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Re: [TowerTalk] screwdriver ant vs 75m dipole at 40"

To: Al Williams <>
Subject: Re: [TowerTalk] screwdriver ant vs 75m dipole at 40"
Date: Fri, 02 Jul 2010 17:45:45 -0400
List-post: <">>
The dipole is at 40 INCHES height?

If you're comparing a dipole at 40-FEET above ground with a  
mobile-type antenna, the Dipole will surely be more efficient for all  
intents and purposes.

Remember, the angle of radiation is what is important ... a vertical  
will radiate most energy BELOW 50 degrees while a LOW dipole will  
radiate MOST of its energy 'straight up'.


Quoting Al Williams <>:

> Last evening a couple guys ran a test of signal strength of the two   
> antennas with several stations separated from 10 to 200 miles apart.  
>   The dipole was about 2 s units stronger at all locations.
> I suggested that the screwdriver be laid over horizontally to then   
> compare to the dipole.  Alas, I forgot that a low horizontal antenna  
>  suiffers efficiency so that laying the screwdriver over at its   
> typical mounting height may not be a valid comparison?
> They plan to run the test again tonight but with the screwdriver   
> horizontal  but at what height I don't know.
> comments?
> k7puc
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