this was a very practical view of Yagis! - thanks - I have learned very much about Yagi design from the NBS Technical Note # 688, which can be found all over the internet! It goes into very great detail about the optimum spacing, boom length, element length, etc., to get an optimum gain out of a given number of elements. This work was done at the antenna farm testing field way back in the old days, before WWV was moved to Colorado... but the practical tests should be no different to what makes the best antenna today!
I always wondered what the gamma match system was called. My work has a 3 element vhf yagi with that design on the roof. I didnt realize you could make the driven element all one piece that way, either. It reminds me of a J-pole antenna.
Thank you for all the videos you make - you're impacting a whole new generation of Ham Radio artists from across the globe. I can't thank you enough for all the effort and knowledge - you're the best!
I am getting ready for my extra exam and what do you know, you come up with an "ask Dave" question that is just what I need. I have no experience with Yagi's and probably will never own one, but they are on the test. So you did a good explanation for me. Thank you, Dave and 73s
The fact that 3-element triband trapped Yagi antennas exist, and work well, hints that the element spacing (in wavelengths) isn't all that critical; since in such a design one set of element spacings is being pressed into service on three bands.
I’ve seen hams almost come to blows over yagi design. My thought is spend the money on a Moseley or a similar antenna. They spend tens of thousands engineering them. I seriously doubt I can outdo them. Plus they last a very long time.
I am considering trying exactly what Dave said concerning a fixed wire Yagi. I have a fan dipole (40/20/10) in the attic and I could easily add a parasitic wire or two for the 20m with the right spacing. My house is arranged so that the antenna points approximately to Europe, so that's convenient. Eznec modeling shows that the 10 and 40 would not be greatly altered, but the 20m would see a good directional gain. It would kill my reach to the US west coast on 20m, but it would be a nice experiment anyway and easy to remove.
I have the a4s version of this beam, and like you mentioned it needs much room to turn, more room than I have between trees? Could this beam be reconfigured to become a kind of V shape where both sides is half vertical, half horizontal? I have seen a dipole that is made this way. I might could turn and use a V beam. LIKELY it would work not as well as being horizontal or all vertical? Anyway, the half-driven element mounted as a vertical works much as the 12AVQ you have spoken of?
hi, dave, you mentioned putting the antenna up, taking a reading, take it down, tweak it, repeat as necessary. many years ago in my pre-ham days i was present at 2 assembly parties in which the antennas were assembled on, AND tuned on, sawhorses, then just put on the tower once. i don't remember what the tuning devices were (mid-1970s), but probably were analogue. so, the question: does it matter where the tuning takes place? thanks! keep pumping out the vids. rodney KAØUSE
Hi Dave, I wanted better FM radio reception so I built a 5 element yagi-uda centered around 100 Mghz. My reception is insane now, compared to the indoor antenna I was using. My question is about picking up distant stations. I want to know if it is possible to use a dipole antenna, invert the signal, then use it to cancel out the strong stations the yagi and the dipole both receive? Maybe hear a station on the same frequency that is normally drowned out by a closer one?
I am currently testing some diy solutions for ADS-B at 1090MHz and so far I get best results with a spider antenna. Since I live in a valley with mountains blocking north/south, I am curious to make an antenna that is a bit more directional. I already built a small 3-element yagi and got a bit more range in one direction but of course lost some behind it. What would happen if I replace the reflector by a second director? Would that give me a two-directional antenna? Or is there a better design for my usecase?
Sir, may I ask. For a 3 element C.B. yagi, which configuration will have a stronger transmit, the driven element being closer to the reflector or should it be closer to the director? And 2nd sir, would it really matter having the yagi horizontally polarized and making a QSO with someone with a vertical antenna? Thank you sir.
For many years, Yagi instructions even in ARRL publications, have failed to uniformly or clearly show how Yagi elements are connected to the boom or each other. FWIW.
Nice video! Though I have to say, I cringe every time I hear "yagi" pronounced with a soft A sound. There really isn't a soft A in Japanese, and Mr. Yagi wouldn't have pronounced his name that way.
I speak Japanese - you are correct in that there are no long/short vowel sounds. However, the Japanese あ vowel sound is exactly like the English soft "A"...I'm sorry but this is the correct pronunciation.
@@Starfightermercurius so are you trying to say it doesn't rhyme with the "a" in father? My wife is studying Japanese, and she's never seen anyone say it's a soft "a" like in, say, "apple"... every native speaker i can find demonstrating the alphabet seems to agree...
I think there's a bit of confusion in what's a hard, neutral and soft vowel sound in English. The Japanese あ sound matches exactly with the "a" in "father", to which we are in agreement. The "a" in "apple" is not defined as a soft, but rather a neutral "a" sound. The hard "a" sound matches words like "able" or alien" Mr. Casler, in this video and many Americans, are pronouncing it incorrectly.
@@Starfightermercurius ah, makes sense. Interesting, I remember first grade very clearly, and was definitely taught soft A as I described. But I'll stipulate to your description!
this was a very practical view of Yagis! - thanks - I have learned very much about Yagi design from the NBS Technical Note # 688, which can be found all over the internet! It goes into very great detail about the optimum spacing, boom length, element length, etc., to get an optimum gain out of a given number of elements. This work was done at the antenna farm testing field way back in the old days, before WWV was moved to Colorado... but the practical tests should be no different to what makes the best antenna today!
Thanks Dave for answering a few questions I always wanted to ask.
