Homebrew Beam CB Radio Antenna My New Homemade Base station
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- Опубликовано: 30 сен 2024
- Co phased Ground Plane antennas. 30 feet in the air, and on a rotor. Standard 75 ohm co-phase harness, and a barrel connector used to connect it to My 50 ohm coax.
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I love how Barb supports Mower Junkie with all his projects. Behind every great man…
I love it when you make homemade antennas your real inspiration for us all
Yes he is!
Love the videos. I’m just getting back into the cb world after 47 years and it brings back so many good memories.
This is an absolute thing of beauty! Bonus points for the repurposing of the tractor seat and the "adjustment strings."
Thank You so much! 73's from 151 SC.
This antenna looks and appears to perform great. It also has the bonus of being quite compact, which would be ideal for my small garden. I know you show the parts you used, but do you have a list of what's required so a technical incompetent like me could construct one ?. All the best from across the pond.
Really enjoy your show I intend to build one myself thank you very much 73s 537
When the xyl says it's absolutely gorgeous . You have already won !
Your are the best, you certainly give us ideas on builds and so entertaining and informative in the process. Just loving the vids
Here in USA 🇺🇸 California USA 🇺🇸 ch 6 conditions are … intense and Competition Radio 📻? Not for my mud duck 🦆 radio 📻 or maybe 🤔 555 Bahamas CB poker ♥️ and chips fall where they may
Nice job.
Been playing with 102" whips in various configurations.
Ground plane is the key to success.
I agree! Thanks for watching, 73's from 151 SC.
Phased Array works well. Reminds me of the "Twin Trucker" antenna on each rear view mirrors.
Back between 1982-1988 was on the upper channels dx'ing. Had a modified President Madison and 400 watt amp. Collected up some black iron pipe and home brewed a tilt-over tower that stood 84 feet. Started out with a Wilson Y-quad and then built a full 2-ele-quad. Later put up a 5/8th (mighty magnum) wave vertical. Had a ball talking all over the world. The 11 meter band was wide open back then. Retired now. Enjoy watching your channel. :)
Like John said this antenna should be directional in the direction the ground radials are pointing. Theoretically it should have less forward gain than the 3 element beam also the purpose of the beam is to give you forward gain eliminating or should I say reducing signals coming from the back and sides of the beam. This antenna has some gain in the direction the radials are pointing and allows you to hear signals coming from all directions it's like having a omnidirectional and directional antenna all in one. If you are building this for cb channels separation between antennas should be a quarter wave apart around 9 feet the coax for the cophased rg59 around 18 to 20 feet on each side 75ohm to achieve a 50 ohm at the radio. 73's...
I don't want to complicate things but Iam sure some are wondering or thinking about this lol. Rg59 is rather small coax there is also rg6 and rg11 coax more expensive less loss probably handle a little more power but the lenght for each side will be shorter both are 75ohm and not that hard to get it's used for cable systems and stuff like that. For low power or reasonable power stations rg59 is a no brainer already made and plug and play like they say. 73's..
I hope that you keep both the three element yagi and the co-phased ground plane up on the roof. This way you can work both verticaly and horozontaly .
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Hey did you use a cophase harness if soo what length? Also what coax type going back to radio? 73's from the Mile High City 4-2-0 Wavin
This has been around since the 60s yet i think many have forgotten great job
Thanks Andrew, So far I am very happy with this antenna. Thanks for watching, 73's from 151 SC.
Is that 9’ 4 “ perfect spacing or would 9’8” work? Also, would a 18’ co-phase harness work? Cool build and 73’s.
The spacing is not critical on this design. it will work best with 9 to 10 foot spacing. I used a factory made 18' co-phase for mine, and a barrel connector to attach it to my coax. Thanks for watching, 73's from 151 SC.
You need to check out the hhsh like in hotel hotel double Bay I saw this antenna and CQ mag back in the 90s and it was for 6 hours and I extrapolated it into 11 love meter in a thing hanging from a pine tree I am here in Montana in my yard it's on a Hellyer. So you can spin it around directional directional fire through the h
What do you think about non metallic verses metallic guy wires
You've got yourself a nice little dual diversity pair of stardusters I like it kind of reminds me of the old set of IMAX antennas I put up going opposite directions about 30° up from flat had to use a pair of 75 ohm cables quarter wave long times the velocity Factor get it to work right and a couple other little deals but yeah Homebrew that's the way to go man when it works you feel 10 times better than just going out and buying something
Great video.... ONE important tip - For a "more durable" tie wrap for exterior/sun exposure, use a BLACK tie wrap. The white/clear wraps WILL deteriorate much faster than the black nylon wraps. The black nylon blocks the sun's UV rays from destroying the nylon.... The next time you are on the roof, place some black tie wraps next to the white ones and you will see the difference in the durability....
