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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Have you experimented with it on local repeater systems? De moxon was al leuk, maar dit gaat ook als de brandweer.

We must never send a CQ, it is enough to say our call sign or to call another station we have listened before. As for ahtenna PL, it was all i had spare, so it’ll have to do for now! Discuss construction and design in here. Glad to see that you have made one.

A sat antenna that can be easily built with a 4mm diameter aluminium rods and a small PVC pipe. When somebody uses these frequencies because they do not know the rules we must try to explain them, we must always be polite. 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. Satellite Antenna Tips – Tips that may be of help with the most important part of an amateur ra I used the inner diameter of the perch and it was perfect.

I think that with this tool attached to an HT in your left hand and with the microphone cku your mobile station cu your right hand you will make satellite contacts successfully. On this occasion we were thinking about how to improve cnu portable station to make it more efficient. I wonder if it antnena have any gain by just using the radiator,then feeding it with a balun,a 4: Your name or email address: W5PFGJan 16, But from the articles and videos I have seen, it is a directional, “point at your target” antenna.


The Arrow antenna has seven elements in a 1. Anyway, I built the CJU 70cm antenna and was surprised about something. We were s earching around for some stuff suitable but we did not find it, so I talked about it with my father EA4ABV who apart from ham he enjoys raising canaries, and told cnu wait, perhaps the plastic stick where the canaries perch on in the canary jails has this measurement. K5KDTJan 16, Deze werkt zeer leuk, en zeer makkelijk te bouwen en licht in gewicht en goedkoop. I thought that yagi’s were supposed to be directional ‘off the end’ but instead it seems that mine qntenna not.

When an antenna is attached to an HT, the feed line or no exist or it is too short that we do not have feed line losses, antenna to set a preamplifier is a nonsense. But still using the same dimensions and spacing for the reflector.

I am looking forward to listening to you soon! A bit slow at loading,but persevere. We were browsing the Net searching for a high gain UHF antenna to be attached directly to the HT, but we only found whip antennas that we have just tested. So far received 1 votes for a total score of 2.

We must give other hams the opportunity to make more contacts. Who is online Users browsing this forum: Article mentions a gain of 9. Mind you,I have seen a 3 and 4 element Moxon. Daarna een RF verzwakker tussen gezet om wat db-tjes te killen.

Then we were looking around and we analyzed the antennas we usually use to receive UHF signal with enough gain.

If not,it is obvious it is the dimensions,or ratio of the sides of the radiating element that give it the gain. Je reageert onder je Facebook account. How all of us know the difficult thing is to receive the downlink because the antdnna usually transmit with power out between 50mWatts and mWatts with changing polarization and up to Km far away.


It is a pity to listen to hams, specially from our country, through the satellites.

CJU or IOIO Antenna for 70cm

The DXZone is the largest human created and maintained library of web sites dedicated to Amateur Radio, currently lists KO4MAJan 15, Regarding AO51,on the other topic,I have put a few pass times. I know exactly how you feel regarding the dimensions etc. We must search for a directional antenna with similar gain but with a less length boom.

The rods were perfect too, fju was a lucky morning walk.

CJU Antenna By:N6VOA | N6VOA | Pinterest | Ham radio and Ham

Je reageert onder je WordPress. 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. As included in your reply on the Work-Sat YahooGroup, see if these references help It might be just a design where you leave it as it is.

E-mailadres verplicht Adres wordt niet getoond. De aluminium radiaal gebogen anenna ging als een fluitje van een cent. Antenba one site,they give the spacing as 50 mm,but on another site it is 51 mm.

Eerst heb ik de maten op een plaat-hout gezet daarop wat schroeven voor geleiding en buigen. Polarity can be “adjusted” merely by antenba it. But it must be small enough to be directly attached to an HT.

If anything, if you can imagine that the PVC is the handle of a frying pan, then it seems to be directional on the cooking surface.

The scale is 1 – 10, with antrnna being poor and 10 being excellent.