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Practical Antennas
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Добавлен 4 июл 2021
Practical antennas for amateur (ham) radio, including antennas for portable operation, emergency communications, Field Day, and radio-direction-finding (ARDF), from my website at PracticalAntennas.com
SEAPAC 2024 | Practical Supports for Portable Antennas | Dale Hunt WB6BYU
Wow, has it been a year to remember! After a long wait, and a new computer that can process 50 minutes of footage, the SEAPAC talk is here...
We had a bunch of technical difficulties. There was supposed to be a powerpoint, and the audio isnʻt the best. I hope you still enjoy the video!
We had a bunch of technical difficulties. There was supposed to be a powerpoint, and the audio isnʻt the best. I hope you still enjoy the video!
Просмотров: 71
Видео
3 Simple Wire Antennas
Просмотров 18 тыс.3 месяца назад
Welcome to Practical Antenna's longest video yet! In this video, I will show you three simple wire antennas for use in the field. All of them are extremely portable and relatively inexpensive to set up. These are great for field day, backpacking, and everyday use. Enjoy! Leave us a comment with video ideas or any questions :) For more info, go to practicalantennas.com Dale WB6BYU Video Credits:...
Vertically Polarized Delta Loop
Просмотров 9575 месяцев назад
In this video, I explain and show you how to build a Vertically Polarized Delta Loop. I set up a model in my backyard, and then traveled to a place that works very well with this type of antenna. As always, you can find more information on this antenna, and others on my website, practicalantennas.com. Here is the think I referenced in the intro, and a link to the theory behind this antenna- pra...
Setting Up A Dipole #4
Просмотров 4452 года назад
This fourth video shows using a telescoping fiberglass mast to support a lightweight dipole antenna.
Setting Up A Dipole #1
Просмотров 3982 года назад
This video shows how I set up a simple 20m dipole antenna, using a throwing bucket to hang it from a tree.
Setting Up A Dipole #2
Просмотров 2002 года назад
This second video shows setting up a dual-band dipole for 20m and 40m, hanging from a tree branch.
Setting up a dipole #3
Просмотров 3082 года назад
This third video shows how to hang a dipole or loop antenna between two trees
Setting up a Sectional Mast
Просмотров 2,1 тыс.3 года назад
This shows how a single person can set up a sectional mast to support ham radio antennas. This can be used for portable antennas, Field Day, Emergency Communications, SOTA, and other temporary operations.
Winding Rope
Просмотров 1,1 тыс.3 года назад
A simple method of winding a rope to help reduce tangles. This can be used for ham radio antennas, portable antennas, Field Day, Emergency Communications, SOTA, and other types of portable operation.
Throwing Bucket #3
Просмотров 5503 года назад
This is a continuation of the series of how to use a throwing bucket to hang a ham radio antenna from a tree. Here we try some taller trees. This technique is useful for portable antennas, Field Day, Emergency Communications, SOTA, and other temporary antennas.
Throwing Bucket #2
Просмотров 7113 года назад
A longer video showing how to use a throwing bucket to hang a ham radio antenna from a tree. This is useful for portable antennas, Field Day, Emergency Communications, SOTA, POTA, and other temporary antenna installations.
what bands do these antennas provide?
In this cases, the dipole/inverted vee and the ground plane were for 20m, and the delta loop was for 10m, but they can be built for other bands. Nominal dimensions for various shaped loops for most bands are here: practicalantennas.com/designs/loops/loop-sizes/ Nominal dipole dimensions are here: practicalantennas.com/designs/dipole/dipoletables/
Thanks for reply. Generally single band
I often connect dipoles for 2 or more bands to the center insulator at the same time, then tie them off in different directions. That gives me multiple bands without needing a tuner or changing the antenna. I often have used such a combination for 80/40/20/15/10m. practicalantennas.com/designs/dipole/dipole-kit/ The ground plane approach uses the same sets of wires, although it may be a bit more difficult to use vertical wires for multiple bands at the same time. The loop tends to be a monoband antenna, although it may be useful over a 2 : 1 frequency range (about 2/3 to 3/2 wavelength) with ladder line and a wide-range tuner. A horizontal loop makes a better multiband antenna than one in a vertical plane.