Brilliant. Simply brilliant. You inspire me (and others, obviously). I wish I were as young as you are. No more climbing on the roof for this old geezer. BTW, I heard you this morning on ch. 35 LSB talking with someone in Chicago, I think, but conditions weren't good for me to you. Maybe one of these days I can be honored to have a QSO with you, 151. And I really liked Barb's comments. Happy 4/20. 73 from Unit 807 -- the Old Buzzard in southern Illinois.
I hear You, It won't be many more years till I can't go up on the roof anymore too. It's kind of funny to see Me come down off the roof....I crawl on My hands and knees. Yup, I was on 35 lsb for a little while today, I wish We could have made a contact, When We do.....the honor will be Mine! Take care 807, and Happy 4/20 to You too! 73's from 151 SC.
What is the distance from the end of the pipe to where the radials hole is drilled? I enjoy the information that you provide.
Congratulações excelente antena bons Dxs pw8gts
Decent build matey !
I built a 2 ele cubical quad for portable, I could assemble and take it down in about 5 mins, for 10m/11m it was bloody awesome.
The boom was square thin wall aluminium, and the spreaders were old army tent poles I picked up at a surpless store.
With a 1/4 wave length of 75ohm coax as a matching stub I got a 1.3 to 1 SWR at the lowest point, and it was under 2 from the bottom of 11 to the top of 10.
I know I've asked 100 questions here but on your coax going to each antenna I think you said you use 75 ohm what was your total length?
a basic co-phase harness like the truckers use works great. it's made out of 2 9 foot pieces of 75 ohm coax.
Works fantastic. Your signal is much better locally. Pretty neat looking too.
Great work MJ! You are a great advocate for our hobby. Really appreciate your passion
Thanks, I appreciate that! Take care, 73's from 151 SC.
Looks fantastic! How did you arrive at the design? I'm interested in the calculations. I need a roof-mounted DX antenna (read 'small') that can reach Japan from east coast USA on 100 watts. Can yours do that? Also, what bands can it cover? Thanks!
Cool. I've always wanted to do that with two A99s.
I added a 6.5" x 1" hairpin from the base of the top 1/4 wave to the grounded hub beneath it as a DC shunt to bleed off static to ground.
that's awesome, I'm glad to hear that worked.
I'd ask you to take a ride to Sumter and Cheraw to check out some houses for me, but you're always too busy building something. lol
send Me an email. I might be able to help you. mowerjunkie@yahoo.com
I like your Realistic SSB. Nice,nice...
Hello there.. instead of using the 48" fiberglass radials would it be possible to use the 102" whips as the ground radials?
Yes, 102's would work. any 1/4 wave antenna would work as the ground plane.
@@MowerJunkie hey mower junkie thank you so much... 73's is my friend!
That is a wonderful idea. Best of both for local and DX. 👍🏻👍🏻👍🏻👍🏻
This is impressive! I think I may just try to make one of these someday.
👍
Very similar to a 2 element I built but it had one 1/4 wave radial in the vertical, one 1/4 wave in the horizontal and the driven 1/4 wave at a 45° downward and it had great vert & horiz DX performance, almost no selective fading! It used three parallel 3.5% longer reflector ¼ waves at 87" spacing.
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It is very interesting! Thanks for sharing!
Thank MJ for making these videos. I really like watching them as it seems you are making them next to your viewers.
Thank You so much! Take care, 73's from 151 SC.
JoGunn makes a very similar Model ( The StarBeam) , he has some weird design's mainly based of 2 connections
Cool groundplane. Gonna build one tomorrow. How far exactly apart are your two verticals?
Thanks. the spacing is not critical, just don't go over 9 feet, or shorter than 6 feet. 9 feet will give you the most gain, but 6 would work too.
