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Old 18-10-2006, 06:38 PM
Doug
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Join Date: Mar 2006
Posts: 645
G'day Jerry, you said:
Quote:
But why would you want to feed the antenna from the centre? You could find a point away from the centre where the resistance is closer to 300 ohms.
Well 75 ohms anyway.
Interesting observation Jerry, and were it a conventional Yagi I would agree without much reservation. A TV Yagi (I think) is a bit of a "this goes with that" array. (in no sence is it log periodic) Impedence would be anything but flat over the bandwidth in use. So strictly speaking a good match is only a pipe dream no matter what you do unless you want to switch in tuned matching sections for each station. Frankly program content is not worth the effort.
Cheers,
Doug
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