4 Element Yagi Beam DIY
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- Опубліковано 8 лип 2024
- Unit 63, Operator Paul of Columbia SC shares how he made his home brewed Direct Feed 4 Element 1/2 beam for less than $200. After testing it in the driveway on a 5 ft. mast he had so many requests for the specs he decided to share this video. Feel free to email him to get all the details from element size to hardware.
Email: unit63SC@gmail.com
Nice! Good job building that antenna. I just shared this video on My Community tab. Take care 63, 73's from 151 SC.
I finally got it out of the driveway and it's on the roof flat side with a 1.2 SWR with power. Hey 151 thanks for the kind words! I should have mentioned you because you also had a lot to do with me building this. I watched a couple of your antenna videos! 73's
This is what it’s all about !! Enjoying and experimenting, and sharing ideas and knowledge. Thanks for posting that 151 👍
Very cool, Thanks for posting this. I heard you on 38 LSB around Fathers Day. (could of been the day before or after, don't remember. Had some decent skip those few days) You were talking to someone about your homemade 4 element yagi. I could only hear your half of the QSO. You were booming into my radio here in Central New Jersey. Tried to make contact with you but couldn't get through. You gave reference to this video about the antenna. Glad you did its a great build. Not to mention this beam talks. You made the trip here no sweat above everyone else, and it was busy. Thanks for helping the community with this. 974, Twin Mill in Central NJ saying 73
You can’t be radio friends with Mower Junkie and not get inspired to make a home brew CB antenna 😂😂.. looks great , can’t wait to see the next video . Great job
Thanks for the flowers!!
Well done! I'm collecting parts to built a 3 element myself. Thanks for sharing! 295 on the rocky coast of Maine 👋
Email me for the specs and components and source list
just finished my own 11 element vertical yagi works great very narrow beam
Nice job Paul! Talked to you the other day and you were blowing smoke! Regards, Operator Russ RT966 Toronto,Ontario,Canada
excellent work, working on a beam, this might be a better direction thanks, appreciate your work and diligence.
hello Paul,nice job on your home brew beam..i like to watch you younger guys and your idea's,..its better for more bandwith,with the larger diameter tubing..and as far as the end caps on the ends of the tubing ,critters will get into the elements and gradually change your swr....good luck great job.i am also a former cb radio operator,......now ive been a ham for 55 years ,,,retired good luck enjoyed your video.
Thanks Ray I appreciate the advice. 73's!
I currently run a homebrew "droopy drawer" design 1/4 wave at 20'. Have a .64 Crossbow that I just cannot get to tune so have put it on the back burner for now. A friend recently gave me a Maco 3 element beam, but has none of the clamps to install the radials. This is the best video so far, that shows how the direct feed needs to be seperated. Hoping I can find thos saddle clamps locally. Thanks.
Nice video I understand it well.good details on all of the build.thanks
Awesome video. The grounding part of the video is good info. Thx man !
Nice video very educational looking forward to the next one.
Just sent you the PDF with all the details!
My anT 🐜 TeN nA much different from this one ☝️ Homie Brew Antenna ch 6 ch 11 aM CB
Very nice build !
I worked on cell sites to several years ago. Ive got about 40 of the silver plated n connectors and i used the lmr400 i had left over on my beam lol its nice to get free parts. good job on the antenna. It’s been a while since I’ve talk to you. 73s WR125 Ky
4-Roger Larry! We should get some conditions soon. I'll be listening for you!
I have being running drive feed antennas for more than 20 years now, I think you need a ground from the ground side of the element to the boom of the antenna to have it working properly.
#7 Jamaica Click Click bom bom.
Well done on this build and the video. We talked a few times before. Unit 415 bennington, VT base & Troy, NY Mobile. My next project is building something like this. Thanks for the info!! 73's
My pleasure 415! Conditions are changing and we should hear more north south soon. 73's from Paul 63 SC
Thank you so much for sharing
73's QRO from France
Almighty bunghole unit 23 former unit 867-5309, we just had a qso 5 minutes ago. 73 Paul!. Great setup, i use a inv.vee just 10ft over ground. 9+10!
