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Ham Radio Antenna - A Cheap and Cheerful Multi-Band Delta Loop 

SevenFortyOne Radios and Repairs
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I've started experimenting with a Delta Loop Ham Radio Antenna. Here is my first attempt at making one with supplies I had lying around.
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This video is for entertainment purposes only. I'm not an expert...
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#hamradio #antenna #amateurRadio

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Опубликовано:

 

7 сен 2023

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Комментарии : 60   
@IZ0MTW
@IZ0MTW 9 месяцев назад
Hi and thanks for sharing the whole experience. Aside from the content of this video I wanted to give you an advise on the antenna analyzer. It looks like it’s got some issues. How can it read an impedance of 138 ohm resistive and give you a value of swr 1.1? You should test it at least against few resistive loads (like 50,100 and 150 for example). Given the 50 ohm output impedance of it you should read swr 2 with a R 100 ohm X 0 ohm. I strongly suggest you to check it. 73 Diego
@SevenFortyOne
@SevenFortyOne 9 месяцев назад
You have a good point. However, SWR calculation is somewhat complex and I'm not sure its proportional to impedance. But I'll check my meter anyway just to make sure.
@SevenFortyOne
@SevenFortyOne 9 месяцев назад
I just took a closer look at my meter and I think you are right - it doesn't seem to be working correctly. With a pure resistive load connected directly to the coax terminal it is reading a high resistance compared to a standard multi meter. With nothing connected the SWR is measuring 2:1 instead of infinite. Looks like I need to see if I can calibrate and/or repair it Thanks for pointing this out!
@Jiminico
@Jiminico 2 месяца назад
I noticed something not right with the meter immediately. Good video nonetheless! Thanks Rob.
@jamesabc372
@jamesabc372 20 дней назад
​@@SevenFortyOneIf you can invest in a rigexpert antenna analyzer. 😊
@KC5TGTRadiosNMore
@KC5TGTRadiosNMore 9 месяцев назад
Been wanting to build one of these for a long time. You did a great job and gave me some good ideas for mine. Thank you for taking the time to put this together I enjoyed watching it! 73
@johnsalisbury7664
@johnsalisbury7664 7 месяцев назад
Great video, that is the first time I watched someone go through the process. I have a 40m loop sitting here I have been waiting to raise. Thank you for the excellent ideas.
@1crazynordlander
@1crazynordlander 9 месяцев назад
Thumbs up Rob! Thanks for sharing. Very simple setup! I will have to try this. Kevin
@MikeN2MAK
@MikeN2MAK 9 месяцев назад
Great video! I haven’t tried a delta loop yet and this will be super helpful. Thanks!
@HamRadioDX
@HamRadioDX 9 месяцев назад
Great comprehensive video Rob! Good stuff.
@roberthuet4549
@roberthuet4549 4 месяца назад
Thank for this model of delta loop antenna , I certainly try it with my transceivers.
@KK6USYHamRadioAdventures
@KK6USYHamRadioAdventures 9 месяцев назад
Great job on the antenna Rod, thanks for sharing
@n4leqonthego852
@n4leqonthego852 9 месяцев назад
Great video Rob, thanks for the information.
@walteredwards544
@walteredwards544 9 месяцев назад
Thank you for this. I've always thought about trying this. Your demonstration made it a lot easier to understand. Now I just have to start collecting components. Thanks again and 73 👍🏾🙏🏾✔️💯
@SevenFortyOne
@SevenFortyOne 9 месяцев назад
I just used material I had on hand. The antenna was easy to build but because of it's size a little hard to set up
@rs4425
@rs4425 4 месяца назад
Great ideas with this video.. thanks..
@temporarilyoffline
@temporarilyoffline 9 месяцев назад
Good job Rob!
@jgstevens5169
@jgstevens5169 8 месяцев назад