@@MowerJunkie thanks. I've built a lot of antennas. But the math seems to get in the way. Especially with dipoles. But this groundplane of yours really cool. Beautiful in its simplicity
Greatful Antenna DX goas Worldwide. 10/4from sourh Germany near lake Constanz. 13hn98 or einsamer Wolf how named is this Antenna ?
WOW ,Great job with that one!!!!! How many inches from 102 to 102???
I believe he said 9'4" between
1/4 wavelength of the frequency in question
Awesome job as always. It was worth the wait. Very educational.
Antenna design ask my neighbors 502 Fresno California USA 🇺🇸 or 188 Sno Beast… wHo know how and CB AM cB radio 📻
Fantastic job
Put a 15v 330µƒd capacitor across your S-meter and it will slow down both the meter movement and your AGC on SSB so it won't be so spastic and "pumping" sounding. Make sure you get the polarity correct, + goes to the meter wire that's not negative/ground. I bet you'll love it on SSB! You can put the Capacitor on a switch if you want it to be back to fast for AM.
Just got thru with a long QSO with 1963 Jamaica On .525 LSB on 1/30/23 at 5:00 central We talked about you and both being subs. He said he hadn't talked with his good friend Mower Junkie in a while, due to cond on .385. He said he is on .515, mostly, and .50, .515, .525, and ( ? .60 ) All lsb. 73/88 from Mike DX21
Bravo perfeito exemplo total bazuka Foz do Iguaçu pr Brasil
Where do you get the materials to build your antennas ?
Thank You. I have bought parts at metal suppliers, Yard sales, flea markets, or any place that has something I might be able to use.
Thanks for watching, Take care.
Good job. It’s great with the rotor. You can null out interference and at the same time get some gain vertically polarized . Great video as always MJ. Art NJ
Thanks for watching, 73's from 151 SC.
Hey MOWER !!! good video Mr. 429 Randy is few block away from my QTH .. 429 booms all over the place, break break !
AM radio 📻 CB and One ☝️ Element recycle ♻️ and chimney top radio station 🚉 17 feet 🦶 up… the Three element recycle ♻️ beam is 15 feet 🦶 off the ground CB golf ⛳️ and CB baseball ⚾️
The best I've seen yet. Those mobile antennas really work well when paired up. 155 N.C.Ohio
Thank You so much! Take care 155, 73's from 151 SC.
Number one ☝️ rule of Radio 📻 is Safety First ! Please do be Careful and Look 👀 electric ⚡️ power and ohhhhhh noooo
Awesome comparison vid! Now really curious on the radiation pattern of the co-phase. Maybe wider coverage than the Yagi?
Will 10 aug. Copper wire be a acceptable replacement for the radials you used ? At 108" . Thanks...
That looks like a, Gizmotchy 2 element beam
What a buetiful masterpiece 👏
Does this have 4 lobes? Co phase projects perpendicular to the elements but if it works a bit like a yagi it would project front to back, I'm guessing it has 4 lobes and does a bit of both, i guess you can test that with the rotator.
How about add 4 more 102" instead of those loaded sticks. I have a metal roof and thinking to try this in one direction, north if with directors along the roof apex, or east to west as co phase. If it works well with the roof as the ground plane i might be able to swivel a few 102" whips over the apex for directivity. Could be worse i guess.
Another idea i had was to mount co phase on each of the 4 sides of my roof.
great video lovely antanna its a pity over here in Ireland nobody uses am anymore.we do have a choice to use fm but only rarely used only when propgaion is in. Most use the upper band on ssb 27.555 calling channel
why dont you build your self a 2 element delta loop beam antenna for the driven element is 1005 div by the frq the reflector mite be 10 percent bigger you can look it up on the net
Excellent! Wish you had rotated it 180° during QSO with 1963 Jamaica, so we could hear the received signal drop to below the noise as the side null is pointed at him, and then hear the peak build when it rotates to where it is again broadside to the other station. If you S-meter is linear, you can calculate the front & back to side ratio in db that way. Nicely done!
You're right, I should have rotated it. I have rotated it while talking to locals, one of them gives me a 6db signal pointed at him, and a 3db on the sides. Thanks for watching, 73's from 151 SC.
You would not rotate it 180 degrees it transmits front and back theres no back rejection to this antenna
Very Very nice. Félicitations. GOOD JOB. 73. 😀
Usually when using the 102” you can usually get a better/ lower S.W.R. If you use a 6” spring on each 102” so it makes your overall length 108” each
The match on this antenna is almost flat, even with extra power. Springs would only add more weight to the antenna. Thanks for watching, 73's from 151 SC.
