[amsat-bb] Re: help on antenna project

[Art McBride]

Hi All,
The radials need to remain at 1/4 wavelength long. The base of the antenna
needs to have an inductor to make the radiating element 3/4 wave electrical,
but 5/8 wave physical, thus matching to 50 ohms resistive. 
Element diameter needs to be considered in the wave length calculation. 
See ARRL Antenna Manual "K Factor"
Art, 
KC6UQH

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Nigel Gunn G8IFF/W8IFF
Sent: Saturday, March 14, 2009 8:07 PM
To: VE6ITV
Cc: Amsat
Subject: [amsat-bb] Re: help on antenna project

Multiply all 1/4 wave dimensions by 2.5 but the impedance will change and
you will then need a matching network.


VE6ITV wrote:
> Hi, i have a little fm radio station and use a 1/4 wave with radials, i
would like to know the dimensions to make a 5/8 wave with radials, any help
appreciated. VE6ITV Scott
> _______________________________________________
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