[TowerTalk] 43ft Vertical Feeding Question and Balun type

[Greg - AB7R]

I have a friend who I helped install one of these antennas along with 32 radials, 
most of which are ~32 feet...some 60ft.  Your 4NEC does not reflect real life what 
is seen at the radio end using a 4:1 balun by balun designs.  If I remember 
correctly the worst SWR was aroun 5:1 but I don't recall what band that was on.  
His tuner allowed him to tune on all bands...except maybe 160.

I know many people say it would be no different than just running a 43ft vertical 
wire and employ it in the same fashion....which I suspect is true.  But not 
everyone has supports available to install a 43ft vertical wire.  This is where 
this stout vertical really comes into play I think.

I don't have one as I do have some supports available.  But if I didn't, I think I 
would try one.

-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065


On Thu Nov 20  7:55 , Rick Stealey  sent:

>
>Michael,
>It would sure seem to me that a 43 ft vertical is essentially a random length 
antenna.  
>I saw the web site too where they offer a balun to go with it.  "It tunes all 
bands"
>they say, WITH YOUR TUNER in the shack, or at the base of the antenna !!!
>I did a quick and dirty check with 4NEC and got 122-j466 at the base on 20 meters, 
>an swr of 38:1 !  A sweep shows an SWR of >9:1 from 7 to 15 MHz.  
>On 40 m you get 150+j210, an swr of 9:1
>On 80 you get 17-j257, an swr of 79:1 !!
>So it would seem to me you have a lot of work to do to match this thing at the 
base.
>It would not be a good idea to run coax straight into the house with a 79:1 SWR
>and hope a tuner will fix things.
>I know there is a guy in Chicago on 20 meters running one of them with no radials 
>who comes into NJ 20 over 9 at times and claims no knowledge as to how he does it.
>Guys he talks to rave about his rock crushing signal.  Wouldn't it be 
>interesting to compare his signal in real time with his neighbor running a beam, or
>a quarter wave vertical.  I mean.... the laws of physics haven't been rewritten
>lately have they, and I missed out on it?
>Rick  K2XT
>
>
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