ฝัง
- เผยแพร่เมื่อ 9 มี.ค. 2019
- I was tested my home brew mini 9:1 UnUn with random wire antenna 17,68m long. I was located in north-east part of Slovakia about 350m a.s.l. Radio propagations was poor. I ran 5W with XIEGU X5105 transceiver. I had just one QRP QSO today with SP1MVG/FF.
I was not using the grounding on my UnUn.
I will very appreciate if you will support my work and you became to my patron on Patreon ;-) / om0et
Thank you very much for watching my videos! 73 Paul OM0ET - วิทยาศาสตร์และเทคโนโลยี
Thank you for video which will help with my learning for radio. Beautiful countryside as well.
You are in great location! Free of electrical noise. 73 from Mexico
Nice spot you found. It must be wonderful living where you do and being so close to the countryside. Thanks for the video great job 73!
Thank you Richard. Yes we live in a small city on the edge of a large Carpathian arc: upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Carpathians_dem.jpg/270px-Carpathians_dem.jpg
Its a large mountain belt with forests in the central and central east of Europe. The place where I had been is a hunting tower located here: goo.gl/maps/oRqoGDPRpuG2
Have a nice day! 73 Paul
dík za inšpiráciu. jednoduchá, a vypadá že chodí super
ja dakujem tiez za pozretie! Uvital by som aj lepsie podmienky na KV :-) ale v tomto obdobi asi marne :-) Prajem ti vela stastia! 73 Palo OM0ET
In my opinion your experiment on the first video un un 9:1 much better Paul , Best Regards 73 👍👍
Even though you were disappointed with the results, this is still an interesting video. It's good to show those times when it doesn't quite work; that's all part of the process. Great work, Paul. 73! de WX0V
Yes Scott. I had counted with not-success too...that's the QRP world :-) But this is so interesting on this activity. Never know how it will work hihi and we can still make improvements to be better next time ;-)
Interesting video, I would have liked to have seen results with ground and /or counterpoise for comparison. I'm sure some adjustments would have got it better. Not lucky with the operating conditions either. It is good to see videos where things don't work out well. We sometimes think we live in a perfect world! LOL
Hi Paul,
Very nice Video again from your new project.
Hope to hear you on the Bands, when the weather is better here in Germany, so I can do some SOTA...
that sounds great! This guy what I worked in this video was active flora fauna so SOTA cold be great too ;-) 73 Paul
Thanks for the video!
A trip to that vista would be a day well spent, radio or no radio.
I like this. You can test your antenna and deer hunt at the same time!
Thank You fur sharing!
It wasn't a total loss. You gave me the idea to use the case from my Tecsun PL 600 for the x5105 and it fits nicely. Thank you. Wait a minute. What will I use for the Tecsun now? I guess the Xiegu and Tecsun will just have to take turns wearing that case.
On another note, would you happen to know the impedence range of the X5105 tuner. It seems to tune almost anything but I'm wondering the specification and I can't find it anywhere.
Great video. 73 from VE3JGE in Canada.
Hi Paul. Fantastic location for radio. With the arrangement you are using, without a ground or counterpoise, all your equipment including even the microphone are becoming part of your antenna system. All the surplus coax you are using should be hanging out of the window and below the antenna to act as part of the counterpoise. Earth leads are essential with this setup. Karl. M0KRL.
Yeah, in some case we can use the coax feed line as the counterpoise. :-)
Great video, as the other commenters have said, you learn more from failures than success. (And I really wouldn't call this a failure.) Thank you for sharing!
Thank you for the kind comment Jonathan 😊 it's a QRP world 😁 I believe in next success 👍73 and have a nice day! Paul
@@OM0ET I'm also a happy x5105 owner and also trying to find the most minimal solution for hiking etc. I've only had it for a week and did one test, Inverted V vs No-balun random wire. Inverted V won by a long way... So now I'm looking at the more traditional end fed approaches (half wave with balun etc). Would love to see you test a known antenna vs your experiments.
Hey Paul always enjoy your projects and testing.
The case I was talking about is the pouch that you carry the X5105 in that has the Velcro flap.
I’ve look around for one but no luck so far.
I’m going to try and place a grounding nut on the radios BNC connector or somewhere else on the case to access a counterpoise wire.
One more thing, have you found any headphones that work well with the X5105. The output is 8 Ohms from the radio and most of the headphones I’ve tried the volume to be set very high to hear well.
Again, thanks for work and time to produce these videos.
73
wd4dda
Thank you very much for watching and nice comment Preston! The pouch I use is from my TECSUN PL600 shortwave SSB receiver. Is funny how perfectly fits for X5105 :-D
You don't need drill in to your radio! There is more easier way how to do. You will need T BNC connector like this:
www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=T+bnc+connector&_sacat=0
One end connect to antenna and second one to the ground wire - but without center pin in connector of course! Ground wire will be connected only to the shield or body of the BNC connector. I have done this already. It works great. You will not loose warranty. 73 Paul
Another super field video. You might try changing the length of your wire and adding a ground wire to your case.
