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Well, I hit "Post Reply" and POOF! it was gone.

The AP feed point is direct-drive and therefore must be about 50Ω making it likely a max current node, then it goes down, around & back up where it shorts directly to the grounded mounting bracket so it's rather necessary that point be max current/ MINIMUM voltage.
- For that to be the case it would need to be an electrical 1/2 wavelength from the feed point.

I still believe it's merely a folded 3/4 wave - finished by a cap hat, and having zero mast should make zero difference. I also believe you're getting incorrect SWR values from your model.

...looking forward to trying it.

[QUOTE="Needle Bender, post: 590910, member: 13339"] Well, I hit "Post Reply" and POOF! it was gone. The AP feed point is direct-drive and therefore must be about 50Ω making it likely a max current node, then it goes down, around & back up where it shorts directly to the grounded mounting bracket so it's rather necessary that point be max current/ MINIMUM voltage. - For that to be the case it would need to be an electrical 1/2 wavelength from the feed point. I still believe it's merely a folded 3/4 wave - finished by a cap hat, and having zero mast should make zero difference. I also believe you're getting incorrect SWR values from your model. ...looking forward to trying it. [/QUOTE]

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