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George, this isn't you, is it? Fire Fart I couldn't help but laugh.

Here's a good 'read' to start out your antenna hobby on the right foot. Windom off center fed I call it an "antenna hobby" because there's basically nothing more that can be done to radios or mics, so the antenna is the last semi-mystery to be discovered, enjoyed & re-worked / re-tuned until...

I'd like to know the correct number of inches the radial hub should be installed below the SO-239 connector bracket. I used Liquid electrical tape when I built Darrin's, Mark's, Ron's & Mike's to seal it from the rain. I simply painted it on the top side of the connector where the wire is...

Yes Oggy, I find it the most intriguing thing to happen to 11m in decades. I love antennas and antenna theory so seeing a company implement an old idea in a way which exemplifies logistics which have gone unused until now is very exciting for me and is certainly stirring things up! I guess...

So how would one move that reverse phase to the center and away from the tip? Now here I disagree, like a full wave antenna won't radiate because the reverse current cancels the forward current even though they are one above another, and not parallel lines. No, I'm not certain, but I bet it's...

Marconi, I could make a 50' antenna last through 100mph winds if I wanted to, I don't see why they couldn't simply increase the base diameter tubing a size or two and use perhaps a few more sections in order to achieve durability if that's the issue. Sure it might cost more, but I doubt it would...

Odd, if the currents are aligned as that single frame Vector CST image shows, then why shrink it back down to a seemingly lesser-gain 1/2λ over a 1/4λ when the longer 5/8λ over a 1/4λ version should show gain and a lower TOA? Which brings to mind another set of questions: - With only a...

I thought of another good reason to consider the Top One / AP design, IF it's as good as your tests have shown, Marconi... When your limited to a maximum height by local statute. If it's as close to the SGM as your test show, then getting it's high feed point within 4' of the maximum ceiling...

Thanks for the reply, and that's a good report in comparison to the Wolf .64.

Thanks for the reply Shockwave, and how long is the one you used to compare to the SGM? How can I get the full active simulation of the CST model?

Accidental double post

No I haven't seen the model SW posted, could you add a link to that post? I did find this post during my research and I suppose it is an old, out-of-date post from back when the design wasn't fully understood because it states the bottom ¼ wave doesn't radiate according to testing with a field...

Am I the only one who has to keep signing-in every 5-10 minutes? - It's getting frustrating. :cursing: Well, since they have such an incredible test facility, I guess I'll just set it to what's working for Sirio and set to their overall dimensions for their "New Vector 4000". I really just...

I don't yet ascribe to your feed point theory simply because it's the entire antenna, not the feed point, that radiates and I believe it's more about pattern than feed point / match design, etc. I'm going to re-assemble the Saliut and check it's radiation with a field strength meter so I'll be...

Since I intend on testing one for cone radiation with a field strength meter, and the one I have in it's entirety is a 7/8 Saliut, should I assemble it: 1) As a .82 like the one Shockwave said not to? 2) As a stock 7/8 Saliut? 3) As a newer 3/4 like the latest version of the Vector? I want...

OK Marconi, I'm looking forward to the I-10K & SigmaIV comparisons! I hope you can try the SGM & the SigmaIV with their tips at equal height. And it sounds like the surprisingly competent AstroPlane / Top One would be great for mountain top or other high elevation installations where height...

I'll have to get my iCOM over to my Buddy's tech bench and inject a signal while watching the meter reading, especially around 10-over-S9 where it was reading during my comparison of the P500 vs SGM. If my 751a reads like his 730 then I'm only seeing about ½ of that perceived ~5dB gain, which...

George, what I liked was the idea of moving the bottom 1/8 wave into the center. I knew when I read that description that it would have to work well. BUT, (and supporting what you just mentioned) the first time I read the SGM webpage I closed it prematurely as soon as I saw the words, "The new...

Hey Bob, I sure got a different take on Dave's comment. :huh: I thought he was referring to other companies designers now having to come out with something radical to best the SGM.

I'll have to disagree with that, check out this link; "...My dozen or so receivers (Drake R4C's, IC-751A's, Yaesu FT1000D, Collins 75S and KWM-2, etc) all range from about 1 or less dB per S unit at S1, to maybe 3 or 5dB per S unit near S-9."