Great job on that antenna, thanks for sharing. Good talking to you last night from up here on the mountains of Montana. Operator Steve-431 Yellowstone Valley Radio.
Thanks Steve - It was my pleasure as well!
Hey 772 looking at YOU my brother. Mr. Motor Mouth Paul I'm gonna copy this now thank you. QUACK QUACK!!
Very nice Antenna.
The direct feed was perfected by G0KSC the original OWA low impedance Yagi back in 2010 or so .You still need a CMC at the feed? The boom is not long enough and the first director has to come in much closer to the driven ele achieve the direct feed 50ohm match 😎
Unit 63, hello from Unit 21. Nice infromation on this video. I am about 100+ miles down south from you. I hit all your buttons, and #31 like. Stop in sometime 0n CH 12. to say hello. Dr. Pain near Cola is a good friend of mine. Old Radio Night Sat. 8pm, 21
Nice job
I just finished building a Moxon for 11m today and now half my recommended videos are for antenna builds , oh well , at least I get to see a few new call signs to look out for . 73's to everyone from KAFL 2775 Southwestern PA
question has anyone built a MOXON with directors?
I'm looking at a stacked 2 element Moxon for my next antenna!
thank you i have been interested in ant.for nearly 50 years , i retire in june , should hv time to play...thanks again
Lonny
Have you done a video? I'd like to build a 10 or 11m moxon
Hey 63 what's up man. This is 1963 Jamaica. Take care my friend
Hey Mr. 1963 where have you been? We haven't qso'd in a while. Always great to hear you in there! 73's
Thank you.
Thank you for sharing. 73 from PY5WHO
Awesome to have found you on UA-cam. Spoke to you back in April out of Fort Jackson on Tank Hill in my mobile if you remember? Just this weekend I was speaking to Ottawa, Canada and they were also talking to you. 893 BACKSLIDER out of Fort Stewart, GA
yep I remember you from the mobile on Tank Hill! From Savannah. 73's!
Yes Sir look forward to some more QSO again. 73s back to you. Thanks!
Paul, Thank You for the quick reply to my email, Very Much Appreciated !!! 672 SW Kansas
great job!!!!
Very interesting!!
Nice 4 element flatside dipole
Good job! The only thing I didn't see or hear is what the spacing between the elements is/was.
I sent you spec sheet. Good luck!
63 getting it done! 73 from 497 Brandon
Four Nine Seven! 73's
Realy important information you have left out.
Please give the spacing
You can get u-bolts, clamps, hardware at Tractor Supply for a reasonable cost.
What is the spacing between the elements please. I'm building it today.
Super Job on that I had a beam like that . A ham made my like that but ran half wave coax going at 24 feet a run so my was 144 feet on my coax he put wooden dowels in my tubing to keep all of them lookin at each other and fishing line tip to tip with like 90 lb fishing line to all coax and bolts he put that CLean zip-a-way removing weather stripping on all of them if it ever needed to be removed it jest pop off clean not like black tape acts like ok have fun dx;ing in 11 73's Pam 2VOW505 Wisconsin VOW is Voice of Wisconsin
Yagi antennas are awesome! Good job on the build. What's the bandwidth like on it? I thought about building one a while back and will have to do it. 1 reflector, 1 driven element and 2 directors make decent gain as well.
26-28 Mhz
just built a peg leg 1/2 wave and going to make beam next
Great job! How does a folded dipole element work? surely then the center and shield of the coax are effectively shorted together in that configuration.
@simon hanlon :
Actually, there's a 43" X 1/2" fiberglass rod between the two pieces of the driven element to provide insulation between them.
If you mean a folded dipole is a short, it's because RF behaves differently compared to a DC. You probably should read up on a little basic RF theory. Furthermore, a folded dipole will have a much higher impedance than a half wave dipole. This can be taken advantage of with yagi design because of mutual conductance. Folded dipoles also have a greater bandwidth and, arguably, greater capture (full wave), and may even be quieter.
