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Homer, I agree that should, would, or could change the match for two reasons.

1. I think the down radial under the feed point is a 1/4 wave stub that is feeding the antenna, working against the mast as a ground. This match is similar to the old Zeppelin and the feeder used on the Signal Engineering's voltage fed Quad design. I'll post a picture of it, if you would like some close up detail to dual polarity feed your quad.

2. This idea is also noted and well detailed in the A/P's patent to change the feed point match.

What I probably meant to say earlier in this regard, was that the model did not appear to respond to that type of adjustment when I first tried it. I'll have to recheck all the dimensions and angles like I did the other day with my I-10K. The only reason I didn't per sue this adjustment idea further is because changing this particular model in that area involves changes to at least two of the radial wires and all of the wires for the loop...and that gets complicated trying to do it manually, and keeping all the wires connected like they should be.

Right now this model is showing an SWR match of 1.339 at the feed point, but the source is not precisely at the same point as it is on the A/P. It is close though, and I think the length of those radials would surely change the source location.

<blockquote data-quote="Marconi" data-source="post: 364209" data-attributes="member: 903">Homer, I agree that should, would, or could change the match for two reasons. &nbsp;1. I think the down radial under the feed point is a 1/4 wave stub that is feeding the antenna, working against the mast as a ground. This match is similar to the old Zeppelin and the feeder used on the Signal Engineering&#039;s voltage fed Quad design. I&#039;ll post a picture of it, if you would like some close up detail to dual polarity feed your quad.&nbsp;2. This idea is also noted and well detailed in the A/P&#039;s patent to change the feed point match.&nbsp;What I probably meant to say earlier in this regard, was that the model did not appear to respond to that type of adjustment when I first tried it. I&#039;ll have to recheck all the dimensions and angles like I did the other day with my I-10K. The only reason I didn&#039;t per sue this adjustment idea further is because changing this particular model in that area involves changes to at least two of the radial wires and all of the wires for the loop...and that gets complicated trying to do it manually, and keeping all the wires connected like they should be.&nbsp;Right now this model is showing an SWR match of 1.339 at the feed point, but the source is not precisely at the same point as it is on the A/P. It is close though, and I think the length of those radials would surely change the source location.</blockquote>

[QUOTE="Marconi, post: 364209, member: 903"] Homer, I agree that should, would, or could change the match for two reasons. 1. I think the down radial under the feed point is a 1/4 wave stub that is feeding the antenna, working against the mast as a ground. This match is similar to the old Zeppelin and the feeder used on the Signal Engineering's voltage fed Quad design. I'll post a picture of it, if you would like some close up detail to dual polarity feed your quad. 2. This idea is also noted and well detailed in the A/P's patent to change the feed point match. What I probably meant to say earlier in this regard, was that the model did not appear to respond to that type of adjustment when I first tried it. I'll have to recheck all the dimensions and angles like I did the other day with my I-10K. The only reason I didn't per sue this adjustment idea further is because changing this particular model in that area involves changes to at least two of the radial wires and all of the wires for the loop...and that gets complicated trying to do it manually, and keeping all the wires connected like they should be. Right now this model is showing an SWR match of 1.339 at the feed point, but the source is not precisely at the same point as it is on the A/P. It is close though, and I think the length of those radials would surely change the source location. [/QUOTE]

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