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Re: phasing two arrows



I figured he planned to put them at opposite ends of a crossboom.  That
should work like gang-busters.  If you mount the antennas so the elements
for each band are at a right angle to one another polarization switching
should be pretty straight forward.    See the bad ASCII drawing below.

\                                                      /
 \   /                                            \  /
  X-------------------------------------X
 /   \                                            /   \
      \                                          /


This would be the view from directly behind the antennas.  I figure to do
something like this when my current arrangement gives up (hopefully many
years from now).

73,
Joe
----- Original Message -----
From: "hasan schiers" <schiers@prairieinet.net>
To: "Christopher Cox" <cobox@urec.net>; "Cordill,Jim" <JCORDILL@cerner.com>;
"'amsat-bb@amsat.org'" <amsat-bb@AMSAT.Org>
Sent: Thursday, November 30, 2000 5:52 PM
Subject: Re: [amsat-bb] phasing two arrows


> If you're talking about the dual band antennas, you can't stack them for
> both bands. The spacing will only be correct for one of the two bands.
>
> If you do stack two single band yagis, you have to decide on what
> polarization you want. You can get linear vertical, linear horizontal, or
> circular. The circular will require a delay line to one of the two
antennas.
>
> The dual band arrow antennas are not suitable for stacking because of my
> initial comments above. I wouldn't bother, it can't possibly work right on
> one of the two bands.
>
> 73,
>
> hasan schiers
> schiers@netins.net
> N0AN
>
>
> ----- Original Message -----
> From: "Christopher Cox" <cobox@urec.net>
> To: "Cordill,Jim" <JCORDILL@cerner.com>; "'amsat-bb@amsat.org'"
> <amsat-bb@AMSAT.Org>
> Sent: Thursday, November 30, 2000 3:49 PM
> Subject: Re: [amsat-bb] phasing two arrows
>
>
> > Well, it depends.
> >
> > Are you going to try 2 stock Arrows, or put all the 2 meter elements on
> one
> > boom and all the 70 cm on the other?
> >
> > I have not tried 2 stock Arrows, but I would make sure they where canted
> 45
> > degrees from each other instead of 90 degrees.
> >
> > If you are going to combine 'like kind' elements onto their respective
> > booms, I have had luck with using nothing more than a 1/4 wave section
of
> > RG62 joining the driven elements through a BNC T-connector. Worked
great.
> >
> > Regards
> >
> > Christopher Cox
> > KC8FRJ
> > ----
> > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >
> >
>
> ----
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>
----
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