I always wondered what the gamma match system was called. My work has a 3 element vhf yagi with that design on the roof. I didnt realize you could make the driven element all one piece that way, either. It reminds me of a J-pole antenna.
Thank you for all the videos you make - you're impacting a whole new generation of Ham Radio artists from across the globe. I can't thank you enough for all the effort and knowledge - you're the best!
I am getting ready for my extra exam and what do you know, you come up with an "ask Dave" question that is just what I need. I have no experience with Yagi's and probably will never own one, but they are on the test. So you did a good explanation for me. Thank you, Dave and 73s
The fact that 3-element triband trapped Yagi antennas exist, and work well, hints that the element spacing (in wavelengths) isn't all that critical; since in such a design one set of element spacings is being pressed into service on three bands.
I’ve seen hams almost come to blows over yagi design.
My thought is spend the money on a Moseley or a similar antenna. They spend tens of thousands engineering them. I seriously doubt I can outdo them. Plus they last a very long time.
Thank you very much... This is the best explanation I've seen so far. Take my like and my subscription, sir.
Thank you.
In the process of experimenting with Yagi Udas. N0QFT
I am considering trying exactly what Dave said concerning a fixed wire Yagi. I have a fan dipole (40/20/10) in the attic and I could easily add a parasitic wire or two for the 20m with the right spacing. My house is arranged so that the antenna points approximately to Europe, so that's convenient. Eznec modeling shows that the 10 and 40 would not be greatly altered, but the 20m would see a good directional gain. It would kill my reach to the US west coast on 20m, but it would be a nice experiment anyway and easy to remove.
Thank you for the ideas!
Excellent simple video with lots of info, thank you
Very helpful thanks
I have the a4s version of this beam, and like you mentioned it needs much room to turn, more room than I have between trees? Could this beam be reconfigured to become a kind of V shape where both sides is half vertical, half horizontal? I have seen a dipole that is made this way. I might could turn and use a V beam. LIKELY it would work not as well as being horizontal or all vertical? Anyway, the half-driven element mounted as a vertical works much as the 12AVQ you have spoken of?
hi, dave,
you mentioned putting the antenna up, taking a reading, take it down, tweak it, repeat as necessary.
many years ago in my pre-ham days i was present at 2 assembly parties in which the antennas were
assembled on, AND tuned on, sawhorses, then just put on the tower once.
i don't remember what the tuning devices were (mid-1970s), but probably were analogue.
so, the question: does it matter where the tuning takes place?
thanks! keep pumping out the vids. rodney KAØUSE
Hi Dave, I wanted better FM radio reception so I built a 5 element yagi-uda centered around 100 Mghz. My reception is insane now, compared to the indoor antenna I was using. My question is about picking up distant stations. I want to know if it is possible to use a dipole antenna, invert the signal, then use it to cancel out the strong stations the yagi and the dipole both receive? Maybe hear a station on the same frequency that is normally drowned out by a closer one?
I am currently testing some diy solutions for ADS-B at 1090MHz and so far I get best results with a spider antenna. Since I live in a valley with mountains blocking north/south, I am curious to make an antenna that is a bit more directional. I already built a small 3-element yagi and got a bit more range in one direction but of course lost some behind it. What would happen if I replace the reflector by a second director? Would that give me a two-directional antenna? Or is there a better design for my usecase?
Just came across this now, looks like it might be live. Interesting discussion. I learned a lot.
QUESTION: Looking for a supplier to purchase the aluminum tubing for antenna building. Any help is greatly appreciated.
Sir, may I ask. For a 3 element C.B. yagi, which configuration will have a stronger transmit, the driven element being closer to the reflector or should it be closer to the director? And 2nd sir, would it really matter having the yagi horizontally polarized and making a QSO with someone with a vertical antenna? Thank you sir.
For many years, Yagi instructions even in ARRL publications, have failed to uniformly or clearly show how Yagi elements are connected to the boom or each other. FWIW.
lol
What is the formula for lengths of the boom?
That was a very good video... Thank you.
What about small Yagi antennas for tv?
The older ones are log-periodic to get more bandwidth on VHF. They're much more complicated.
3:05 OMG, he's put the red pen into the blue cap. ;-)
THANK YOU 👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻
A comment (did not have anything to say today. I do benefit from your explanations. )
I know that I sleep better... LOL
Awesome 73 de N2NLQ
Just
Nice video! Though I have to say, I cringe every time I hear "yagi" pronounced with a soft A sound. There really isn't a soft A in Japanese, and Mr. Yagi wouldn't have pronounced his name that way.
I speak Japanese - you are correct in that there are no long/short vowel sounds. However, the Japanese あ vowel sound is exactly like the English soft "A"...I'm sorry but this is the correct pronunciation.
@@Starfightermercurius so are you trying to say it doesn't rhyme with the "a" in father? My wife is studying Japanese, and she's never seen anyone say it's a soft "a" like in, say, "apple"... every native speaker i can find demonstrating the alphabet seems to agree...
I think there's a bit of confusion in what's a hard, neutral and soft vowel sound in English. The Japanese あ sound matches exactly with the "a" in "father", to which we are in agreement. The "a" in "apple" is not defined as a soft, but rather a neutral "a" sound. The hard "a" sound matches words like "able" or alien" Mr. Casler, in this video and many Americans, are pronouncing it incorrectly.
@@Starfightermercurius ah, makes sense. Interesting, I remember first grade very clearly, and was definitely taught soft A as I described. But I'll stipulate to your description!
No worries - we're all in this together :-)
!שלום