They use to be a fella handle was rifleman that built these 4/5 element beams around us I'm in Asheville north Carolina and I have something similar to these if you could by writing could you tell me the spacing of this antenna sir the length of the elements and length between each one if you can't I do understand
Don't want to burst your bubble but the feed will allow common mode currents to flow on the outside of the coax the gama would prevent that so will ferrite beads or most any 1:1 choke but without any you will receive and transmit both polarity and receive as well as give interference . most noise is manmade and vertical so you will get a higher noise floor too . try to install a proper matching device there not difficult and will allow you to get more out of your antenna . Dipoles are balanced antennas even on a directional and coax is unbalanced so a value is always nessacery
Nice homebrew build. At 10:24, a male and female N connection would be be best.
As a recent acquaintance has told me and he seems to know quite a lot, is that what the elements you're talking about in the kit that step down in size of tubing it's to compress the signal and you want to compress the signal as small as you can... But if I hadn't heard from someone I couldn't have told you and I don't know yet but if you were to cut those elements down and step them two sizes down should be super beneficial; compressing the signal a whole bunch, in turn greater performance all around distance whatever as I understand it. But you have one built and I don't, have a 24 ft beam in the yard but I have no elements haha.
That's a load of bull. I've never heard something so ridiculous in radio, this takes the cake.
@@arconeagainTypical C.B. jargon !
If anything, the stepping down in element size, is more mechanical, than electrical !
Having said that, a larger diameter element, will get you more Band width !
" Compressed Signal " ?
Sounds like maybe some confusion over Beam width ?
All a part of element spacing, and boom length !
As easy as it is to get an Amateur Radio license these days, I don't know why these guys that are so interested in building antennas, don't get their Ham license, and get with people who truly know and understand how this stuff works ?
🤔.....?
Just Say'n !
(((---_---)))
I
I
@@sleeve8651 yeah that's right on the mechanical properties and bandwidth theory. Although I don't see it imperative to get your ham licence. I'm a CBer, and am more knowledgeable on antenna theory that most hams. You can learn these things outside of ham radio, I've been studying, building and testing antennas since I was a teenager. My current choice of horizontal antenna is a 4 element LFA.
Personally, I will never become a ham, even though I could get my advanced licence in a heartbeat. It's worth realising that there are other professions and qualifications that, by far, outrank a ham too, even my electronic engineering education puts me in good stead. I have found the best source of untainted knowledge and theory is from old school military vets. Crucial information that will soon be lost.
@@arconeagain Not to be argumentative, but the Advanced license class hasn't been available for at least 2 decades !
But to your point, it is simply up to the individual !
But with your statement of having an
" Engineering education " (?)
( Not mentioning a formal degree ), struck me as curious, only because living near a Major EE School, and having met many of the students there, it just kinda comes with the territory !
As one seemingly begets the other !
And knowing there are many
fields of Electronics unrelated to RF, it would be foolhardy to believe all blossoming Engineers would gravitate to achieving an Amateur Radio license !
As to my point, I was simply pointing out, that your chances of finding the correct answer to a particular answer, would be to choose from an educated pool, instead of the " Guess and Be Damned, Follow the leader group " !
Which was demonstrated in the comment I answered.
That's all !
No more, no less !
But Thanks !
@@sleeve8651 my inaccuracies in amateur radio licensing demonstrates how little I care or have involvement in ham radio. I mean, why would I know the difference, or changes over the years when I have absolutely nothing to do with it? In saying that, there is amateur radio outside of the US, naturally. And it turns out in Australia, my country, there is in fact, currently, an advanced license.
