[TowerTalk] Omnidirectional antenna for domestic contests

Thomas Noel tnoel at mac.com
Tue Oct 6 15:01:59 EDT 2015


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 at 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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