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Re: [TowerTalk] Combined Dipoles

To: John Tait <johnei7ba@eircom.net>
Subject: Re: [TowerTalk] Combined Dipoles
From: Forrest Wolf <forrestw@gbis.com>
Date: Wed, 16 Apr 2008 10:48:03 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I'm using a tri-band V, that has two Vs.  One is cut for 80 & the other 
is 20/40.

It's coming down, all the parts are here  :-), in favor of this one:

http://www.cebik.com/gup/gup5.html

This is working great @ a # of locations.  The reason I'm changing is to 
pick up the gain on 20m.


73 de N7LD


John Tait wrote:
> Bill Turner wrote:
>   
>> ORIGINAL MESSAGE:
>>
>> On Tue, 15 Apr 2008 11:34:51 -0700 (PDT), Larry Boekeloo
>> <lboekeloo@sbcglobal.net> wrote:
>>
>>   
>>     
>>>  If I cut a dipole for 80 meters, 40 meters and 30 meters and connect them 
>>> all to the same balun, would they at some point resonate on the correct 
>>> frequencies with some tweaking?
>>>     
>>>       
>> ------------ REPLY FOLLOWS ------------
>>
>> Yes, they will work very well indeed. My low-band antennas here are
>> three inverted vees connected together just as you describe. I have 160,
>> 80 and 40 meter antennas with the apex at 70 feet and the elements
>> fanned out so they are about 20 feet apart at the ends. When I first put
>> it up I expected a lot of tuning would be required because of
>> interaction but there was remarkably little tweaking required. 
>>
>> For anyone running high power, I highly recommend this instead of a
>> trapped dipole/vee. Over the years I have smoked several traps that
>> supposedly were rated for 1500 watts, but this antenna really is capable
>> of full legal limit, brick on the key, no problem at all.
>>
>> 73, Bill W6WRT
>>     
>       My 160,80 and 40m dipoles are at 45ft, with the widest angle 
> possible between dipole legs. As Bill says, this system works very well. 
> Mine has almost 1:1 SWR on all three bands. Check out all the other 
> bands too, as you may find that it works on some other bands with a good 
> SWR. Mine works well on 30m, and very well on 17m. What extra bands you 
> get will depend on height, angle between wires, location etc etc.
>   I mainly use it for local QSOs, as I use vertical dipoles for Low Band 
> DXing.
>     Vy 73
>        John EI7BA     http://www.iol.ie/~bravo/
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