birds or ISS contacts, I don't think they'll 
do well there at all during Field Day. Maybe normal operation, they 
would be "just okay" to "meh, need something better someday".

Image of the ones I built for field day:

The design PDF is at http://www.oocities.org/w9bci/VHFUHFSatelite.pdf.

The next iteration of the 400MHz antenna will use an appropriately sized 
rod rather than 12g copper wire.


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