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#1
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Cecil Moore wrote:
Dave wrote: Sonny, the feedline cannot and does not have any influence on the resonance of an antenna. Resonance is determined by the physical dimensions of the antenna itself. Feedline length has every influence on the resonance of an antenna system if the SWR is not 1:1. C'mon Cecil, you know better! The antenna is resonant 100% by itself. 100 feet of wire is resonant within a few KHz of 4.68 MHz. Period. 120 feet of wire is resonant at ~ 3.9 MHz. Period. 65 feet of wire is resonant at ~ 7.2 MHz. Period. 33 feet of wire is resonant at ~ 14.2 MHz. Period. You are tuning a non resonant antenna to resonance with your stubs. You changed the scope of the discussion with the exact wording of your response. You used "antenna system". I used "antenna". Why do you persist in comparing alligators and kittens? |
#2
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Dave wrote:
The antenna is resonant 100% by itself. Most knowledgeable people know that the resonant frequency of the antenna system can be changed by the length of the transmission line series matching section. Why don't you know that? Here is the SWR of my 130 foot dipole antenna on 40m achieved by varying the length of the 450 ohm transmission line. http://www.qsl.net/w5dxp/swr13040.gif Please look at that graph and then tell us that the feedline cannot tune the antenna system to resonance. -- 73, Cecil http://www.qsl.net/w5dxp |
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