[amsat-bb] Re: Crossed yagis

kc6uqh kc6uqh at cox.net
Sun Dec 23 22:51:33 PST 2007

Simplest way is to use relay or switch to add a 1/2 wavelenght of coax to 
one antenna phasing line. This will shift the phase by 180 degrees added to 
the 90 degree phase shift will reverse the rotation. You can also swap the 
phasing line connections  to the antennas, but this requires more contacts. 
For 70 cm and shorter wavelengths a coax type of relay should be used for 
best performance.

----- Original Message ----- 
From: "Andrew Rich" <vk4tec at people.net.au>
To: "Amsat-Bb at Amsat. Org" <amsat-bb at amsat.org>
Sent: Sunday, December 23, 2007 7:39 PM
Subject: [amsat-bb] Crossed yagis

> What is the best way to set up phased crossed yagis ?
> Have an electric coax switch in the middle to switch from left to right 
> circ
> polar ?
> ----------------------------------------------------------------------------
> Andrew Rich VK4TEC
> vk4tec at people.net.au
> http://www.tech-software.net
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