[TowerTalk] vertical antenna question

[Dan Hearn]

Tony your antenna sounds like one of the 43 foot "160thru 10 meter " jobs. I
have put together a discussion of that antenna on our club web page
www.sdxa.org  If you click DX Tips on the right side you will find it. The
feed point impedance is no where near 50 ohms on any band,  Properly matched
it should work reasonaby well on 40 and 20 if you have a good radial system.
On higher bands it is a cloud warmer with its high angle of radiation. On
the lower bands its radiation resistance is very low resulting in poor
efficiency with any practical radial system

On Thu, Jan 20, 2011 at 6:02 PM, <john at kk9a.com> wrote:

> How tall is your vertical?  I'm guessing that it is too short for 80m and
> that you'll need more than just ground radials to make it an efficient 80m
> antenna.
>
> John KK9A
>
>
>
>
> To: <TOWERTALK at contesting.com>
> Subject: [TowerTalk] vertical antenna question
> From: "K2VI" <k2vi at cox.net>
> Date: Thu, 20 Jan 2011 18:42:09 -0500
> List-post: <towertalk at contesting.com">mailto:towertalk at contesting.com>
>
> I finally put the antenna up. Set up the radial plate and ran 85' of davis
> bury
> flex to the shack. The swr on 80 meters is 6.0:1 and on 40 meters it is
> 2.4:1.
> Making a contact on 80 1300 miles away my dipole fed with ladder line 50'
> inverted vee did 1.5-2 S units stronger than the vertical. Now if a had a
> full
> compiment of 60 radials would this bring up the signal with that distant
> contact? Just want to make sure the radials will help also help the SWR on
> 80.
> With my tuner i can easily tune down to 1:1.1. thanks for any help.
>
> tony k2vi
>
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