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Seriously? Ok, how about this one, a 5/8 wavelegnth, with no radials, and a single 1/4 wavelength section below the antenna simulating putting a choke 1/4 wavelength down the coax from the antenna. The mast is isolated...

The top half wavelength is a given phase. The remaining part of the 5/8 wavelength element is out of phase, as expected. As you pass the feed point onto the lower element, the phase does not change, thus the area immediately below the feed point on a vertical 5/8 wavelength antenna, will always be out of phase with the upper part of the antenna no matter how long that feed line/mast are. The best you can do is to manipulate the length of said wire to put a phase change right next to the feed point of the antenna.

The DB

<blockquote data-quote="The DB" data-source="post: 549065" data-attributes="member: 21346">Seriously?&nbsp; Ok, how about this one, a 5/8 wavelegnth, with no radials, and a single 1/4 wavelength section below the antenna simulating putting a choke 1/4 wavelength down the coax from the antenna.&nbsp; The mast is isolated...<img src="http://hittman.us/pictures/3-25-16/14wlm.jpg" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" />The top half wavelength is a given phase.&nbsp; The remaining part of the 5/8 wavelength element is out of phase, as expected.&nbsp; As you pass the feed point onto the lower element, the phase does not change, thus the area immediately below the feed point on a vertical 5/8 wavelength antenna, will always be out of phase with the upper part of the antenna no matter how long that feed line/mast are.&nbsp; The best you can do is to manipulate the length of said wire to put a phase change right next to the feed point of the antenna.<a href="http://hittman.us" target="_blank">The DB</a></blockquote>

[QUOTE="The DB, post: 549065, member: 21346"] Seriously? Ok, how about this one, a 5/8 wavelegnth, with no radials, and a single 1/4 wavelength section below the antenna simulating putting a choke 1/4 wavelength down the coax from the antenna. The mast is isolated... [IMG]http://hittman.us/pictures/3-25-16/14wlm.jpg[/IMG] The top half wavelength is a given phase. The remaining part of the 5/8 wavelength element is out of phase, as expected. As you pass the feed point onto the lower element, the phase does not change, thus the area immediately below the feed point on a vertical 5/8 wavelength antenna, will always be out of phase with the upper part of the antenna no matter how long that feed line/mast are. The best you can do is to manipulate the length of said wire to put a phase change right next to the feed point of the antenna. [URL='http://hittman.us'][COLOR=#000000]The DB[/COLOR][/URL] [/QUOTE]

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