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Old November 3rd 07, 06:33 PM posted to rec.radio.amateur.antenna
James Barrett James Barrett is offline
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First recorded activity by RadioBanter: Oct 2007
Posts: 21
Default question about wire antenna and tuner

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Cecil Moore wrote:
Highland Ham wrote:
Cecil Moore's web site shows how he adds lengths of twin feeder to
suit the different bands.


If the SWR on 450 ohm ladder-line is between 4.5:1 and
18:1, the impedance at a current maximum point will be
resistive between 25 ohms and 100 ohms for an SWR on
50 ohm coax of 2:1 or less with no tuner. See the Smith
Chart at: http://www.w5dxp.com/smith.htm


This thread has taken on a life of its own since I posted my first
question. I really don't understand any of this. I thought that I wanted
an antenna with zero reflected energy or as close to that as possible.
Now it sounds like that is not always the case. I need to learn all
about SWR and impedance in regards to Antennas, from start to finish. Is
there an easy-to-read tutorial out there for a beginner like me? Maybe
Ham Radio for Dummies has something about SWR and antennas?




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