I just started watching your channel and I find it very interesting. I do love the fact that you explain everything. Antennas are not so easy for me to understand. I am trying to get a grasp on the smith chart. Thank you again for sharing. Do you have any suggestion on a great antenna book? KO4UWU 73
Dear Sir, thank you for this video, and your excellent presentation. It would be helpful to learn your design radial length. 1/4 wavelength for a single band antenna? With multi-band, would there be 1/4 wave radials at the longest wavelength? Thanking you in advance. 73 KQ4IXD
Elevated counterpoise n vertical works awesome, lot of gains, but you also have to extend the vertical. Example is my 17 whip on 10m instead the 99",i need 118" for swr of 1.1 with 2 elevated counterpoise.
You may be technically correct, it may be an Unun. It depends on how you look at it. If you look at it like a ‘mirrored dipole’ then it would be a balun. In any case, I use it more like a common mode choke.
This is interesting sir. But may I ask. Is it possible to make a quarterwave antenna without any BALUN like a quarterwave radiator and radials that is at 45 degree angle like I used to do on the CB band? I mean if it works on the 27MHz band does it mean it may or may not work on other bands? Thank you.
Yes, you are correct. The impedance is about 40 ohms, you do not need the balun. But, may I suggest that you watch the video in the description, it will show you how it helps with noise. 73,Paul.
I am campaigning for ham radio people to drop the clunky VSWR measurement and use return loss instead. It is a much more informative presentation of the same information, partuicularly when the match is good.
@@W2PAK @donepearce Interesting initiative. I'd agree that the dB representation can highlight differences in matching more clearly to the human eye, making it appear “more precise.” 73 from Germany, DF1PC
I am with you 100%. The FCC will have to change it exams however before we can replace VSWR with return loss. I teach VSWR so students can pass their license exams, but I explain it in terms of return loss and that VSWR is a throwback to the old days when reflected power was first discovered.
@@thelongislandguy Baby steps? Maybe they could include return loss as an alternative answer to the question about VSWR. That would be a start - then in mybe ten years, delete the VSWR part.
Not too many of you get the vertical. I use a pencil and a mirror as a example. Where as the pencil represents one element of a dipole and the mirror represents ground. Place the pencil perpendicular to the mirror (ground) and you see two pencils ✏️ (elements) . The more radials the shiner the mirror the better the image the better the performance. Of course you get it. You did fail to mention how the radials will capacitivly couple with a good ground and why insulated wire is just acting as the dialectic of a capacitor thus no need to use bare copper no biggie
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I just started watching your channel and I find it very interesting. I do love the fact that you explain everything. Antennas are not so easy for me to understand. I am trying to get a grasp on the smith chart. Thank you again for sharing. Do you have any suggestion on a great antenna book? KO4UWU 73
Thank you for the nice words, I'm glad that the videos are helpful. 73, Paul
Dear Sir, thank you for this video, and your excellent presentation. It would be helpful to learn your design radial length. 1/4 wavelength for a single band antenna? With multi-band, would there be 1/4 wave radials at the longest wavelength? Thanking you in advance. 73 KQ4IXD
That is a great question. With a multiband antenna I usually try to use 4 x quarter wave radials per band. 73, Paul.
Elevated counterpoise n vertical works awesome, lot of gains, but you also have to extend the vertical. Example is my 17 whip on 10m instead the 99",i need 118" for swr of 1.1 with 2 elevated counterpoise.
Thanks for sharing. Yes , there are several commercial antenna with elevated counterpoise. They work well. 73,Paul.
What were the software programs you used. N3XUS
Thank you for the question. For the antenna simulation I used cocoaNEC. 73, Paul.
what balun do you have there? 1:1 transformer voltage? or common mode choke?
Please check the description, there is a link to a video on how to make the balun. 73, Paul.
Why is it a balun rather than an unun?
You may be technically correct, it may be an Unun. It depends on how you look at it. If you look at it like a ‘mirrored dipole’ then it would be a balun. In any case, I use it more like a common mode choke.
This is interesting sir. But may I ask. Is it possible to make a quarterwave antenna without any BALUN like a quarterwave radiator and radials that is at 45 degree angle like I used to do on the CB band? I mean if it works on the 27MHz band does it mean it may or may not work on other bands? Thank you.
Yes, you are correct. The impedance is about 40 ohms, you do not need the balun. But, may I suggest that you watch the video in the description, it will show you how it helps with noise. 73,Paul.
I am campaigning for ham radio people to drop the clunky VSWR measurement and use return loss instead. It is a much more informative presentation of the same information, partuicularly when the match is good.
When I used to do RF engineering, we used return loss. I wonder what everyone else thinks about it. 73. Paul.
@@W2PAK @donepearce
Interesting initiative. I'd agree that the dB representation can highlight differences in matching more clearly to the human eye, making it appear “more precise.”
73 from Germany, DF1PC
I am with you 100%. The FCC will have to change it exams however before we can replace VSWR with return loss. I teach VSWR so students can pass their license exams, but I explain it in terms of return loss and that VSWR is a throwback to the old days when reflected power was first discovered.
@@thelongislandguy Baby steps? Maybe they could include return loss as an alternative answer to the question about VSWR. That would be a start - then in mybe ten years, delete the VSWR part.
How long should the radials be?
Not too many of you get the vertical. I use a pencil and a mirror as a example. Where as the pencil represents one element of a dipole and the mirror represents ground. Place the pencil perpendicular to the mirror (ground) and you see two pencils ✏️ (elements) . The more radials the shiner the mirror the better the image the better the performance. Of course you get it. You did fail to mention how the radials will capacitivly couple with a good ground and why insulated wire is just acting as the dialectic of a capacitor thus no need to use bare copper no biggie
Love that analogy ! I will remember that, thanks for sharing. 73, Paul.
Thanks for sharing, only use elevated vertical here,my 2 ele parasitic vertical gives me 2 S points gain long path. 73 zl3xdj
Thanks for the comment. I hope to catch you on the air. 73, Paul