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I'm not so sure. These 1/2 wave antennas like the Antron, are simply 1/2 wave dipoles fed at the end, hence an "end-fed half wave". You can feed a dipole anywhere along it's length; all that changes is the feed-point impedance. When fed at the end the feed-point impedance climbs to somewhere around 600 ohms or so, hence the need for a matching network.

As far as the TOA exhibited by any half-wave antenna, I'm less concerned with the actual TOA, than I am about the actual RF Field emitted by the antenna. I'm saying that these 1/2 wave jobs seem to concentrate the field closer to neighboring houses, as opposed to the horizon. I'm not sure why this is. My 5/8ths wave Penetrator seems to get out farther, and interferes less with neighbors electronics. Hmmm...

<blockquote data-quote="VA3ES" data-source="post: 299356" data-attributes="member: 15532">I&#039;m not so sure.&nbsp; These 1/2 wave&nbsp; antennas like the Antron, are simply 1/2 wave dipoles fed at the end, hence&nbsp; an &quot;end-fed half wave&quot;.&nbsp;&nbsp; You can feed a dipole anywhere along it&#039;s length; all that changes is the feed-point impedance.&nbsp; When fed at the end the feed-point impedance&nbsp; climbs to somewhere around 600 ohms or so,&nbsp; hence the need for a matching network.As far as the TOA&nbsp; exhibited by any half-wave antenna,&nbsp; I&#039;m less concerned with the actual TOA, than I am about&nbsp; the actual RF Field emitted by the antenna.&nbsp; I&#039;m saying that these 1/2 wave jobs&nbsp; seem to concentrate the field&nbsp; closer to neighboring houses, as opposed to the horizon.&nbsp;&nbsp; I&#039;m not sure why this is.&nbsp; My 5/8ths wave&nbsp; Penetrator seems to get out farther, and interferes&nbsp; less with neighbors electronics.&nbsp; Hmmm...</blockquote>

[QUOTE="VA3ES, post: 299356, member: 15532"] I'm not so sure. These 1/2 wave antennas like the Antron, are simply 1/2 wave dipoles fed at the end, hence an "end-fed half wave". You can feed a dipole anywhere along it's length; all that changes is the feed-point impedance. When fed at the end the feed-point impedance climbs to somewhere around 600 ohms or so, hence the need for a matching network. As far as the TOA exhibited by any half-wave antenna, I'm less concerned with the actual TOA, than I am about the actual RF Field emitted by the antenna. I'm saying that these 1/2 wave jobs [i]seem[/i] to concentrate the field closer to neighboring houses, as opposed to the horizon. I'm not sure why this is. My 5/8ths wave Penetrator seems to get out farther, and interferes less with neighbors electronics. Hmmm... [/QUOTE]

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