Sandbagger
Administrator/The Boss
Posts: 6,250
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Post by Sandbagger on May 5, 2015 12:47:53 GMT -5
Looks good, but I'm willing to bet it won't work as well as your Sigma 4 clone. I had an Astro Plane before I got the Sigma 4, and the AP performed worse than a standard 5/8 wave GP. The Sigma 4 was about 1 S-unit stronger than the 5/8th wave. I miss HomerBB. He always had an interesting antenna project going on. I wonder what happened to him?
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Post by cbrown on May 6, 2015 8:37:40 GMT -5
I'm not sure, I used to see him on another forum, but I can't recall if I've seen anything from him recently there either. Will look and report back.
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Sandbagger
Administrator/The Boss
Posts: 6,250
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Post by Sandbagger on May 6, 2015 11:28:52 GMT -5
I'm not sure, I used to see him on another forum, but I can't recall if I've seen anything from him recently there either. Will look and report back. Yea, and if he's still active on other forums, I'd be curious as to the reason he stopped participating here. Let him know we miss his contributions.
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Post by cbrown on May 7, 2015 8:26:03 GMT -5
He hasn't been on the other forum since February.
I'll send him a note there and see.
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Post by nathan on Feb 15, 2021 10:30:12 GMT -5
So I saw the aluminum tape post and thought I'd try it. I changed it up after I realized I had gotten in a twist and glued my fittings wrong so I figured I'd keep going. It works nicely anyway. It's a little shorter than the real one in height, but it gets good reports. Swr is not bad, 26.965 is a 1.7 and it goes down the higher you go. It was lower on the ground before I put it up. It needs to be higher over the roof than where it is, but I ran out of mast. I'll post a picture if I can find it. I'll build another one for fun and mix the original measurements and the one I goofed and see what happens. I'd love to get someone to model it in software to see what it says. Pic of my tin foil and factory Astros side by side ibb.co/CtFF209
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Post by Retro Grouch on Apr 10, 2022 13:32:18 GMT -5
I've got a radio shack rotor that once turned a 2el Quad. I may try it on my 4el Yagi. Got the Atroplane above the Yagi for a workout. To the tip-top it is 57' To the coax connection it is 53' To the bottom ring it is 45.5' Hey Homer, I know this thread is ancient history but I'm wondering what your impression was of the Astro Plane, once you got it elevated, in terms of performance compared to a full length 5/8 or a Vector4K?
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Post by tubefan on Apr 10, 2022 13:50:24 GMT -5
Just google Homerbb astroplane. He is all over in the forums. He loves the Astroplane as do I. If you get it high enough it will keep up with the best of them.
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Post by Retro Grouch on Apr 15, 2022 4:12:52 GMT -5
Just google Homerbb astroplane. He is all over in the forums. He loves the Astroplane as do I. If you get it high enough it will keep up with the best of them. Thank you for your response, but since I found him here and don't have interest in continuing to search and post there and search and post somewhere else, basically chasing him around - lol... If he doesn't respond here to his email alert then I guess I'll just move on, but I was hoping to hear from him so I could ask how the AP performed compared with a full size 22' 5/8 in terms of the donuts of cancellation which seem to accompany the 5/8 - due to the upper angle reflecting off the ionosphere and intermittently cancelling the fundamental or lower angle energy. I experienced this last night driving home from the valley and our mutual signals faded for a couple miles then returned for a couple miles - and this occurred several times as I drove the 95 miles home, running a Firestik mobile antenna (which, interestingly is 5/8 wave of wire wrapped around fiberglass) and him on a full size 5/8 base antenna. I wonder if most antennas with a split in the TOA energies might not experience the same effect (depending of course on the ionospheric charging and layer elevation) leaving the 1/2 wave as perhaps the only style radiator with more of a smooth and consistent E-plane TOA energy, such as what I would expect the AP to produce.
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