1/4 vs 5/8 Wave Vertical Antennas Compared with MMANA GAL
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- เผยแพร่เมื่อ 11 ก.ย. 2024
- In this video, we model two ham radio antennas; a 1/4 and 5/8th wave using MMANA-GAL Antenna Modeling Software. Sponsored by www.pcbway.com Cheap & quick PCB, 3D Printing, CNC machining, and fabrication services from PCBWay.
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Yep, this confirms it, I'll be learning for the rest of my life. Thanks for exposing us to things that make our brains hurt...in a good way.
Lol. I spent the day winding toroids for my next video hopefully I can get to filming it soon.
@@TheSmokinApe ah the things we call fun
@@kdkinen lol
Thanks Ape. This is AWESOME. I have watched all of Callum's MMANA vids and he is a great explainer. But you say things in a different way and so I learn different things.
Glad you liked it and thanks for watching Randall 👍
Thank you so very much for the MMANA GAL lesson, if ever you wanted to do others on MMANA GAL it would be greatly appreciated, by more than just myself, thank you.
Yes, this is the best MMANA tutorial I've seen, simple, and to the point. Love to see one on EFHWs
DxCommander uses MMANA GAL as well.
I’ll do a few more Dennis, glad you liked it 👍
Yes, that’s where I first saw it Lee 👍
Glad you liked it Doug 👍
Wow! Obtuse?! Ape comes back from HamVention and gets to use those 50 cent words! 🤩
Lol, thanks for watching Richard 👍
I can't remember why I didn't comment before but thanks Ape. I learned some stuff about MMANA that I did not know. Great video.
Awesome, glad you liked it Don 👍
I really enjoy these more technical videos!
Thanks Ohaya, I try to mix it up a bit some there is something for everyone 👍
Hi Ape,
My God I wish I'd seen this video last week, I downloaded the MMANA software and got really pissed off with it. 😂
However, I went in totally blind without having read about how it works or anything.
Your description/tutorial, really makes sense now.
I have to say though I am a 5/8 wave fanboi, if you build them right, they are a lot more effective than a 1/4 wave or even a 1/2 wave.
Thanks for the video, mate. 👍
Hey Mike, glad the video was helpful. Thanks for watching!
Good job! I like how you got right into the models and didn't dawdle. Thank you!
Thanks 👍
Always a good video when Ape breaks out MMANA-Gal, hell I didn't even fast forward thru the PCB way commercial. Very cool tool
Lol, thanks Other Andy 👍
@@TheSmokinApe I think a full CaHR episode on MMANA-Gal and its features would be cool. Can't speak for others but at least I'd watch
@@AndyAAzeroAM just might do that
Nice one Ape. Those modeled matching values were close to my actual.
Hey Colin, you definitely piqued my interest 👍
Awesome video Ape! I need to learn this
Thanks Chuck 👍
Excellent tutorial on MMANA-GAL. Thanks!
Thanks Dan 👍
Thats a great video, never used the compare function before.
Hey John, that function is super helpful. Thanks for watching bro 👍
Well now I have another rabbit hole to dive down.
There’s always something 👍
Would be interesting to see the effect of height above ground, as it increases.👍🏻
You’re the second person to mention that, I suppose we can do a follow up. Thanks man 👍
for skip on the ground is fine ... but
in country.... hight 20m 1 wawelenght abowe ground
defently give a way falatter earth wawe... so the wawe hugs the earth way longer before taking off
in ARRL JESSUP and ROTHAMMEL a 1/4 has minus 1.5DBd andd a5/8 wawe has +1.5DBd
so 1.5 over a 1/2 half wawe and 3 DBD over a 1/4wawe. 3DBd is still 50% longer earth wawe.. then a 1/4 same hight..
remember 6DBd is X4 to dubbel RAnge .. .. a 5/8 Wave (7m) on 11m is a 1/2 on 20M 1/4 on 40M just do the math why make so freakin complicated.. if you use a SIRIO4000 8.4M long then You got a 7/8 (3/4) on 10 11 12M and a 5/8 on 17/20M and a 1/2 on 40M with Gamma Match it dont have to be complicated .. most amaturs like to complicate the antennas way too mutch
I want to put my Chameleon MPAS 2.0 antenna on our 2.5 metres high wooden timber pergola, clamp it with the Chameleon CMU, add a Cap-Hat, and as many raised radials as possible... God only knows if it will work... 😂
Love me a 5/8 antenna.
