How to Make an Incredible DIY Directional Antenna for Almost Nothing
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- Опубліковано 9 чер 2024
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a primer on Yagi-Uda antennas
en.wikipedia.org/wiki/Yagi%E2...
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⸺ chapters ⸺⸺⸺⸺⸺⸺⸺⸺
0:00 - billboard
0:19 - cold open
1:07 - what is a yagi-uda antenna?
3:54 - what does it take to build one yourself?
6:32 - build: long front piece of PVC
7:14 - build: short back piece of PVC
7:45 - build: handle piece of PVC
8:11 - build: director element of measuring tape
9:31 - build: reflector element of measuring tape
10:51 - build: driven element of measuring tape
11:38 - build: assembling the driven elements
13:15 - soldering the driven elements
15:02 - build: assembling the reflector and director elements
17:05 - build: securing the coax cable
17:57 - testing the antenna outside
21:11 - squarespace sponsor
22:56 - cta
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Did you guys get your ham licenses yet or plan to? 😊
When introducing the advantages of a yagi to someone for the first time, they need to know that the more gain and directionality that is realized by adding elements, the narrower the range of frequencies it is effective over. And at frequencies not too far above that which it is optimal at, it useful response falls as if off a cliff. A very high gain yagi, with impressive performance at its design frequency won't always be the ultimate solution, depending on the overall requirements of the user.
Built one of those for a comms class. Our class was required to build an antenna. My group decided to cheap out. My instructor was so amused that a group would try to cheap out in his class that he made sure we nailed a very narrow frequency. It still was cheap but we ended up fine tuning the frequency with files and sandpaper to nail the length of the elements. Our cheap out made us the focus of our instructor and he was highly amused at our fine-tuning while not allowing us to add variable inductors or capacitors to make our lives easier. He just laughed while telling us, "those components will add more cost. You wanted cheap".
Lol at least he was easy going. Tbh it was nice on his part, he made you stick to your guns and respect your original vision for the project; a great learning experience.
Those components will add experience, he arguably made your project the most valuable in the class.
Sounds like you had a great elmer!
bro teaher was an ass, if i read that right, kif jsut grab a rock or drag it on concrete to 'sandit dopwn;' and say, how is that for cheap XD
I made this but tuned to 137 MHz to download images from NOAA satellites!
Using a measuring tape to measure lengths of measuring tape. This is the kind of content that keeps me coming back.
Cut the longest reflector first, then you can use that as a ruler to measure the shorter driven elements & director... that way you only need 1 tape.
@@StreakyP Or just do math and start from wherever the end is and end where the math tells you to. ;-)
The iron wasn't lost me either. You'd think they could just use the cut measuring tape to measure the cuts... very entertaining. lol
@@mzmegazone sacrilege
This came out AWESOME!!!!
It's a shame no one gave BB the dimensions for a 75m 4 ele Yagi...🤔
Can this antenna be used on a HT like a yeasu ft4xr or do u need a better radio like the one in the video.
@@kevin31466 yeah. It’ll work on any HT really.
Would using glue instead of zip-ties for attachment change how the antennas work? You said that the bend doesn't matter much, but I can't help but guess it does to some degree when get into longer ranges.
How many of those do you see on Field Day?
The radio episode we’ve all been waiting for
Back in the 1920's, my grandfather was studying to be a radio operator. That was a challenge because there was no power grid until the TVA was founded almost 10 years later. I've got a few of his old books that tell you how to build everything from scratch. Antennas (that can double as clotheslines when you're off the air), home made lead acid batteries to power your equipment, and how to build the radios from a simple crystal set to a full fledged transmitter/receiver set.