I'm confused. Don't you need a balun for the dipole antenna (the first one in the video) ?
Do you NEED a balun? No Is a balun a good idea? Yes. A balun makes antenna behavior more predictable. I certainly recommend them, especially if you are in an environment with lots of electronic noise makers, as they can help reduce the noise level on the antenna. But sometimes, such as for portable operation (and especially backpacking), I make a conscious decision to leave them off to save weight, or for simplicity. That doesn't mean that the antenna doesn't work, but that one might sometimes encounter quirks, like stray resonances due to to the coax length rather than the wire lengths, or RF in the shack that makes my keyer continue sending after I let go of the paddles, or plugging in my headphones changes the SWR. And often, you may not notice any side effects. So, yes, a balun is a good idea, but don't let the lack of one stop you from putting up an antenna and getting on the air. I do have a dipole kit with a built-in balun (shown in my article here: practicalantennas.com/designs/dipole/dipole-kit/) I'm still experimenting with good designs for them.
Thank you for your effort. I have spent many hours reading about loop antennas on your website. I currently use a 80m vertical oriented, vertically polarized delta loop. Next will be a horizontal 160m, 1 possibly 2 wavelengths. Thank you and 73’s
That's an interesting combination! Look forward to seeing your 160m loop results!
What mast is that?
The mast is from Max-Gain Systems www.mgs4u.com
What mast are you using? I would like info on the mast and the speed clinch. Excellent video.
The mast is from Max-Gain Systems www.mgs4u.com. The Speed Cinch is available on Amazon - just ignore all the straps for horse saddles.
TTY butterfly knot to store wire. Like it 😎
Someone else remembers paper tapes! Actually learned that for winding surveyor’s chains working summers in college. Started at a computer job, still using paper and mylar TTY tapes to boot some of the old machines. My mentor was carefully showing how to do it. I grabbed another tape and had it done before he finished his demo. But it serves the same purpose: rolling up the material without twisting it. The twists are easier to see with flat tape, but will cause kinking and tangles. In fact, I have a separate video just on winding wire and rope using that method.
@@practicalantennas1754 I was a Navy Radioman. Learned it there. I still use it almost daily to store everything from antennas to usb cords. Always love seeing the bewildered look on peoples faces who have never seen it being done.
Really good video. A live demo and to the point without a lot of fluff.
Just found this channel. Wow, it is truly the most practical antenna channel I've ever watched. Subscribed. And thank you, keep up the excellent work.
Thanks for the sub! More practical antenna videos coming soon :)
Looks familiar. My backyard is sorta like yours. There will be NO 100' tower antennas back there. No HOA's but across the street from our local airport. Drat. I wasn't a ham when we bought the house 38 years ago - ha. Thanks for the video. Simple and easy antennas to build.
Why is being across the street from an airport an issue ?
@@Thinks-First I'm sure there are city regulations about tower proximity to the airport. We're not talking miles. We're talking yards.
@@MrTommy001 Maybe not as much as you may think. If you are next to the side of a runway/s you should be able to at least put up a 45 fiberglass pole to hang some antennas on. Been a pilot and ham for decades and never heard of a problem with that. Even private communities I've flown into that have their own runways have no problem with towers and masts.
Is it possible to link details on your mast. Really good and informative video, thanks and 73
The mast is from Max Gain systems: www.mgs4u.com. Others have said that DX Engineering also carries them (or something similar).
I'm ashamed of how I've been doing it all these years. I can't believe I haven't dropped it yet as clumsily as I've been doing it. I wish I saw this when you put it out.
Congregações🎉🎉show de antena 73 PW8GTS
antiquation at its finest,
Nice idea and realization! 73!
