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What does the Q of an antenna mean? It's easier than you may think.
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- čas přidán 3. 08. 2024
- Today I am discussing the Q of antennas. It is good information to know and I spent some time learning and trying to understand exactly what Q is and how it applies to us as ham radio operators. If you are studying for your ham license exams, this is a topic that will come up on your exams for both Technician and General. I am also announcing my new channel and details are below. Go check it out and please subscribe. It is always appreciated!
New Channel: The Fear of Cooking - bit.ly/3BySF2i
New Website for F.O.C - nofearofcooking.com/
✅Website: hamradiofornontechies.com
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✅Patreon: / hr4nt
✅My Amazon Store: amzn.to/3sSeA1n
✅Facebook: / hr4nt
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✅Twitter: / hamtechies
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✅Kit.co Product Recommendations: kit.co/ki5npl
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My Current Shack Setup:
ICOM IC-7300
Yaesu FT-2980
DX Commander Classic
Comet GP-9
Diamond GZV4000 Power Supply
LDG AT200 PROII Tuner
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#hr4nt
#ki5npl
#hamradiofornontechies
Thanks for a simple explanation to a true "non-techy".
Glad it was helpful! Thank you for watching and for the comment! 73!
The length of this vid was just about right. Most times I can't get the time to watch 15 min or longer vids. 10 min vids are ideal.
I do my best to keep them short as possible, but sometimes to drive the point home and be as detailed as possible they can get longer. Glad you enjoyed the video! Thanks for the comment and for watching. 73!
Nice presentation. It now makes a lot of sense that those long wire antennas have a low Q, and one’s with coils have a high Q. I’m waiting for an EFHW in the mail. Can’t wait to tackle that 130 ft of wire. 😂
Hey good luck to you. End Fed Half Wave antennas are my favorites so far. Try building one some time if you haven't already. They are just as much fun to build as they are to operate. Glad you liked the video. Thanks for watching and for the comment. 73!
My second video of yours and this is quality. One of my new favourite channels. Victoria, BC
Thank you very much! That means a lot to me! Thanks for watching and for the comment. 73!!
Scott, again another great podcast. You took a topic that might have been complex and distilled it down to something simple, easy to understand and demonstrated why it’s important with real world examples. We work with antenna Q when building or in the choice of antenna we use whether we know it or not. A beginner should have no trouble understanding antenna Q.
Glad you enjoyed it! Once I finally understood what it was, everything fell into place with my antenna builds. Thanks for the comment and for watching. 73!!
This article is fine as it goes being pitched at the basic end of antenna theory. People thinking on from this level will suspect that all is not as stated here, and to be fair almost everywhere, in discussion of antennas. One of the main points that leaves a lot of explanation hanging is the way we frequently jump from talking about an antenna element, the bit that is strung up in the air, and the antenna system as a whole which now has feed point, matching network and transmission lines in the mix. Much of the bandwidth of our antenna system is due to the feed and matching. Thats fine, mostly we just want to get our radio station on the air and this approach gets the job done.
So in the explanation of Q being the stored energies in the antenna and the range over which we have an acceptable SWR is a massive non sequitur, it just does not follow! Its another example of starting with an aspect of the antenna element, in isolation, and explaining it away in the context of the whole antenna system as seen from the coax plug that ends up in the shack.
The way we couple to any antenna element is at the mercy of physical properties like standing waves and current and voltage nodes. These change with frequency and yet we try to work with fixed connection points and feeder characteristics. Our connection scheme has now compromised the antenna systems frequency/matching range, not the antenna element.
Let me leave with point for people to ponder, a conductive antenna element in free space will have current and voltages induced in it from ALL frequencies of electromagnetic radiation, there is no preference for a particular frequency.
73 de G0AFV
That is a great explanation., Thank you for sharing! I do appreciate it! Thanks for watching and for the comment. 73!
AH. now I get it!!!! Thanks Jim M7BXT
Awesome! Glad it helped! Thanks for watching and for the comment! 73!