I would love to be privy to all that info. I'm a from-scratch kind of guy.
wow
name of book would be appreciated if not why mention them. ebay is selling a book called Vintage 1920 "The Storage Battery Simplified" Book - By American Auto Digest fro $10.50 i downloaded a PDF file called The Golden Book of Chemistry Experiments for free. the hard copr is available but i went for free pdf. you just have to search
The Radio Manual For Radio Engineers, Inspectors, Students, Operators and Radio Fans by George E. Sterling 3rd printing D. Van Norstrand Company 1928 and Practical Radio Telegraphy by Arthur R. Nilson and J. L. Hornung McGraw-Hill First Edition, Second Impression 1928.
@@JH-xc4ur he posted the name
This guy was super interesting the first time around glad to see him again! Edit: Hope we'll get more! This and tea guy are insanely interesting
You should go to his channel Ham Radio Crash Course.
maybe this is because i literally just finished watching twister but i think that an episode on tornadoes and natural disasters would be really cool
What are you talking about? The shop when they are left alone? Sounds like a disaster to me. 🤣
you know, with Ham, you can also talk with astronauts on the SPAAAAACE station
@@1224chrisng The real feat is catching them at the right time. Pretty difficult to find a good overhead pass that coincides with their breaks AND they happen to be on. Then fighting with everyone else trying to talk to them..... 😰
EDIT: Forgot to mention adjusting for doppler shift!
@@jmr I'd imagine that there's software for adjust to Doppler shifts, after inputting your time and location and knowing the orbit of the station
@@1224chrisng Doppler shift isn't that complicated really. On a rig with a knob for tuning you just listen and adjust. On other radios you have to program several channels in advance then switch through them. You could use a program to do it but I haven't heard of anyone bothering. I'm sure someone wrote the software though. There are yagi antenna mounts that track satellites and the ISS.
i assume the "for almost nothing" in the title is about cost but it came across as useless to me given the rogue reputation
Okay, I just finished binging the Macgyver reboot. I feel like there are more than a couple builds in that show that you could test.
Not too many that would actually work though. I watched that show and complained the whole time.
If they want to check out "Cool things" that can be built they should roadtrip to Hacksmith.
@@lokithecat7225 I need this Collab now!
They published a book showing you how to do some of the stuff from the show. Go live your Macgyver dreams!
Protip: Don't use the PVC cutter to just brute force chomp through the pipe, close it on the pipe, then spin it/the pipe to score it deeper and deeper until it's easy to cut through.
Good protip! Spinny is strong
Huh, spinning; that's a good trick
I was going to mention this. Just a simple rocking back and forth motion makes the PVC cutter very easy to use.
The "fools with tools" portion of this video, was hands down more self-emasculating than a visit to Target.
Need to use an actual pvc pipe cutter. The one used in the video is for pex pipe
11:07 The end of a measuring tape is flimsy for a reason: when you use the tape as a hook, it compensates for its own thickness by extending the tape by about a millimetre - whereas when you push the tape against something, it collapses. It’s a deliberate design decision. However, just measuring from a later point may be easier in some cases.
Yes, glad someone pointed this out.
I can't put into words how much I love these Radio episodes. The SDR episode pushed me to get into it myself.
Much love to the crew from UK
Hello skwaab. Can you please help me. Please.
It’s avery rewarding hobby for those with curious minds and a tinkering knack. Once you’re in, there’s no going back! So many ways to explore the radio field, to hetter understand and exploit the realm of radio waves. From the earth to the moon, and back, literally! And way beyond into the universe, also!
Same
"3/8 is just one medium-size one short of half-way."
That feeling when they get super-technical but you still understand cuz you're super-smart.
This channel is so underrated... i appreciate for converting usd to BRL and looking how far the currency has gotten worse.
But anyways greetings from brazil and you guys inspire me to do these things and as a telecom engineer student i hope someday i will recreate this and others projects
You know when Josh is on the episode you're in for a good time. Love the radio content
It was the Modern Rogue that introduced me to HRCC. Now I'm a Ham General and a staunch member of the 1x crew. The circle is complete.
That’s
Awesome. Thanks for watching!!!
1X Crew!!
Welcome to the club
WX4SAR
It's good to see him again.
Thanks!!
