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Re: [TowerTalk] Inverted L Question

Subject: Re: [TowerTalk] Inverted L Question
From: Joe - WDØM <>
Date: Fri, 29 Aug 2008 15:02:08 -0600
List-post: <">>
If you can, move the bottom of the vertical section in/out from the base 
of the tower (assuming it's on one) to see if that change the SWR - does 
on mine.  You may also want to try changing the horizontal length if you 
have/have access to an antenna analyzer.


Joe Hannigan - WDØM
Pagosa Springs, CO

> I realize this is not a tower question, but the antenna gurus hang out here.  
> Hopefully some bandwidth can be tollerated for an antenna question. 
> I am working on a 160 meter inverted L and having some difficulty getting the 
> match correct.  I'd appreciate any input. 
> 175' total wire length.....100' vertical 75' sloping horizontal 
> 23 (qty) 130' radials. 
> Fed with 75 ohm cable hardline through a variable capacitor. 
> I've trimmed and extended the vertical section and adjusted the cap with each 
> length change.  The low swr point is always 2.8:1.  Essentially the only 
> thing changing is how 
> much the capacitor meshes.  
> I started with 16 radials and thought adding more would help the match, but 
> it has not changed. 
> Any Ideas? 
> All advice appreciated. 
> Thanks, 
> Dennis N4DD


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