Also you got to tell us where you got that case
Thank you Preston :-) What case do you mean - UnUn plastic case?
Was your SWR dummy load testing method incorrect in the video you showed the construction of your mini UnUn?
Great video.where i can buy this balun?
Hello Paul nice presentation, with counterpoise earth I'm Shure that 9:1 works better. I'm like what you do congratulations.
Your antenna is a non resonant antenna, hence the reason for the high SWR. You are also feeding the antenna out of phase. You will get much better results with a resonant half wave end fed antenna. BUT, it was an interesting video. I like the location. Maybe the bands will be better for you the next time you set up. Good luck and thanks for sharing.
Barry, KU3X/QRP
Super video 🙂🙂🙂🙂
73
Thank you 😊
A couple of weeks ago, I made contact with S5WDX in Slovenia? I used an G5RV Junior on the attic, and my Xiegu G90 on 20 meters.
Very nice! Good DX even with so poor propagation like this days is. With 100W?
Hi Paul, I’m really enjoying watching your videos, you inspired me to go out and get a x5105 Radio (I’m very pleased with it), I’ve built the same 9:1 unsung with the Efrw aerial, however if I get a higher swr than I want I simply hit the atu tuner and it brings it into a totally acceptable figure! I was curious as to why you weren’t using this very useful function of the x5105? God bless, Bill G6ATO
Bill, I believe you will need a 1:94 with EFHW. 1:9 will work with a (not really (check the tables)) random wire-----------. Edit 1:49
Hello Paul, can you tell me how you made this, i would like to make an EXACT one of this antenna
NICE VIDEO , I M SURE UPTILL YOU HAD DEFINITLY FOUND EXACT POINT ERROR , 73S
Did you try 71 feet on the antenna? It seems short for 40 and 80m
I am not surprised that 80 and 160 meters is high. The antenna is approximately 1/4 wave at 80 meters, so it will be a weak antenna there anyway.
So how does the scale work? I see 1 at the bottom, but 5 ticks to get to the #5. Is the $5 5:1 or 1.5:1? If it is 5:1 where is 2:1?
hello my friend
I need a multiband antena for my station.Y have only 22m long maxim in my lot,what is the better a long wire with a 9:1 or 49:1 unun
thank you
ct1drx
Did your other unun with yellow toroid tested at qth with 450 ohms and gave perfect swr on all bands too ? Or it was showing wrong results but worked best in the fields
Both toroids gave passed 450 ohm test, but material is not good. I recommend FT50-43.
found for myself tohigh noise and that in the fields ??
Where did you get the pouch to carry your radio? Thank you for your time Paul.
I have got this pouch with my TECSUN PL600 receiver. It fits perfectly on the X5105 too :D
OM0ET I have one of those. Thank you. I think people would love to have a piece of equipment with your call sign on it.
@@tommycheshire5508 thanks! 😊
In my humble opinion, the better solution is to use a wire that you resonate on the lowest F band of interest and use it with a multi-tap UNUN for a multi-band, no tuner needed solution :)
Bonjour de la France ,quel est ce récepteur merci ,
Add a counterpoise rather than using the coax shield and I bet it would be great
yes next time I will make a better grounding and hopefully it will work better :-)
OM0ET surely a simple mod to add a ground tap and you could keep the gorgeous tiny form factor
Nice place to be - unless you're a deer during the wrong season, I guess. :)
From the video it looks like you didn't bring your counterpoise wire. That along with with the elevated position might just be the reason why the antenna decided to not really cooperate. I think you should just try that again with the counterpoise dropping straight to ground from your UnUn.
:-D ...btw. I met 3 young deers on my way up there but pity is that I hadn't much time to record them on camera. Next I will use better grounding on my antenna and hopefully the propagations will be better :-) 73 Paul
@@OM0ET Yeah, it's been getting warmer, but it appears that the ionosphere didn't quite receive the memo yet. A critical frequency of merely 2.5 Mhz or so well after sunrise, like it has been lately can really ruin a QRP wire enthusiast's day. You get this tiny window in the afternoon to play a bit on 40 meters, and that's about it. Unless you get off the ground to get a flatter takeoff angle, something you don't really have much control over when portable, you're simply screwed in conditions like that,and I am not sure the owner would have appreciated you attaching a mast to his treestand to raise your antenna's feedpoint. Could have been an entertaining video, though. You don't get to watch ham operators dodging shotgun pellets very often. ;)
@@KannixKostnix :-D :-D Thank you for the nice comment! I believe in better futures :-) and hope for better propagations soon. In summer will be Es so it could be better for QRP. 73 Paul
Hello Paul damage for the swr and propagation otherwise the site has 320M asl looked friendly best 73 of ON4LBF
LOL :-) I like that place, I met also 3 young deers...my new subscribers probably :-D hihi 73 and thanks for comment! 73 Paul
Hallo , chtel bych se zeptat da se tento balun koupit , a jak by to bylo s postou. Byvamm tady ve svycarsku,ale mam znameho ktery je ze Slovenska,a jezdi castu domu. Ja, a momentalne on zejime ve svycarsku, poblize Bernu. Diky za odpoved.