The tape measure has some movement leeway so it will always measure accurate when pushed against something (like the inside of a box) or when pulled around something (like from the edge of a desk)
That "leeway" is actually the tape having been deliberately made with slots instead of holes around the rivets to let the end slide exactly the thickness of the end on the tape.
NOOOOOOOOOO!!!
Don't open zip tie bags at the ends, they will all fall out.
Open then with a small slit in the middle of the bag, then grab one or two zip ties (as needed) through the slit and pull them out.
They will flex and come out easily, but the rest will still be securely contained.
thanks for the protip
Don't know why I've never considered this. A "life hack" that is actually useful. :) Thanks!
Huh. Thanks
Oh, like a tissue box. That's a good idea.
just use one of the zip ties to cinch up the bag and keep them from falling out
YESSSS! I've SO been looking forward to this episode!
I just got home from work and here it is!
I LOVE you rogues!
During that intro I was like "Woah, that looks like Josh coming into the light... Oh! It IS Josh!"
Great video and excellent example of how a yagi is very directional!
Thanks!
Things I'd have done differently: 1) run the coax THROUGH the PVC, you wouldn't even need to drill a hole, use the hole already in the joiner. 2) put the zip tie OVER the solder joint to hold it in place better and prevent the solder joint form being strained if something pulls on the coax. Very cool video :)
I did mention the coax going through the pvc in the video. It’s how I do it.
@@HamRadioCrashCourse yeah, I wrote most of the comment before you got to that, that's why I added you could even route it to the side hole, don't even have to drill for it ;) :P
I’m not sure if somebody said this already, but the end of the tape measure absolutely does start at zero so if you measure from the inside it will be zero and the metal piece moves so that if you measure inside a door frame, it will also be at zero
It was mandatory for me to make 2 antennas at EE college. I made the glorious Yagi-Uda and a log-periodic. This episode was great!
Love seeing radio stuff! Very cool.
The episode I have been waiting for!
I love that you guys are getting into ham radio!
Really good ideas for DIY antennas! Like it.
You guys are great! You make learning for people fun!
As an addendum to the note at 11:10, the reason the end of measuring tapes seem to have a loose end, it's to take into account the thickness of the clip. So if you are measuring from a wall, the click slides in, butting up against the wall. And if you're measuring something with the clip hanging off the end, the clip slides forward exactly the thickness of the clip, giving you an accurate measurement.
I needed to build a Yagi for a project but didn't have all the stuff I needed such as an extra tape measure to butcher. What I did have laying around was about 2 dozen reflective snap wrist bands I was gifted. A little soldering them together, and good to go. Thanks for this upload. KC2FBH
Whoa, cool! I got my Technician license just last month, great content! 👍
WooHoo! I've been waiting for this! He didn't even turn it to make it vertical. Very cool the tape measure yagi is a fun project. Can't wait for one of their crew to get licensed
For anyone wondering what many uses this has, 1 use that I know of and have used before is dog hunting -the activity of hunting utilizing dogs to herd deer in a certain direction-.
@11:07 Tape measures also have differing scales when they're made that denote the percentage of error or error rate. If you look on the package when you buy a measure you'll find the error rate marked on the package. To make your life easier always buy tapes of the same error rate and, in general, from the same manufacturer. This will ensure that all of *your* tapes line up to each other relatively well.
BTW the Yagi-Uda antenna was invented in 1926, but since the Japanese Military didn’t want to give away information to other countries at that time by transmitting data, (yes, although under the Emperor, the military had most of the country’s power then, and was going out of control) it was initially scoffed at; they did use it during WWII though.
The US used it substantially for finding those pesky U-boats and you’ll often see them under the wings of PBYs and TBMs
@@johnbeauvais3159
Yeah, because Dr. Yagi actually patented the design in the U.K., so the allied forces had access to them. Strange that Dr. Yagi patented it under his name only while Dr. Uda came up with the design.