Thanks for your video. I too have considered a Delta antenna, strickly for 11 meter. Will start with the formula you used in the early part of the video, wanna be sure i have enough wire to pull it off... 😅... Clever use of your random PVC laying around.
@thormusique
@thormusique 7 месяцев назад
Excellent video, thank you! I love your idea of using the PVC couplers this way. I'm hoping to erect a giant horizontal loop at my place (in VT) in the coming months, so I think I'll borrow your idea. Cheers and 73!
@SummitBidTech
@SummitBidTech 2 месяца назад
Interesting. I have some tall trees in my yard and have been using them for mono band dipoles and a 40 meter EFHW but I think they are spaced well for a multi band horizontal delta loop. I like the use of PVC for the support points and I have plenty of that lying around. Tnx
@TheAppalachianWay
@TheAppalachianWay Месяц назад
Not knocking your combination wrench to lob the fishing line. But I tried a slingshot with little success. So I brought out a catfish rod/ reel with 2.5 oz of lead. Got my center point up 70’-80’. Like the build, 73’s
@iu1olr
@iu1olr 5 месяцев назад
Great antenna! i try it!
@snail2171
@snail2171 6 месяцев назад
I had Delta loop horizontally hanging antenna. 27 meters each side of triangle. It was connected without transformer to Pi tuner on my tube power amp. Was working many DX on 80m, 40, 15, 10. 20 meters band wasn't allowed for my license category.
@jeffdyer2393
@jeffdyer2393 9 месяцев назад
I use this cut for 30 meter's feed with 300 ohm twin lead no balun because there is a 4:1 in my tuner. Work's great 20-40 is usable 10-80. Great dx 20-40
@arthurgumbus3969
@arthurgumbus3969 8 месяцев назад
Hi Rob, Nice Video, I would not "fix" the two non-fed triangle insulators to the wire as you have them in the video. Instead I would allow them to "slide" or "move" as wind, ice and movement need to be accommodated for in the antenna erection. A flexible antenna and its mount points are important IMHO. I run a 80-10M Skyloop Horizontal Square Loop which is up at about 50 feet. For insulators I use old glass insulators. I am using the Balun Designs 4:1 5KW 4115et balun in a corner and feeding the antenna with LMR400. The Loops are Great antennas with many lobes and nulls as you use the antenna further up in fundamental frequencies. Very quiet antenna. If you go to my QRZ page I have a link to most of the videos, articles and tools for both square and delta loops. Thanks and Good DX with you loop. Art W1SWL in CT.
@sameer1798
@sameer1798 6 месяцев назад
Good. I have a 22 m delta loop antenna and it works at 40.20.15.10.6 m , with only AH-4 tuner. QSO is quiet without the noise and nvis HZ1DK 37
@Philip-KA4KOE
@Philip-KA4KOE 3 месяца назад
I like how you hung the balun..
@Philip-KA4KOE
@Philip-KA4KOE 5 месяцев назад
As an engineer, your drawing is just fine.
@davidbridge3542
@davidbridge3542 2 месяца назад
Found the high quality technical drawing difficult to follow...my 8 year old daughter explained it to me 😅😅 Thanks for uploading.
@a_ham_like_me
@a_ham_like_me 9 месяцев назад
Nice job on the delta loop! I like the use of the PVC connectors as strain relief. Also congrats on some DX during the contest. Did you notice any reduction in the noise floor at your location using the loop?
@SevenFortyOne
@SevenFortyOne 9 месяцев назад
I didn't compare it to my dipole directly but it seems about the same to me...
@a_ham_like_me
@a_ham_like_me 9 месяцев назад
@@SevenFortyOne Great, thanks for the reply.
@n0vty873
@n0vty873 6 месяцев назад
You design, build, tune antennas, some work, some don't, you are an expert. It is all based on theory.
@SevenFortyOne
@SevenFortyOne 6 месяцев назад
I am not an expert...just a tinkerer
@Frank_K4FMH
@Frank_K4FMH 8 месяцев назад
Nice video! I'm tinkering with a Delta Loop for portable ops myself. The current flow in loops is fundamentally different from dipoles(cosine dist vs sine). Was it quieter from your impression, as loops tend to be? 73 de K4FMH
