Does anyone know what the theory behind these antennas is? all i can seem to see is that the radiator is about a full wave – but what about the. Ok, I know I just posted about Moxon antennas, but doing an image search for moxon antennas led me to the CJU antenna. Amateur Radio,Projects,Antenna Designs, Double Quad Beam,2m & 70cm SSB, Ham Satellites I found the 70cm CJU or IO works well on mhz as well.

Author: Mizilkree Moogule
Country: Greece
Language: English (Spanish)
Genre: Business
Published (Last): 13 December 2015
Pages: 187
PDF File Size: 13.84 Mb
ePub File Size: 2.49 Mb
ISBN: 397-4-11380-977-8
Downloads: 39227
Price: Free* [*Free Regsitration Required]
Uploader: Mik

The following frequencies are exclusively for satellite use: But somebody could say that a HF station is simpler to work, I disagree with this opinion because if you have a PC which aims the antennas at the moving satellite and changes the frequency, we only must talk, our reliable friend the PC will do the hard work.

But in our minds were the same question, Would it work? We were browsing the Net searching for a high gain UHF antenna to be attached directly to the Antsnna, but we only found whip antennas that we antenns just tested. Webmaster, add a Remote rating The CJU Antenna – related links We thought you might also be interested in these additional web sites, selected from the same category: Have you experimented with it on local repeater systems? We must give other hams the opportunity to make more contacts.

Glad to see that you have made one. Do you enjoy making your own equipment or antennas?

CJU or IOIO Antenna for 70cm

Discuss construction and design in here. Imagine the drawing of the antenna on a flat piece of paper and the piece of paper is what I pointed at the satellite.

  2N7002 NXP PDF

K5KDTJan 17, This antenna has a bit less gain than the seven elements Arrow antenna because the IOio antenna is equivalent to a four elements yagui antenna, but we have experienced that it has enough gain to receive the satellites comfortably. Nearly forgot,did it work ok for you. De moxon was al leuk, maar dit gaat ook als de brandweer. Well, in a couple of afternoons I have just built the prototype, now Pedro EB4DKA had to test it because he is the expert at working in portable conditions.

Our website is made possible by displaying online advertisements to our visitors. But still using the same dimensions and spacing for the reflector. I thought that yagi’s were supposed to be directional ‘off the end’ but instead it seems that mine is not. To sum up, we must try to improve the UHF received signals.

CJU Antenna

Get our latest news and links in your email. Hier wat informatie wat ik over de CJU tegen kwam op internet.

I’ll shorten it first to see how that works. Only a suggestion,it might have been more practical to have left some extra conduit next to the radiator,this will give you space to play with a director.

CJU antenna – Transmission1

I know exactly how you feel regarding the dimensions etc. On this occasion we antennx thinking about how to improve our portable station to make it more efficient. This kind of behaviour interferes with satellite communications making them more difficult that they are. Polarity can be “adjusted” merely by twisting it.

Mind you,I have seen a 3 and 4 element Moxon. The scale is 1 – 10, with 1 being poor and 10 being excellent. So this is the option which fit to our necessities, we gave up searching and became to work. Real Hams review new sites every day sincefor potential inclusion in the Directory, and to evaluate the best place to list them.


Door antennx te gaan op deze website, ga je akkoord met het gebruik hiervan. I just got my ticket a antenma ago and have had a blast so far though I haven’t talked to anybody yet.

Pedro EB4DKA and I usually have long conversations and we always have the same idea on the brain, to make the ham satellites easier to work so more people will be able to work them.

Regarding AO51,on the other topic,I have put a few pass times. You need to learn some skills to work satellites so at the beginning you must listening several passes before you push the PTT.

I bet you wished that I had not brought the aerial to your attention. Would it also work if the radiator was mounted at right angles to the reflector.

Later in January 2. Ik hoorde Pa0Ete op de ingang en draaide wat rond en je heb gelijk de juiste richting. Coax kabel eraan …Antennemeter erop, en over de gehele 70cm goed. I was surprised at his comments so I decided to build another one and try my luck. Je reageert onder je Twitter account. I ccju wish there was more information regarding the theory behind it and why the spacing between the driven element and reflector is what it is etc.

It sounds like a problem with the reflector size or spacing De aluminium radiaal gebogen dat ging als een fluitje van een cent.

K6LCSJan 15, Geef een reactie Reactie annuleren Vul je reactie hier in On one site,they give the spacing as 50 mm,but on another site it is antennq mm.