In regard to engineers, well it would seem that term is dropped more casually and more often in the US (I'm assuming you're American) than Australia. I did complete half or more of my electronic engineering degree. To say this has little to do with RF theory or of little help is ridiculous. What I have learned in complex electronics and mathematics, even basic electrical theory (some struggle with ohms law, which everything comes back to) puts me well ahead of most. I have a much better grasp on things in general, and the experience, I know what's really going on instead of skipping to the end with some formula. Don't forget we learn all about inductors and capacitors early on, we learn how to calculate capacitance and inductance from the raw thing (sound handy for antenna design/construction?). We obviously learn about power, calculating peak and RMS and the difference, basic circuit analysis, resistivity which is good for calculating losses in RF with skin effect in mind, basic waveform and AC analysis. I can easily transpose complex formulas, simplify and expand, including algebraic. The list goes on, and that's real basic stuff, my advantage also being that I can do it and understand it in its entirety without having to think about it. It's called an education.
Appreciate the video Unit 63. This video answered a lot of my questions. Can this antenna work in a vertical position? 818 in the Magnolia State
Yes you can use it vertical. Email me for the specs if you want them.
Best 😊 73 51 from Palle 47AT124 in north Denmark
wheres the gamma match? does it work well>?
Unit 63, how did you come up with the spacing and lengths of the elements? If antenna modeling software, which do you recommend? Thx
I got this design from an operator in FL.
Paul, did you put a rotator on it?
If so, which one?
Or did you build that too?
I'm using an RCA rotor with no issues. Just make sure you open it up and tighten screws and add locktite. This is a light beam.
Now that you've finished playing around with your 'antenna', your wife says she'd appreciate it if you'd fix the fence and paint the garage doors! 😁
But seriously, the only thing I question is how long it will be before the pigtail attached to the ground side of the driven element (6:29) shorts out on the threads of that u-bolt.
You know, with all that rotating and hurricane winds and stuff.
Last question: Is that a river or a pond in the backyard, and are there any fish in it?
The fence is gone and I'm getting ready to paint that side of the house lol. That's a pond with nice bass, bream, cats and crappie. I insulated the ground over the U-bolt with coax outer insulator.
@@unit63sc17
Be careful when you do that painting!
I heard of one guy who fell off the ladder and almost got hurt, but fortunately he landed in a chair which just so happened to be in the radio shack in front of the radio. Imagine that!
How did you get the swr down without a gama match
Read up on mutual conductance.
VERY NICE well explained Sir. i just want to know which bands is the antenna for? thank you and will try this someday when i find some aluminum tubing supplies. 73 de KH2ZZ
10-11 Meters
So, after 1 year, how is the antenna doing? You like the performances of it, what are the specs DB gain, Fb gain .......did your try an antenna program to see the lobes ????
The antenna is fantastic. I don't know what the DB gain is on it but it's got to be real good. I haven't tried a program to see the lobes but it has great side rejection and is a wide beam. This thing rocks
I am sure we made a few contacts in the past. 🇦🇹🇺🇲🍻
Hi, I was wondering because of the many beam antenna's on the market, what is the difference rx/tx between a d-pole, 2, 3 or a 4 elements antenna or a vertical antenna? 73.
Forget all that stuff, for the best signal, what you want is a Henway.
Nice Job!! Greetings from Gus 35DR001/P 🇦🇹 73 🍻
Really cool build
How much of a difference donyou notice compared to what you used to use?
I was running a vertical A99. There is no comparison. If I'm giving another station 7dB on A99 I'm giving the 10-20 dB on the 4 element. The receive is 50-75% better also. And most of the time much higher signal to noise ratio.
@unit63sc17 so awesome. I'm gonna use wire but I intend on making one
Open feed with a eye connector..might work for a while at qrp ..but do not try to but power threw that feed....
Putting a KW through it no problem.
Wow I'd be afraid of it breaking down ..well that's great !!! I would.asume u weatherd it ...wow that's great ...I love the antenna ...
It's been up there for a couple years now. Still broadcasting like a big dog!
Hi Paul how's you I think stateside falling out hopefully hear you soon 73s 108AT134 with the big wave 😊
Hey Graeme hope all is well!
@@unit63sc17 Cheers Paul propagation changing had some sporadic e the last few days short skip into Europe 73s take care
Ok I'll be listening for you brother. 73's
hola podrias compartir los planos o medidas para fabricarla saludos desde santiago de chile ...73
Spacing between elements
Please let us know that
Could u pm the specs I am going to build one thank you .