@SevenFortyOne
@SevenFortyOne 8 месяцев назад
I didn't notice as the band was pretty quiet that day. I haven't gotten back to it since the video but I want to do some more experimenting with this.
@ChaplainDaveSparks
@ChaplainDaveSparks 26 дней назад
¼λ stub? Sounds like a job for a _Smith chart_ ... if I only remembered how to use those from my college days ... 😊 73 de AF6AS
@SevenFortyOne
@SevenFortyOne 26 дней назад
1/4 stub would match on one band only...it's been a while since I used a Smith chart myself.
@J123G
@J123G 7 месяцев назад
With your impedance hovering ~60-120 wouldn't it have been a better match to use a 2:1 transformer? Your 4:1 obviously worked but for someone considering the same build I'm just trying to understand the optimum match.
@SevenFortyOne
@SevenFortyOne 7 месяцев назад
My meter wasn't working right in this video. Having said that, I think ideally a 2:1 would be the balun to use but they aren't as easy to come by as a 4:1. I like the phrase "perfect is the enemy of good". I tend to experiment with things I have on hand to try stuff out and iterate/refine from there to improve performance.
@louisbloem5960
@louisbloem5960 7 месяцев назад
thanks for your video ..Question if you can help ..does the direction of the Del;ta loop triangle matter .for my 10 and 11 meter .i am in Cape Town South Africa like to build one for DX skips lol Regards 44LB11
@SevenFortyOne
@SevenFortyOne 7 месяцев назад
I think there is some directivity based on how you feed it. I suggest doing a Google search for "delta loop" and you should find some information about this
@louisbloem5960
@louisbloem5960 7 месяцев назад
Thank you ..I will go and have a look ..thanks Regards South Africa Cape town @@SevenFortyOne
@davidbarr832
@davidbarr832 9 месяцев назад
Hello KJ4ZIW great vid
@SevenFortyOne
@SevenFortyOne 9 месяцев назад
thanks - I'm glad you liked it!
@tpcdude
@tpcdude 9 месяцев назад
deta loops Rule!
@gotman4409
@gotman4409 Месяц назад
I didn't catch how far off the ground the bottom portion was. It looks to be about 2-5 feet or so. Thanks
@SevenFortyOne
@SevenFortyOne Месяц назад
Yes- just a couple of feet at best. It was a temporary installation
@K7EXO
@K7EXO 9 месяцев назад
Good idea and awesome video. 73 de K7EXO
@NHSbandUnofficial
@NHSbandUnofficial 9 месяцев назад
I'm so confused! Maine, West Virginia, New Mexico. LOL
@SevenFortyOne
@SevenFortyOne 9 месяцев назад
I get around 😎
@northwoodsyankee3528
@northwoodsyankee3528 9 месяцев назад
You saw that too?
@northwoodsyankee3528
@northwoodsyankee3528 9 месяцев назад
Pretty cool how an antenna so cheap, simple and close to the ground can do that isn't it?
@SevenFortyOne
@SevenFortyOne 9 месяцев назад
It worked surprisingly well
@northwoodsyankee3528
@northwoodsyankee3528 9 месяцев назад
@@SevenFortyOne For sure.
@ededison9404
@ededison9404 8 месяцев назад
Like IZ0MTW said, your meter is not working correctly. what you want to do is use ladder/window line straight to a tuner. That's how I feed my 560 ft loop and my portable 20m loop/40m doublet. KI4YTV
@ededison9404
@ededison9404 8 месяцев назад
My portable antenna, can be changed from loop to doublet very easily by a wire nut in the center of the loop bottom. the 40m 1/2 WL doublet is about the same length as a full WL 20m loop. As anyone who uses balanced feed line and a tuner knows swr is a coax problem. A 20:1 has the same loss as 1:1 on rg8 on 100 ft runs. yes, I meant twenty to one
@TheArtofEngineering
@TheArtofEngineering 9 месяцев назад
I threw my wrench …. It went through my neighbour’s window and killed her 🐈‍⬛…. Then I threw it again and …😂😂😂. I love antenna play! ❤ 73 de VK2AOE
@SevenFortyOne
@SevenFortyOne 9 месяцев назад
You have to be more careful 😁
@uhfybngnn1007
@uhfybngnn1007 8 месяцев назад
Выкинь нахрен свой антенный анализатор! 100 Om и КСВ 1,1 ))))
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