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Re: [TowerTalk] Liberal Arts Question - More Info aboutDipoleAntenna

To: kdutson@sbcglobal.net, towertalk@contesting.com
Subject: Re: [TowerTalk] Liberal Arts Question - More Info aboutDipoleAntenna
From: "Tim Kass" <timkass@hotmail.com>
Date: Thu, 01 Jun 2006 18:50:03 -0400
List-post: <mailto:towertalk@contesting.com>
Remember, when you bend a dipole to an inverted Vee configuration, that 
lowers the impedance, to about 50 ohms...I would go with the interaction 
with other very close metal objects...tower...

73, Tim
K8WBL


>From: "Keith Dutson" <kdutson@sbcglobal.net>
>To: "'TowerTalk Reflector'" <towertalk@contesting.com>
>Subject: Re: [TowerTalk] Liberal Arts Question - More Info about 
>DipoleAntenna
>Date: Thu, 1 Jun 2006 14:13:00 -0500
>
>If you are looking for values for your antenna, only use the transmission
>line to connect the analyzer.  Adding other components distorts the true
>antenna values.  Even a very long transmission line distorts (lowers) true
>VSWR.  Looking at this another way, if you are satisfied with true antenna
>resonance and VSWR, then your rig and other components should be happy too.
>If not, there is likely a setting that is incorrect (or a malfunction) in
>one or more of the components.
>
>73, Keith NM5G
>
>-----Original Message-----
>From: towertalk-bounces@contesting.com
>[mailto:towertalk-bounces@contesting.com] On Behalf Of Lee Buller
>Sent: Thursday, June 01, 2006 11:20 AM
>To: TowerTalk Reflector
>Subject: [TowerTalk] Liberal Arts Question - More Info about Dipole Antenna
>
>As per my previous post.....on my Inverted Vee Dipole.....
>
>   I borrowed a MFJ 259 (Plain Model) and measured the antenna from the 
>Shack
>end.
>
>   Resonate Freq = 7030 or so
>   SWR is 1.5:1
>   Resistance is about 28 ohms
>
>   When I install the antenna  through through the BW Switch, PalStar Tuner
>(Direct), the SWR Bridge, the AL80A and to the end of the coax going into
>the PROII... I get the following reading.
>
>   Resonate Freq = 6.968
>   SWR 1.6:1
>   Resistance is about 45 ohms.
>
>   HMMMM.....so what can you swamis - gurus - experts - science types tell 
>me
>about that.  Obviously, I am adding coax and a whole lot of other junk in
>line.  It looks like the antenna is plenty long....and it never makes 50
>ohms....nor does it make 70 ohms as some have suggested.
>
>   Lee Buller - K0WA
>   "They did not have antenna theory in my Liberal Arts Major"
>
>
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