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Old March 30th 07, 03:54 PM posted to sci.electronics.design,sci.electronics.basics,rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Mar 2007
Posts: 118
Default All HF Band Feeline Tuned antenna

After reading your webpage more closely......

On Fri, 30 Mar 2007 10:42:26 -0400, Buck
wrote:


http://www.w5dxp.com/notuner.htm


I see you use 450 ohm ladder line (or window-line as some call it.) I
am wondering if the concept will also work with other impedance
feedline such as 600, 300 or 75 ohm twin-line or even possibly with
coax. ****


Does the feedline act as part of the antenna? I am sure it will, at
least up to the 'no-tuner' if it acts like a G5RV, but do you know if
the feedline radiates?


That answer would be 'no'. I see that the purpose of the feedline
length is to get the maximum current at the center point of the
dipole.




I see a couple of the frequencies are above 1.5:1, which I am not
comfortable going over with solid state rigs. Do you think that could
be fine-tuned with the addition of a 1/2 foot section or maybe with
that and a 1/4 foot section?


Based on the fact that the antenna is being fed maximum current at the
center, I would guess that this should work.





Buck
N4PGW


--
73 for now
Buck, N4PGW
www.lumpuckeroo.com
 
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