[TowerTalk] Question on Multiple Inverted L Antennas

[Al Williams]

 Isn't an inverted L antenna just one (Unique) configuration of a top hat 
vertical?

k7puc


----- Original Message ----- 
From: "hasan schiers" <schiers at netins.net>
To: "Robert Chudek - K0RC" <k0rc at pclink.com>; <towertalk at contesting.com>
Sent: Friday, July 14, 2006 7:03 AM
Subject: Re: [TowerTalk] Question on Multiple Inverted L Antennas


> Inverted L's have similar bandwidth to a 1/4 wave vertical...and it isn't
> "real broad" without excessive return loss. All measurements need to be 
> made
> at the feedpoint. I've done radial studies on my Inverted L and as radial
> numbers increase, vswr bandwidth DECREASES, exactly as it should. I made
> measurements of feedpoint Z at resonance and 2:1 vswr bandwidth with the
> following number of radials:
>
> 0,2,4,6,8,12,16,26
>
> VSWR bandwidth was best with 0 radials (DUH...lots of resistive loss!)
> Feedpoint Z dropped from 79 ohms with 0 radials to 29 ohms with 26 
> radials.
> The predicted Rrad is 25.4 ohms
>
> 73,
>
> ...hasan, N0AN