Hi SCOTT, sorry to missing the live chat. As you know Huracan Fiona raved havock on the electrical system here in Puerto Rico. 😥 Keep safe. 73
No worries. I am glad that you are safe and sound! That is much more important than just missing one of my video premieres! Stay safe! Thanks for the comment and for watching. 73!
Super helpful video. Thanks!
You're welcome! Thanks for the comment and for watching. 73!!
A low Q antenna has a wider band width but requires more energy to maintain specific frequency. More energy required to keep that pendulum and Ball swinging at correct rate or frequency, do you lose wattage or do you tax the final driver on the transmitter? You are probably taxing transmitter final or even the power supply if you are pushing max power on low Q antenna, bottom line it requires more energy to be resonant. Sure someone will debate this or correct me In some way but more energy required mean more load on Transmitter . Just my two cents Worth. Thanks for a Great simplified explanation very helpful :)
I am happy that you enjoyed the video and found it helpful. Thank you for watching and for the comment. 73!
Ham sticks sounds like a dish you could make on new channel 😊
LOL...right?! They aren't that great either. I just stopped using them. Much better and less aggravating antennas on the market. Thanks for the comment and for watching. 73!
High Q, low Q. An Antenna is one that gets you on the air communicating regardless of the Q, the SWR, the length, the height, how it looks. Just the fact that it works without destroying your radio and causing issues with your neighbors. Remember 100 watts and a wire are what has always worked📻📡
You are correct. I made this video as a response to a couple viewers questions. I agree, just get an antenna that works and go enjoy radio! Thanks for the comment and for watching. 73!
Good video brother. Keep it up. Will subscribe to cooking channel when I get to work.
Hey Lindsay, I really appreciate that! I am glad you enjoyed the video and I hope that you enjoy the new channel as well! Thanks for the comment and for watching. 73!
Congratulations on your new website,👍🏼 Your recipes are great 😃
Thank you very much. I have a lot more recipes coming so I hope you will try them out and enjoy them as well! Thanks for the comment and for watching. 73!
Just what I needed on the subject! Thanks man...
Glad you enjoyed it! Thanks for the comment and for watching. 73!
Very good explanation! Thanks for sharing.
I am glad it was helpful. Thanks for the comment and for watching. 73!
I'd like to see someone put a DXCommander on their car. That would be wild.
I think I would find that amusing as well...now that we are talking about it, watch someone will do it...LOL Thanks for the comment and for watching. 73!
Cal has a vid up with a DXC mounted on his tow bar, it is part of a longer one, but I am not sure if it was lost when his site went down a while back. Jim M7BXT
Excellent presentation! I had an idea but didn't understand how so thank you for your 4am research!🥱👍😄
Glad it was helpful! The way it was explained by the "experts" made it out to be so much more difficult than it had to be. I had a heck of a time getting a clear answer, so I am glad that this video was able to clarify the topic! Thanks for the comment and for watching. 73!
Generally, the shorter an antenna is relative to the wavelength of the band you're using it on is, the crappier it will perform. Plain and simple.
Great tip! Just wish those that write about these topics made it that simple to explain. Thanks for watching and for the comment! 73!
Thanks!
Thank you for watching! 73!
Love ur channel I am just a technician could u make some shows about how to program radios. . I have a Kenwood 261 a that I just got and struggling how to program it ..
On of the only reasons that I don't do those type of videos is that someone else probably has already and it helps to have the radio in person to show how to program,. There are so many radios out there and I only have a small collection of them. I looked up your radio and it seems that any "tutorials" on that model are in a foreign language. If the radio is capable, you can try programming software, but not al radios have that ability to be programmed, but it would make short work of getting that done. Thanks for the comment and for watching!!! 73!!
Thx 👍👍
You're welcome!
Video starts at 3:45
Thanks for the comment and for watching. 73!
Thank you for your explanation of the q factor. So a 20 meter dipole would be an example of a low q antenna, correct? Also ,the swr reading is just to give you reference points for f2 and f1?