Who doesn’t?
Excellent and thank you for showing.
The thing i missed is a good radial wire network. In my opinion a vertical always depends on a good radial network. Not for impedance bit for take off angle. Otherwise you have no idea of efficiency in real life.
Yeah, they are very helpful for takeoff angle and minimizing ground loss 👍
Something to play with on a rainy night.
For sure, thanks for checking it out Lee 👍
That's a very powerful tool. I'm in a valley and I'll need to somehow measure take off angles and see if I clear the nearby hills or not first.🍻🤠
This should help you with that 👍
IMHO a 10m quarterwave at ground level is a poor choice, although MMNAGAL models it fine. Bearing in mind the real life environment that my vertical is in, fences, rose bushes etc relatively close in to an antenna that does most of it's radiation from the high current portion that is closest to the ground. The point being that the MMANA model might work if I had a football field to mount my antenna in but I don't, the antenna cannot directly "see" any sky at a 5 degree elevation. A current node further up, such as you have in the longer antenna will yield a lot more advantage in my environment than the MMANA model suggests. Too many hams have become slaves to SWR, and the resonant antennas nonsense. Best to get the pattern you want before devising how to drive it. With the ground mounted verticals raising the impedance also raises the efficiency, thank you for the presentation.
Thanks for the insightful post. I agree, the model is just that, I representation of how your antenna should perform in the conditions modeled. It would tell you have it will perform in real life.
@@TheSmokinApe thank you for the polite reply, as much as I love to use MMANA the real world environment is different. We are very fortunate to have some great tools available to us. 73
Thanks, Ape. Good video. But I got the Muppets Mahna Mahna song stuck in my head now.
LOL!
Great video Ape! I have used EZnec software before. It is a little more complex to use. I may have to try this one. Thanks for the video! 73
Thanks for checking it out Jeff, glad you liked it 👍
Great video. Have you ever tried modeling a 5/8 over 5/8 for 10 m. Would love to see the results 👍
Not sure I understand
@@TheSmokinApe 5/8 wave over a 5/8 wave ( one on top of another) for 10 m band
Oh, no I have not done that.
Thanks for the is Ape! I've never quite understood how to get better SWR with this program. Do you know of a way of adding steel sheet as ground in the case of designing a mobile antenna please?
Hey Ace, sorry man I am not sure about the sheet style ground plane.
@@TheSmokinApe Thanks Ape, now I know it's not just me being dumb. If I find the answer, I'll let you know. Thanks for your videos and keep up the good work.
@@acestudioscouk-Ace-G0ACE Thanks Ace, gonna try 👍
Outstanding
Thanks LC 👍
Awesome! Thanks 👍
Thanks for checking it out Bob 👍
Someone wants to do FT8? I would be happy at 28.915. Or in the voice portion. BTW, you did not investigate ground mounted vs raising it up.
I heard ham sticks were good for FT8! I guess I need to do Part 2: Above Ground and Inverted Verticals 🤔
If you wanted to raise the "wire" above a ground plane (and I realize you may not need one for a 5/8 vertical), which parameter do you change (Y2)? Also, if you wanted to add a loading coil at the base of the "wire" how can this be modeled in MMANA? Is that choice available in some tag in MMANA? Does anyone have a podcast that illustrates how to use the "Loads" section in MMANA? Thanks!
I haven't found a good solution for elevated ground planes using the ground radial feature. You could and extra wires in the geometry tab. If you chose the "setup" menu item you can change the feedpoint impedance under Standard Z to match your "load" coil, if that's what you are talking about.
@@TheSmokinApe I am trying to raise the antenna above the ground plane, not the ground plane itself. As you raise the antenna above the GP, the impedance will change, allowing for a better match between 50 ohm coax and a 5/8 height antenna without the need of any matching devices. Also I'd like to model a loading coil at the base of the antenna, and was wondering if anyone knew of a way to do this in MMANA? Thanks for the reply though. 73's!
Gotcha, not sure about raising the antenna w/o the plane. The was have have seen folks model the coil is by adjusting the input impedance but I get it's not that same. Sorry I am not more helpful.
👍
Thanks BA 👍
za szybko mówisz! nie można zrozumieć!
Well now I have another rabbit hole to dive down.
You can say that again 👍