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.
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On one site,they give the spacing as 50 mm,but on another site it is 51 mm. 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.
Then we only had a way, to improve the antenna. I wonder if it would have any gain by just using the radiator,then feeding it with a balun,a 4: AntemnaJan 17, Eerst heb ik de maten op een plaat-hout gezet daarop wat schroeven voor geleiding en buigen.
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A bit slow at loading,but persevere. But it must be small enough to be directly attached to an HT. Coax kabel eraan …Antennemeter erop, en over de gehele 70cm goed. As for the PL, it was all i had spare, so it’ll have to do for now! 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 cnu. Does anyone know what the theory behind these antennas is?
Geef een reactie Reactie annuleren Vul je reactie hier in Your name or email address: De CJU antenna voor 70cm word veel gebruikt voor satelliet verbindingen.
But in our minds were the same question, Would dju work? This kind of behaviour interferes with satellite communications making them more difficult that they are. I see rg recommended also – do you concur?
As included in your reply on the Work-Sat YahooGroup, see if these references help I know exactly how you feel regarding the dimensions etc.
KO4MAJan 15, I’ll shorten it first to see how that works. The rods were perfect too, it was a lucky morning walk.
Dus was ik snel klaar. Discuss construction and design in here. So far received 1 votes for a total score of 2. I take advantage of this opportunity to say hello to all hams who work this mode and all the hams from Vegas Altas del. This link is listed in our web site directory since Tuesday Dec 3and till today ” The CJU Antenna ” has been followed for a total of times.
Get our latest news and links in your email. So we became again searching for a linear polarized UHF yagui, because if we work with a hand held antenna, to install a circular polarized one is a nonsense. The Arrow antenna has seven elements in a 1. E-mailadres verplicht Adres wordt niet getoond.
Je reageert onder je Facebook account. We can not expect to hear it clearly, we will have to make an effort to pick the modulation up from the noise and we must add that we have to change the polarization and the frequency to face to the Doppler effect.
Polarity can be “adjusted” merely by twisting it. We must take a lime flower tee before pushing the Ahtenna the first time, because when we listen to our self modulation you will get nervous and you will not be able to say your locator and report signal properly which are the minimal dates to validate the contact. I will give the calculator another go today. I would be happy just to know what the dbd gain was,I cannot even find that out.
Just joking regarding the PL But from the articles and videos I have seen, it is a directional, “point at your target” antenna. The FM LEO satellites are one channel device, so we must not take much time than necessary to make a contact.
It might be of anrenna to you, http: Who is online Users browsing this forum: Regarding AO51,on the other topic,I have put a few pass times. I used the inner diameter of the perch and it was perfect.