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New Italy's Collinear Antenna for 27 mhz 10,40 meter lenght

Marconi said:
Jeff I also find several G-Max vs. whatever antenna on youTube, but they are all in Italian and I find it hard to get any good info even from the images.

Best I could do is try and model the G-Max collinear and see if it produces a similar far field image like the G-Max... which I think I've also seen in some video that shows 6 <> dbi gain at a very low angle at or less than 8* degrees.

Anybody willing to try and help me get some good dimensions for this monster?

I will need length and diameter for the wires.

Marconi
Click to expand...
I am helping a friend move for a day but I will see if I can look for info.
I wish I could speak Italian.
We have seen this co linear claim before.
It would be interesting to see a antenna this long pull the signal down on the horizon.
73
Jeff
 
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AudioShockwav said:
Follow up.
I have sent the manufacturer a e mail requesting a manual in English-language.
I will let you know if they reply.

73
Jeff
Click to expand...
The manual has some English in text descriptions already. It also shows some US dimensions along with the Metrics.

But, IMO the Manual is not that detailed on the various part numbers, so I have to guess and make some assumptions as I go down the parts list.

Two or three heads are sometimes better than one.
 
Here is the video I mentioned above that shows the far field pattern over Real Earth. Check about 1:50 time in the video.

 
Last edited:
I am driving.
Will look when I get home.
Reply from manufacturer.

Hello Sir
, unfortunately at the moment we are not able to ship a single piece to the USA, because the costs are very high.

I hope to find an importer in the States soon in order to satisfy the American customers.



This antenna is probably the best performing vertical in the world !! (for this band)

They included the same manual in PDF file.
Will get back with you later.

73
Jeff
 
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No rush Jeff.

Here is another modeling image that shows the performance I hope to see in a G-Max model soon. I did this model sometime back but without success.
 

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  • Diagrammi_GMAX[1].jpg
    Diagrammi_GMAX[1].jpg
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Marconi said:
No rush Jeff.

Here is another modeling image that shows the performance I hope to see in a G-Max model soon. I did this model sometime back but without success.
Click to expand...
It sure pancakes the signal down low on the horizon.
Without success as it would not match or?

I will try to figure out some measurements from the manual this weekend.

73
Jeff
 
AudioShockwav said:
It sure pancakes the signal down low on the horizon.
Without success as it would not match or?

I will try to figure out some measurements from the manual this weekend.

73
Jeff
Click to expand...
You've probably already seen these assembly videos.

Turn on Closed Captioning then go to setting and turn on auto translate and you get english subtitles.





 
AudioShockwav said:
It sure pancakes the signal down low on the horizon.
Without success as it would not match or?

I will try to figure out some measurements from the manual this weekend.

73
Jeff
Click to expand...
Jeff don't worry about the dimensions; I have the model working close, I think.

The pattern and the match is off a little, but the gain is 6.40 dbi at 7* degrees and 1.21:1 SWR @ 27.205 MHz over Average Ground.

I think a little more tuning will fix it. However, I'm concerned the gain may be inflated...due to errors so far, and the gain could suffer when the model is fixed better.
 
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Marconi said:
Jeff don't worry about the dimensions; I have the model working close, I think.

The pattern and the match is off a little, but the gain is 6.40 dbi at 7* degrees and 1.21:1 SWR @ 27.205 MHz over Average Ground.

I think a little more tuning will fix it. However, I'm concerned the gain may be inflated...due to errors so far, and the gain could suffer when the model is fixed better.
Click to expand...
Even if the gain drops a little, that big lobe at 7 degrees is impressive.
This is interesting.
Thanks for the work on this Eddie.

73
Jeff
 
I made a couple...but not in large quantity.
Actually i think i only made 3 hi.

Marconi got me thinking... I didnt remember i gave it a name...
But i did remember the "saturn" (the bi-square antenna).
So i was thinking Mercury ? jupiter?
After an hour it came back hi... "Highlander" it was.

I got the rights " from HAM international to reproduce the bigmac antenna, but made my own version first...

Yes, it does provide a bit higher gain...at low angle...
But with 15 euro's you could do similar constructing a extended double zepp antenna (see attached file) ...all you need is a long mast or tree..

Kind regards,

H.
 

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  • extended-double-zepp-11-meter2.docx
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