Zdravim. Jeden balun som v piatok posielal do Kanady a vyšlo ho to na 30€ s poštovným. 🙂
Presnejsie za 32€
Hey mate its ok to not be happy with the result. Try different radiator length or counter poise see if you can improve it. Be interested in see next TH-cam thanks for posting.
Thank you :) yes I will... I used 17,678m long radiator/58ft. Maybe I should try 45,110m/148ft and good counterpoise or better grounding :-) 73 Paul
FB Paul! I3DGF qrp Piero
can it be for RIG Alinco DR135 MK II radios?
The Alinco DR135MKII is a VHF transceiver so no, it is not for your transceiver. For VHF radios are recommended the vertical antennas or directive beam antennas - Yagi's for example ;-) 73, Paul
Your previous version of the antenna had a 41 meter wire, that's about 135 feet, 1/2 wave for 80 meters. But this antenna is only 22 meters or about 72 feet. 66 Feet or 20.1 meters is 1/2 wave for 40 meters. The length of this antenna was not in the harmonics of the ham bands, and certainly not cut for 80 meter band.
I think for an accurate comparison, you need to compare the unun with a 41 meter wire like you used for your first two versions.
It's an older video. Things has changed. Today I use only 17.6m long wire. The base version is 44m long wire, 300W.
Where to get this antenna?
= Pd3bl
Bel video quanti metri di filo
Nice place to try again, I can understand your disappointment with the results. Check Gilles YT channel (RadioPrepper) maybe he has some hints I know he has made a 9:1 unun and does a lot of end fed's but he seems to recommend 1/2 wave length wire. So maybe that and/or the ground will be the answer. Good luck!
It's the QRP world 😁 I want to made 49:1 transformer and half wave wire. It don't need ground and has better efficiency. I am curious how this will work 😊 But all depends on propagations... 73 Paul
@@OM0ET Oh yes your right it's a 49:1 he made but it's basically similar in deisgn just a few more windings! :) And then a collection of wires tuned for each band.
Try to lenghten the wire to 27 meters. It worked fine (Even in 160 m), and be sure to have at least 10 meter feedline(Acting as counterpoise), before put a line-choke. Thanks fpor sharing your experience. LU1AR
thanks I will try 27m too ;-)
Perhaps you must run a little longer -and non resonant- wire. There are tables, indicating optimal lenghts for 1 to 9 UnUn. One of them, sugested 11 meters line. but 16, 15 meters looks as optimal, from 160 to 10 meters bands. Thanks for sharing it. LU1AR
Thank you. Yesterday we were on the Field day with this antenna and 1.5m above the ground hight we made QSO to Puerto Rico in central america on 50W on 20m band! 😃 Thanks for comment and 73!
A quarter-wave counterpoise for the band in use will solve all your SWR problems. Thanks for the video and vy 73 from G4FSN, near Manchester UK.
@@ericwalton1492 Usually, you can choke the feedline 1/4 wave downline and let the coaxial act as counterpoise. Vinyl jacket has 90%VP. You must set the choke 9 meters down, in 40 meters. Regards. LU1AR
@@edgardomaffia5356 That's true, what you say, but I just have about four different counterpoises in my bag, and connect the one you want to the earthing bolt on my rig. I think counterpoises are better run along the ground, as long as you position them where no-one can trip over them!
Hi mate the wire is way too low to work well! If you want to try you can either fix the wire higher and make a 64:1 trasformer and build an EFHW antenna. About 10m wire it is fine for 14mhz. With a little coil and about two meters more wire, i work qrp DX in 20 40 and 10. Find projects for EFHW! 73 de IU2IJW
I'm thinking the feed point needs to be closer to the ground and the end of the wire higher
yes it is possible. I agree. If so, would be also easier to ground this antenna. Shame was raining during this test and I had to get cover at this cabin and transmitting from there.
Learning ham radio things are neat but all these metric measurements are the most aggrivating thing, I have to take those sizes in metric and look on the internet and cross them over to SAE
Where can i buy that?
I am not selling these due to lack of the small toroids. 🙂
@@OM0ET Yea... no offense - kinda like doing show and tell - and getting everyone excited with a jab in the side - that yea.. .I have this but you can't - lol Sorry just saying. no worries - though I saw another channel that had a spark plug like balun that was being offered for sell. =
Sorry but showing things on my channel doesn't means automatically I am selling this things 🙂
well its normal that ATU is used with random wire antennas....
Yes
Throw the balun in the trash put a atu in its place.
That is a good point, but not everyone has portable transceiver with ATU :-) In my videos I experiment with antennas which no need ATUs. ;-) My next try will be 49:1 transformer and half wave wire. 73 Paul
Prosim te , mohl by jsi mi napsat na olda.kryl@bluewin.ch ?