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Re: [TowerTalk] Phased Vertical Follow-up

To: "larryjspammenot@teleport.com" <larryj@teleport.com>
Subject: Re: [TowerTalk] Phased Vertical Follow-up
From: jimlux <jimlux@earthlink.net>
Date: Sat, 14 Mar 2009 20:02:53 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
larryjspammenot@teleport.com wrote:
> I've been wanting to try a pair of phased Butternut HF6V vertical antennas 
> for 40-Meters, mounted on my garage roof. I already have them, that's why I'm 
> looking at Butternut. The garage is 40 feet long, so I trust there's enough 
> spacing for proper operation. 
> 
> Looking at that Hy-Gain Engineering report for Amateur Phasing (I picked up 
> my copy back in the 1960's), I know any verticals should work okay, not just 
> the Hy-Gain ones. However, since that report and procedures info for phasing 
> two or three vertical antennas was written, there have been improvements to 
> the test procedures, computer modeling, and probably much discussion as to 
> how best to tackle a simple 2-antenna vertical array used for just 40-Meters. 
> That Hy-Gain report is given in the last four pages of the link shown 
> earlier. I'd be interested in any suggestions or improvements before I look 
> at doing it as shown in this Hy-Gain report.
> 
>
What about the scheme in the ARRL antenna compendium from the EE prof.. 
Basically a pi network that gets adjusted and a DPDT switch to flip the 
phasing.  You adjust for a null on the desired station, then flip the 
switch.


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