I work on GP (2-nd construction in video), dipole and vertical dipole in the city. And I can say GP reciev mostly QRN. But other antennas have many QRN too 😒 unfortunately it is real of the cities
Bom dimais gostei.
very nicely done, Thanks Vic de KE8JWE
Great Job! Thank You :)
You’re welcome! I’m glad you liked it.
Thanks for shareing my bro 👍👍👍
this is so simple I cant stand watching it, drives me crazy!
This is one of the best antenna videos I've seen in a long time. Thank you! Been a ham since 1992 and learned at least 3 new things today.
You could build a Hentenna if your have another section of tent pole.
Yes, or a 50 ohm rectangular loop: practicalantennas.com/designs/loops/loop-sizes/ The Hentenna may have a slight advantage if high enough in the air, but things are more complicated over ground, where increased spacing between the wires (which improves gain in free space) is counteracted by the lower wire being closer to the ground, thereby contributing less to low angle radiation. For a further discussion see practicalantennas.com/theory/loop/full-wave/. Up to around 1 wavelength (top height), there isn’t a significant difference among them, with the delta (point down) having a slight advantage due to more radiation from the top wire, and it is easier to build then a Hentenna.
So both wires are connected to the centre wire in the coax?
Depends which antenna… For the dipole, one wire connects to the coax center conductor, and one connects to the shield. A balun is often a good idea, but not always needed when weight is a critical factor. For the ground plane antenna, both dipole wires are connected to the coax SHIELD to form the radials, and the added wire is connected to the center conductor to make the vertical part. For the loop, one end of the wire connects to the coax center and the other end to the shield. You can also make the loop by starting with the dipole and connecting the far ends of the wires together, but you need to add a bit more wire to get it to resonate properly.
@@practicalantennas1754 Thank you kindly for your reply.
@@practicalantennas1754I never thought of using a wire antenna to make a vertical before. That sounds like something fun to try out along with the delta loop. I had just been making dipoles or variations and end fed wire antennas. 73!
Where did you purchase the portable mast from?
@highflyer584: Check out: DX Engineering Complete Fiberglass Tubing and Cam Lock Clamp Kits DXE-TFK46-HD
The mast is from Max-Gain Systems www.mgs4u.com
What brand of fiberglass pole are you using?
Max-Gain Systems www.mgs4u.com
@usbp151check out: DX Engineering Complete Fiberglass Tubing and Cam Lock Clamp Kits DXE-TFK46-HD
Hi, I'm a new Canadian ham radio operator and I really enjoyed your video! I learned a lot from it. I have a small backyard in Toronto, about 25-30 feet long and 10-12 feet wide. I've built a random wire antenna, around 80 feet long, in an inverted U shape. I've been able to pick up many stations from the southern US, but I'm struggling to reach Europe and Asia due to my limited budget and terrain (my location is at a lower gradient than my neighbors). Could you please suggest some options for me to improve my signal reception? Thank you, 73. ve3cxv
That’s a lot to cover in this format! And I haven’t gotten a lot of that material written for my web site yet at PracticalAntennas.com. I’d suggest posting your question on the forums at eHam.net, or a similar site that is more conducive to an extended discussion with more participants. Just for starters: What is your background noise level? If the S-meter reads S6 on background, you need to solve your noise problem in order to hear weaker stations. Are you listening on the right bands when they are open? I’d suggest using VOACAP (www.voacap.com/hf/) to see which bands will be open at what times of day to various cities. I’m in Hawaii at the moment, and it shows (for 50 watts CW) the highest probability for a 20m contact is 65% at 0500Z, while 17m, 15m, and 12m have about the same chance at 1700Z. Then, of course, there is the question of what times hams at the other end will be on the air… On the other hand, if you get on the air during a DX contest weekend, you are likely to hear lots DX stations, although they won’t be in the mood for an extended chat. That’s even before we start talking about antenna choices.
I am in England and waiting for your call my Brother
Great video…… Lots of practical information….. helpful sketches….. And wonder camera and narration…… look forward to more……
Great video, I have the same sectional mast and wondered how to use it!
