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Marconi,
About that thing with adding elements to a driven element and changing it's resonance. Adding those elements won't change the driven element's resonance frequency, but it will change it's impedance at the feed point, it will lower it. That can certainly change the SWR, but has no affect on resonance. (SWR has nothing to do with resonance, as you know.) If that 6 foot length of coax included with that antenna just happens to be 75 ohms with a VF of .66, you'd have a 1/4 wave transformer which would raise that lower than 50 ohm input impedance to something closer to 50 ohms. Right??
- 'Doc

[QUOTE="W5LZ, post: 207081, member: 129"] Marconi, About that thing with adding elements to a driven element and changing it's resonance. Adding those elements won't change the driven element's resonance frequency, but it will change it's impedance at the feed point, it will lower it. That can certainly change the SWR, but has no affect on resonance. (SWR has nothing to do with resonance, as you know.) If that 6 foot length of coax included with that antenna just happens to be 75 ohms with a VF of .66, you'd have a 1/4 wave transformer which would raise that lower than 50 ohm input impedance to something closer to 50 ohms. Right?? - 'Doc [/QUOTE]

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