Very nice explanation of "Q" Scott!! Have had my "General" for over three years now and I have yet to put up an antenna at my QTH as I got interested in woodworking and have been busy building cabinets for my shop. I used to be a "Ham" back over forty years ago and only got to Novice and used a vertical antenna ground mounted with a Heathkit I bought from a college student. I really liked CW and hope to get back to that someday soon. Unfortunately, I didn't know as much about the hobby as I do now and I was coming through my neighbors TV set and would get calls from her and finally received a notice from a local ham that I was putting out spurious signals so that was the end of that. Now I'm retired and have a decent residential back yard and am considering everything from a dipole to a SteppIr antenna without a tower as I'm pretty sure I can do fine without one. Anyhow, that's my story and I'm sticking to it. I'm going to check out your cooking channel next as I also llike to cook, bake and BBQ (Smoke). Thanks again for the explanation of Q, it was very helpful.
Hi Dennis! Wow, what a great story! If you have the budget for a Steppir, I'd say go for it!! They are fantastic performers. I too am a woodworker. I actually just got back into my shop for a change of scenery and to build a new project. Thank you for checking out my cooking channel! I will have more video in the future. I hope that you will enjoy them all! Thanks for watching and for sharing your story! 73!
Thank you and another great video. It definitely helped me to understand it. I also did not understand Q and just tried to remember the answer for the test if it came up. I am still very new to this and just took the test last year. I did not know that the ham sticks were a high Q antenna, and I was looking at building a setup using several ham sticks covering different bands. I'm sure it would still work but not sure it will give me the band coverage I was thinking I would get. But still might be worth a try to see how it would work. Am I understanding correctly the DX Commander is a high Q antenna?
Ham sticks are ok as long as you don't mind tuning them for various frequencies often. The DX Commander from my understanding is a relatively low Q antenna. I have mine tuned up and it doesn't require a tuner to operate on the various bands I have mine set up for. I hope this helps. Thanks for watching and for the comment! 73!
Long live the Q! Lol
LOL...Yes!! Long live the "Q"! Thanks for watching. 73!
Question I was thinking why you use 73 on ham as a sign out or to say bye. This might sound crazy but bare with me. Ok 7+3=10 right? Then 7-3=4 correct? So....that a big 10-4 good buddy....yeah? Or is that just a crazy coincidence?
I think it may be a coincidence. It is interesting that you noticed that. I am not sure about the origins of "73", but we use it. Thanks for the comment and for watching!!! 73!!
Ah Ha!
Thanks for watching and for the comment. 73!
I'm a new ham but I've always liked food. 😂 KF0KDE.
Hey Danael, I hope you check out both this channel and the new one as well. Thanks for the comment and for watching. 73!
Jonathan De Lance lol
LOL.. Thanks for the comment and for watching. 73!
I am a channel subscriber, and I do not usually do this, but I had to give you a thumbs-down for this one. The primary reasons are twofold, and I make these suggestions as one who was an adult instructor for almost 25 years in a different industry.
In the beginning, you spent a long time on the announcements of your other new channel. It is a distraction. Then, after that, you did the one thing no instructor should ever do: you read from what appears to be a very complex PowerPoint slide. If the lesson is that, why not just provide the document for us to read by ourselves? The better way would be to list some--not a lot--bullet points and you personally explain each one. That way, YOU are the focus of the lesson, not the tiny words on the screen
I made all those mistakes and many more in my career, and as a new ham, I want to learn from the experts, but I do not want to read words on a screen for those lessons. Thanks for reading!
I am sorry that my presentation did not meet your needs. People ingest information in various ways and by having a presentation there and adding my own commentary as I go along has worked for many in the past. Thanks for watching and for the comment. 73!!
Took forever to get to the point or topic. I saw the same Internet article he is trading from. Water and pendulum has nothing to do with antennas and electromagnetic waves.
Thanks for the comment and for watching. 73!