[amsat-bb] Re: Question adding RHCP to Cheap Yagi

[Greg D.]

Hi Curt,

For CP you would either have the elements offset and feed them in-phase, or have them not offset and feed them with the phase delay.  You want to create a spin to the wave as it travels down the boom.  I expect doing both would make a mess out of things.

Greg  KO6TH


> Date: Fri, 2 Jan 2009 10:19:23 -0500
> From: cptcurt at flash.net
> To: amsat-bb at amsat.org
> Subject: [amsat-bb]  Question adding RHCP to Cheap Yagi
> 
> Good Morning All:
> 
> I've been using a 10el version of Kent Britain's Cheap yagi for my 70cm 
> downlink antenna.  It suffers from deep fades so I am going to add the 
> second yagi with physical offset to get to RHCP in the x config.
> 
> Question is:
> 
> normally I would reverse the coax connections to a dipole driver but 
> this is a hairpin (half of a folded dipole. )
> 
> Do I reverse the connections as normal?  Kents instructions just say 
> offset the elements and feed in phase.
> 
> Thanks
> 
> Curt
> KU8L
> 
> 
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