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Re: [TowerTalk] Omnidirectional antenna for domestic contests

To: jim@audiosystemsgroup.com
Subject: Re: [TowerTalk] Omnidirectional antenna for domestic contests
From: Thomas Noel <tnoel@mac.com>
Date: Tue, 06 Oct 2015 12:01:59 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Jim,

I think Herb was referring to the more nearly omni-directional pattern of an 
inverted-V as opposed to a flat-top dipole.

Thomas W Noel
KF7RSF

> On Oct 6, 2015, at 11:25 AM, Jim Brown <jim@audiosystemsgroup.com> wrote:
> 
> Hi Herb,
> 
> I just modeled a 30M dipole at 50 ft with one leg rotated 45 degrees, 60 
> degrees, and 90 degrees. Yes, the nulls fill some, but at the expense of 
> broadside gain. And, of course, it's much trickier to rig, requiring four 
> supports and/or guys in the good places. Two fans require four supports, but 
> they can be widely separated.
> 
> 73, Jim K9YC
> 
> On Tue,10/6/2015 5:51 AM, Herbert Schoenbohm wrote:
>> Can't the end null of dipoles be mitigated by putting up the dipole in a 
>> slight 120 degree V configuration.  Although I have never seen this modeled 
>> for HF,  I understand this is how broadcast FM antennas are designed to get 
>> an omni directional pattern. The same concept should work at HF as well. 
>> Right?
> 
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