I subscribed! I am wondering how this beam has held up?
I've got it mounted to the Chimney with 3 Rohn 3" offset wall mounts secured by masonry screws
Still going strong after 2 years
I like that already send it email to you thanks att manny D.R
Unit 63, I got the measurements you listed in this video, bur what is the distance between the elements on the boom if you dont mind me asking ??? 672 SW Kansas 38 LSB I sent you a EMail also
Great question. I included everything in a PDF. Send me an email at unit63SC@gmail.com and I'll send it to you.
73 My friend 671 Waveing from the Queen City of Buffalo N.Y.
73's 671!
Some of this is okay as far as educational steps go, but my advice to everyone is to skip ahead and just build an LFA. I'd go with a 4 element, it will blow any of these, and most other antennas, out of the water.
What frequency does it talk on.?
@Tyrone T Brown :
It's built for 10/11 meters.
Approximate frequency range would be a large chunk of 25.2 -29 MHz. .
As thick as the tubing walls are, it's gonna have a lot of bandwidth.
663 Wavin from California Dreamin USA 🇺🇸 do it … AM style
Did your swr go down after getting on your roof?
yes 1.1 - 1.2 with power
@@unit63sc17 nice!
Where do you adjust the SWR?
This is a direct feed with no tuner for swr. If you make it to the specs the swr will be less than 1.5
Uranus.
@@arconeagain Your wife's uranus
👋
Thanks 24 southern Idaho
Nice antenna 63 maybe you can point it down south and talk to this old hillbilly in the bam 73s
How do you go by lowering the X= the R= 50
A resonant antenna has no reactance, and then there's mutual conductance. Also, there's a common misconception about what the capacitive side of a gamma actually does, this predominantly coming from hams (I'm a CBer). Do yourself a favour and look up how a gamma really works (not on UA-cam!), it's rather interesting, and clever.
@arconeagain Good morning thank you for the reply I've done a little more tweaking it's a 1.2 and it's flickering 1.1 but as is it's swr 1.2 R=49 X=9 OHM 50
@@rayjohnson7886 I didn't realise you were trying to tune one. How are you measuring it? Right at the feedpoint or via a half wave/s of coax??
@arconeagain Hairpin I adjusted the reflector a little bit the spacing not adjusting the length of it.
@@rayjohnson7886 but where is the analyser being placed?
Hey I’ve talked to you, lol 73s
73's!
Will never last! The way that driven element is drooping I give it a one good storm and that fiberglass rod will splinter and break! The elements are all too heavy and you should have used something like 6063-T832 drawn aluminum tubing in telescoping diameters for strength and survivability! Telescoping elements are stronger than a solid tube as there is less stress along the length of the element.
Your driven element is a split element (dipole) and it needs a current choke to keep common mode currents from traveling down the outside of the shield and getting into your home electronics and especially your radio equipment. There is nothing more fun that getting a RF bite caused by CMC's in the shack!
Balum balanced to unbalanced
Balun
Yeah, I'm thinking that with a 1.2:1 SWR a balun shouldn't be essential.
@@daleallen7634 he's talking about a 1:1 current balun to address the common mode current. The term balun literally derives from the two words balanced and unbalanced. Whenever you feed a balanced antenna with an unbalanced feedline like coax, you should keep this is mind. At minimum, a coaxial choke. Personally, with my LFA, I run a substantial ferrite, coaxial choke. Incidentally, you say the SWR is low, well CMC can and will affect these readings.
Ahahahaha oh really dude, It's not neat or nice, It's so poorly construct, so where is the gamma match ??. It's all twisted up and down, Honestly I make far better home made antennas down here in Jamaica west Indies with the little tools I have, Damm, !!
Well it's been up 3 years and boasts a 1.3 VSWR on 11 meters, has excellent rejection on the sides and rear and I've talked all over the world. Not to mention 3/4" dia, 1/8" wall thickness elements, single section ASTM aircraft tube Aluminum. This thing is a rock. I know you're jealous but you'll get over it! 😭😭
Does it work?
It rocks