Glad you found it useful. Makes it easy to put up a triband yagi for Field Day. I use the same approach with other types of sectional masts as well (like sectional tent poles)..
What a nice realistic video this is! Best!
Great video Ty Who sells that mast?
The mast is from Max Gain Systems: www.mgs4u.com This one uses 4’ sections, but 6’ and 8’ are available. MFJ used to sell a similar mast for about the same price (I haven’t compared them) and you might save on shipping cost if you can pick it up at a local ham store.
It' similar to one made by DX engineering which I just bought and installed and it's excellent. Since he takes it down when not using it he doesn't need guy ropes, but if you're going to leave up all the time as I do it's useful to put in at least two levels of guy ropes which is very very very easy to do.
@ Thanks 73s
I like the realism of this video--going through the trees and brush to set up the various antennas. Sort of resembles a real life situation at your home or in the field. Great explanation of factors involved. A great hands-on presentation. Aloha es 73 de Russ (KH6JRM).
Thanks! That’s just what my backyard antenna range looks like. Makes life interesting. Currently on Maui - will see if I get a chance to try setting up the ground plane on the beach. Aloha!
Great video. Everyone who needs to get wire up onto a tree branch needs to see this. I spent a week practicing tossing a line up into a tree. I finally got it so I can get about 30 feet uyp. Thanks again for a great video!
Glad you liked it. I’ve been using it for around 40 years now, and I’m still learning new things: practicalantennas.com/construction/masts/bucket/ The quality of the rope does make a difference (especially in getting the weight back down), and a narrower bucket seems to result in fewer tangles. Now experimenting with a nylon bag instead of a bucket.
pretty cool
Excellent! We really like the actor!
thank you for coming to seapac. I cant believe you don't have more subscribers. 73
haha! working on getting the Seapac video up soon, so hopefully other people can enjoy. thanks for your kind words :)
Best video out there for this and it looks like you're using military surplus tent poles
You’re speaking a foreign language to the common person. Kind a like a realtor, (my wife)speaks of real estate deals. Breakdown your vocabulary.
Thank you for your feedback! Iʻll suggest a video/article that breaks down some of the vocabulary.
Oh my, you have an unusual voice for a grown man. :)
Haha! Iʻm Moss, Daleʻs Videographer and Editor. I do most of the voiceovers, and my voice is a little.... higher pitched shall we say.
Great video! Thank you.
an incredibly informative and well explained, and extremely practical video. I've figured out some of these things throughout the years and glad to see that I am not the only one using these techniques. The loading of the mast from the bottom is so practical. Thanks again!
I love it!
I truly appreciate your taking the time to make this video. I'm going to post a link for use as a training aid for my local Amateur Radio Emergency Service® (ARES®) volunteers. I hope that you won't mind my sharing some additional tips to go along with your mast raising technique. Attaching a halyard prior to raising the mast will make the antenna installation easier and faster. Using a guy ring made from cheap plastic cutting board or any piece of >/=1/4 inch thick plastic will permit the halyard to be at least slightly free of the guy lines. Installing 2 halyards is never a bad idea. All halyards should be made up as loops; called endless reeves by sailors; to prevent the rope from running through the pulley and falling back to the ground thus forcing you to lower the mast to reinstall the halyard through it's pulley. Antenna elements can be used as guy lines. This is especially useful for crossed dipoles with a common feed point. You'll have to devise a center insulator attachment which will withstand the tension. Tom Horne W3TDH
Hi Tom, Glad you found it useful. I tried to keep the video simple, so I didn't include the halyard or other additions on the mast to avoid confusion. I discuss those on the website, including photos of supports for dual halyards, etc. I've had many hams try this technique at my Field Antenna Workshops, and even those who weren't very tall or strong could set it up to 28' by themselves, although some might stop at 20' (which is often high enough). I made the video to share the technique with others who aren't local - it really is fairly easy to do. - Dale WB6BYU
@@practicalantennas1754 Fantastic video.
Great videos very interesting