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For a half wavelength antenna I am no longer sure that you need that "other half" that I have personally said myself in the past you need. Marconi's video reminded me of a diagram I've seen where an end fed half wavelength antenna is coming off of a single feed from a parallel feedline, and the other feed is not used (or it just stops). After doing some looking around I have found those diagrams and did some reading.

In the third edition ARRL antenna book it talks about feeding a half wavelength antenna with parallel feedline. It doesn't have an "other half" attached to the other wire in the feedline, that wire simply stops where the half wavelength antenna begins. It also shows diagrams that show the current layout for a correct and both incorrect (long and short) versions of such an antenna. It also talks about using a quarter wavelength multiple of feedline for connecting such an antenna to a tuning device for easier tuning. Yes, I said quarter wavelength multiple there, not half wavelength multiple.

If I get some time tomorrow I'll see about typing it in and scanning in the two figures to see if it is relevant to the discussion.

The DB

<blockquote data-quote="The DB" data-source="post: 437547" data-attributes="member: 21346">For a half wavelength antenna I am no longer sure that you need that &quot;other half&quot; that I have personally said myself in the past you need.&nbsp; Marconi&#039;s video reminded me of a diagram I&#039;ve seen where an end fed half wavelength antenna is coming off of a single feed from a parallel feedline, and the other feed is not used (or it just stops).&nbsp; After doing some looking around I have found those diagrams and did some reading.In the third edition ARRL antenna book it talks about feeding a half wavelength antenna with parallel feedline.&nbsp; It doesn&#039;t have an &quot;other half&quot; attached to the other wire in the feedline, that wire simply stops where the half wavelength antenna begins.&nbsp; It also shows diagrams that show the current layout for a correct and both incorrect (long and short) versions of such an antenna.&nbsp; It also talks about using a quarter wavelength multiple of feedline for connecting such an antenna to a tuning device for easier tuning.&nbsp; Yes, I said quarter wavelength multiple there, not half wavelength multiple.If I get some time tomorrow I&#039;ll see about typing it in and scanning in the two figures to see if it is relevant to the discussion.<a href="http://hittman.us" target="_blank">The DB</a></blockquote>

[QUOTE="The DB, post: 437547, member: 21346"] For a half wavelength antenna I am no longer sure that you need that "other half" that I have personally said myself in the past you need. Marconi's video reminded me of a diagram I've seen where an end fed half wavelength antenna is coming off of a single feed from a parallel feedline, and the other feed is not used (or it just stops). After doing some looking around I have found those diagrams and did some reading. In the third edition ARRL antenna book it talks about feeding a half wavelength antenna with parallel feedline. It doesn't have an "other half" attached to the other wire in the feedline, that wire simply stops where the half wavelength antenna begins. It also shows diagrams that show the current layout for a correct and both incorrect (long and short) versions of such an antenna. It also talks about using a quarter wavelength multiple of feedline for connecting such an antenna to a tuning device for easier tuning. Yes, I said quarter wavelength multiple there, not half wavelength multiple. If I get some time tomorrow I'll see about typing it in and scanning in the two figures to see if it is relevant to the discussion. [URL="http://hittman.us"][COLOR="Black"]The DB[/COLOR][/URL] [/QUOTE]

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