This is AMAZING! While the relative simplicity and effectiveness is the selling point for the Yagi-Uda, I'd love to see a parabolic design on a similar budget to compare and contrast the two.
I’m an amateur radio operator as well. It’s nice to see Josh being an awesome Elmer.
Let me know if anyone has any questions such as how to get the license, privileges from the license and where to get the license. Or ask me anything.
Hi, what questionably legal ways can I use this to harrass my neighbors?
Is this kind of antenna big enough to emit gamma particles into my neighbors house?
I can't be bothered to google. Is a license required to build one of these for the sole purpose of listening, not broadcasting? Think Emergency scenario.
@@JimmyEatDirt listen doesn't require a license just transmitting
@@kevin31466 awesome. Might need to brush off my soldering iron and make a more robust version of these guy's project using some copper I got cheap.
Just finished mine! It actually works
Thats awesome! I want to try this measure tape method too, but im going to use a cheaper stick to make it, so no pvc here. Only thing i dont really know by these videos, how far away the tape lines supposed to be from each other. I mean, they cut the pvc, but they add those joiner pieces, so that makes it longer, idk if that plus/minus 2-3 centimeters matters, but i want to make it right, can you tell me how far they are for you? :)
@@drakeblackk going from the top (the opposite end of the handle) down it’s 14 inches. Then from the two in the middle to the bottom one its just about nine inches
what a great episode!
I'm genuinely surprised and happy to find the INR conversion
Hell yeah more radio stuff
Watching you guys struggle measuring a measuring tape hurt me
10:00 this is why I advocate so vehemently for the switch to metric lol
I have several of those antennas that I built in a class I lead on how to make them. I have used them for directing finding in the 2 meter Ham band and have seen another contact the ISS using one.
I love this channel
Josh and the Rogues unite again? Yes!
It was great fun!!
I love the radio episodes!
Thanks!!
You can measure all your needed marks for the whole project and make reference marks on the table away from a fixed edge. Then you can mark your pipe and tape for cuts without needing the tape
This was great
Very cool video
The end of the tape more than likely would line up if you pulled the end tab out, it's designed to move in when pressed against something and pull out when hooked over something so that it's thickness does not effect the measurement.
your videos are a breath of fresh air from the odd word we are in currently, and plus every once and a blue moon I might even learn a thing or two Scam Tastic!!
The tool yall used to cut the pvc is intended for pex and poly tubing
Yep.... definitely have the urge to make a huge antenna now.
I made one of these. No good in the wind, but super effective
Should have had the elements vertical, polarization matters.
This.
Well, I just Made It In Like 5 Minutes, Had To Just Take Off Some Elements From My Yagi And Wholla, Learned SOmething new Fro You Guys Today, Super Cool Video !!!
Yay more radio!
Love that you had INR, made my life easier. You gained a like and sub for that 😂♥️♥️
I love to see you guys make a trench radio and find a way to build a transmitter to it to build a improvised ham radio station
I was wondering where the coaxial connects to in the Yagi antenna...now I know. Thanks.
If anyone is curious, I believe the receiver they were using is the ICom IC-705: www.icomamerica.com/en/products/amateur/dstar/705/default.aspx
It is!!
I love you guys so much. I have one burning question... for your set design why are you back lit? (I'm legitimately curious)
before digital tv was a this on the camping we had one of those on our caravan
I’ve been waiting for this since Josh live streamed in the shop lol.
That was a fun stream!
The floppy knobby end of the tape is designed (ideally) to be included. If you push the tape against something, it flops back and the width is included (on purpose). If you pull the tape, the knob flops forward and the width is no longer included. Your tip of starting at 1" is good for something like this, though, since you're not measuring on or off a surface.
And this is why it’s important not to let your tapes slam into the housing, stop them a couple inches short and let them retract gently
This is one of my favorite features on any modern tools
I love how it compensates for its own width when measuring
everything i never understood about antennas just got revealed... sweeet :)
FINALLY another HRCC collab. our prayers have been answered
It’s better to use stiff elements for a transmitting yagi. Moving antennas that flex has a fluctuating SWR which is bad.