I want to try to make a beam, I picked up the QT-40 and ordered a little fancy box I want a simple 3 or 4 element beam how wide does it have to be?
I'm going to try to build this antenna so I to can shoot skip hope to hear you out there in DX land Repo-Man#619 in the buckeye state Cleveland Ohio brother the mistake by the lake
Looks exactly like a Jo-Gunn...Inverted
Works great looks great keep up the good work.I really like your videos and they all work great. I’m NightOwl 137 Southern Indiana
Thank You so much. Take care 137, 73's from 151 SC.
How are you watched one of your videos but you had to test on a.m. and upper side band test you didn’t get very far the sounds were different with this Santana the one in the garage will it sound better and louder and easy to pick up better you need to do another test on I think it was 7 miles or 11 miles or 12 miles that you did on the test I don’t me I forgot now but I’d like to see that again with that antenna shepfc1 back quiet
What an amazing antenna, like the comment from Robert M. below, that is an *amazing* antenna, getting the resonance correct first time is simply amazing. You are a fantastic engineer, and I agree with your XYL ! This is lovely to watch.
Thank You so much. Take care, 73's from 151 SC.
I just completed this antenna build, I used two ss 102 whips and 4, 4ft Wilson fiberglass antennas for ground radials. It's turned out awesome, it looks like something I would have bought from a store. That's just my opinion. My swr's aren't quite as good as yours, but I've got 1.3 to 1 on channel 1, 1.2 to 1 on channel 20 and 1.1 to 1 on 40.
I usually talk on 38 lsb so I'm happy with my swr readings. Love you're channel, keep bringing on the antenna builds, love em !
That's awesome! You're the first person to tell me they successfully made one of these antennas. Enjoy the hobby, 73's from 151 SC.
Why not using SS whips for radials?
@Luis Perez who can afford to? They're close to $100 apiece anymore. Not worth it for a home brew antenna. You'd have $300 to $400 wrapped up in radiators and radials if you used 102's for the entire build.
Compromised radials are the norm anyhow. The Sirio GPE 27 5/8 ground plane has three radials that aren't but maybe 4 or 4 feet and the Tornado 27 has slightly shortened radials. Both perform plenty fine
@@LuisPerez-xe6nu
I thought about it, but it came down to money. I still want to use all ss whips to see if it will preform any better, but as it is right now I'm very happy with the antenna.
If you can get the velocity factor of the coax make an endfire array by having 1/4 wave more length on one feed that will make it unidirectional.
I just got my ham license in Canada. It’s going to be a while before I go HF but in the meantime I want to do CB radio.
Im not to knowledgable of the co-phased antennas. Question, both the 102 whips are not active at the same time are they? In meaning, you have both the coax going into a switch box. What would happen if you had a splitter connector to connect both coax and was able to run only one cable to the switch box
this antenna does not use a switch box, both antennas are active, they are coupled together with 75ohm coax.
Hey Mower Junkie, can I ask where you are located? I live in SC.
The shape reminds me of a gizmachi. I wonder how it would preform with two more elements.
Me too! a Gizmotchy was the first thing I thought of, after I put it together. Thanks for watching, 73's from 151 SC.
You should feed them 90 deg out of phase or if not spread them apart 18 feet you'll get a much better performance.
Is there any way you could send me the specs on the dual co-phased antenna? I just bought a Galaxy Saturn and that antenna might be a good match.
The best antennas I have ever used in my life were home made ,, Thanks for sharing the great information.
Hi how do I build one thanks from 416 Trinidad 73s
Maybe you will update and add a flat side and add a switch might be a good thing for you to try almost looks like a PDL 2 and on a tower for 2 wave lengths 64 feet to the ground plane and a good ground I'm slimjim 119 in the cold country eastern Ontario Canada I'm working on my radio just need a meter signal for a Cobra 25 it quit a lights then back in my car Wilson 5000 and a 225 Palmar
Thanks for watching, 73's from 151 SC.
Are you making these antennas using electric conduit pipe. And ham sticks?
what is the distance in inches between your 2 whips
96" spacing between the whips.
@@MowerJunkie I've read in the ARRL handbook a .2 spacing (87") is supposed to be the point of highest gain & best Front to Back.