Also, it’s good to use a NanoVNA when making antennas.
wires goes brrrrr
I had a NanoVNA with me. Always handy to have. If the antenna is still the measuring tapes work just fine. We use them for satellite contacts.
@@Sinaeb Haha, I’d imagine if we could hear an antenna, it could sound like dubstep.
@@HamRadioCrashCourse Thanks for help exposing more people to amateur radio. I saw this measuring tape yagi before and made one myself, but the SWR was all over the place, but yeah, if hold still, the SWR is fine. I just wish they had an automatic antenna tuner for 2 meters. 😕
I just learned everything I didn’t know about Yagi antenna equipment
Ya got a pex cutter to do a pvc cutters job lol but ya made it work
Hahaha. Very interesting. You guys are awesome
Отличная антенна получилась
When cutting the PVC, rotate it to get it started easier.
Yall need to do more outtakes
Josh is one of the reasons I have my general HAM license.
What frequency range is this antenna set up for? I currently don't have an antenna analyzer. Loved the video thanks
I know this is probably way down the priority list for the Rogues but your workbench is hella wobbly
HRCC!!!! I love that guy :D
Everyone gets the pipe lengths wrong. If you look at the diagram, it shows the distance between the elements as 12 1/2 and 8 inches. That is not the length of the pipes; they must be shorter than that in order to account for the space occupied by the T and cross fittings. The correct lengths are 11 1/2 and 7 inches! Also, the Instructables page has a typo putting the long tube at 17 1/2 inches, which will really screw up the tuning of the antenna.
Why does this guest look like the perfect cross between Deviant Ollam and Babak Javadi?
I need to master an extremely specific skill so that I can guest star on this channel, see you guys in a decade alright?
Hey can you put the tape sections inside the same PVC tubing? Will that work? Mitigate the rust?
New title: "Re-purposing Olympic Pole Vault poles!"
I love the "magic" workbench where the needed tools magically appear! :-)
How can you calculate how long the distanced should be at a given frequency?
I want to see them make a moon raker antenna , now that would be cool to see . I built one back in my 20s , the bigger you make them the longer you can throw & receive a Signal .
Great video on basics of building a TMY. A dumb question if I may. Presuming your FM mode and vertically polarized like your HT, wouldn't you want your Tape measure yagi oriented vertical rather than horizontal ?
Amateur radio bands use vertical, Free Through Air Television still uses horizontal. btw, the VHF/UHF TV antenna I bought for my father in 1983 is still working just fine on the mandatory replacement of the Matching transformer and coax cable with the new HD versions, I installed in 1998.. But now I use streaming, I think I'll rebuild it into a vertically polarized 2 meter antenna because I need to penetrate a wet forest to hit the club repeater 14 miles away.
What kind of wire can I use for the hair pin match? Could it be a paper clip or does it have to be a certain type and gauge of wire?
Ooohh I just noticed PHP in the thing.
Way to include Fans from the Philippines 😁
that rapid shift at the start of him laughing to black screen made me think my monitor died
Fresh out of the oven Rogue memes.
You weren’t supposed to hear about my shroom growing operation I trust you’ll keep my secret
found an old, never before used sdr dongle i bought on a shopping spree at aliexpress 5 years ago, decided to build one of these and managed to pickup a radio station over 100km away, now i'm hooked up searching what a qhf is and how to build one to pick up NOAA images, wish me luck!
Damn, this info is interesting👍.
Nice yoda antenna guys.
Thumbs up cos I know that guy from ham radio crash course 10 points for slytherin
Slags
I want to try this!:) Can someone tell me which handheld radio did he used in this video? Never seen a clear shot on it in the video :(
So this hairpin match is somthing like a lecher line?
Haven't touched a radio in like 20 years. Used to build my own antennas (with varying success ^^)