Very impressive antenna, what do you think of a co phased vertical dipole using 102 inch whips?
I have done this and it worked quite well. Sorta like a rotatable dipole.
I like it! and I want to try it! Thanks for watching 73's from 151 SC.
been watching off and on for years ..i am probably going to try to build something soon ..im broke so building my own is a no brainer
Vey nice antenna, good job. 73
Co phased Ground Plane antenna, ON ROTOR!!! IT'S A BEAM!!! @3:15 YOU SHOW 2 COIL MOBILE ANTENNAS ON THE BEAM YET U NO USE!!! DIDN'T CHANGE YR METER SETTING FROM 20W TO 200 WHEN U SWITCH ON FOOTWARMER!!! @19:09 THIS GROUND PLANE IS TURNING THUS IT'S A BEAM!!!
the 102's are a lot better than the coil whips I have. My meter was set to SWR, When set to SWR it doesn't matter where the watt setting is at. Thanks for watching, 73's from 151 SC.
that's a copy of a GIZMOTCHY®
Can you give me an inventory parts list of your antenna build
That's fantastic! Great work. 73s from 993 Seattle
Thanks 993, 73's from 151 SC.
Where did you locate that Realistic radio at? Great antenna by the way. If iam not mistaken, you pop into Wagon master 390 channel (live stream) from time to time.
I just picked up a RCI 2970n3 that iam working on getting set up here at the homestead, maybe we can get a DX QSO going.
Great channel, thanks for sharing your antenna build. 73's to you!!!✌
I have 2 of those TRC-451 realistic's, I found one on ebay, and a friend gave me the other.
390 WagonMaster has a cool channel that I do enjoy watching.
Take care Eric, Good luck with that 2970. 73's from 151 SC.
Hey Mower Junkie - I just come along your channel and I need to say “WoW”. Back in 1973 - my wife and I had the Realistic TRC-46. I still own it. In the house we used a Yaesu 101 for CB with a Moonraker 4 on the roof. After watching your video - I’m believing you and your wife take a lot more pride in your set-up than I did with mine. It’s always a lot more rewarding when you put your own system together and get the results that you just achieved. To make your own “Beastly Antenna” and get a 1 to 1 SWR - - That’s almost impossible. “Way to go”...
Thank You so much! I spent a lot of time designing this antenna, and I couldn't be happier. it looks great, and works great too! Thanks for watching, 73's from 151 SC.
Great Job on this Antenna
why not have the nuts spot welded on buy on line the tv antenna rotor to turn the antenna n to s
Hey. Question. ..
Swr. A justing. Trim 102. On top 4 better. Swr...
When this antenna is assembled correctly, it will not need any adjustments. it will have a 1.2 or less SWR.
Thanks for watching, 73's from 151 SC.
I’m Estevez can I get the diagrama for connection on the antenna .
I’m KF6SVC
Thanks I’ll appreciate the info.
sorry I don't have any diagrams for this antenna, I only have this video.
Are the fiberglass antennas hooked up to coax?
you might want to add a more beefer stud mount on the 102's. With much wind it will bust the stud or wholler out the insulator, just a idea
Thats what I have in my truck bed. Though I have the slim heavy duty spring that doesnt flex much. 10 years on my daily driver. No issues but regularly serviced and cleaned.
Question: You put that antenna up with the 102s. The predator style antennas you had on it when it was in your garage,how do you think they would have worked? I'm asking because I have 2 of them all ready.
A 102" steel whip works the best, but any 1/4 wave antenna will work.
The tye-wraps are not UV rated and will not last. Go with T&B BLACK cable tye's available on E-bay.
This antenna will most likely be coming down in a few months, to make room for the next project. I really enjoy building antennas, so they usually don't stay up for long. The zip ties I use will last longer than the antenna will be up. Thanks for watching, 73's from 151 SC.
How do the two cables terminate at the radio end? Thanks for posting.
The cophased harness are already made you can order them on ebay 18 feet per side it's connected to a single connector you need a double female 259 to connect the two 75ohm coax to your normal 50ohm coax to the radio. I hope it's clear enough if not I don't mind answering any other questions you might have 73's..
You are spot on! I set it up just like You said. Thanks for watching 73's from 151 SC.
Just curious to what is the front and back of the antenna? I'm thinking of building one but just pointing it north
this antenna sends the signal in 2 directions, perpendicular to the boom.