Introduction to Antenna Modelling - MMANA-GAL
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- Опубліковано 24 бер 2022
- Antenna Modelling is a fun part of the hobby all by itself. Modelling your antenna and then understanding a far field plot - and how things might change is a lot easier than going out into the field and seeing for yourself - although I would encourage you to do both! How to use MMANA. Callum, DX Commander.
Download here: gal-ana.de/basicmm/en/#180
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Callum I learned about your UA-cam difficulties on QRZ and had to come here to look. I'm relieved to see you're here again, and I've re-subscribed. This kind of stuff is gold for all hams, and for me as a fairly new technician trying to build a shack up you're one of my best resources for learning. I hope you never stop and never slow down. God bless. KK7AWK
Thanks Chip!! Welcome back :)
I remember watching this when it aired . I've gained alot of knowledge from watching you Callum. Still think it's a shame about the original channel . Looking forward to your next video . Studying for the test ,hopefully be taking it soon 😀
Ah great! Good luck.
@@DXCommanderHQ I Was wondering u had a video on how to model a loading coil in mmana gal but i cant find is there any way you can revist it it because i want to know how to do this so i can model a loaded antenna to build for mobile setup pleas and thank you. If not that fine too
Thank you so much for sharing all of your knowledge and wisdom. You've given me inspiration to delve into this more.
Wonderful!
Hey cal,made my first home made doublet yesterday n wow what a performer at 51ft :) thanks for all your videos and time!! Loving this dx that I've never even heard before:) 4 new countries today and apparently not very good conditions 👍thanks very much 👍
Great to hear!
A great vid Cal, helped me no end in gaining an understanding of magic.
This video got me started on MMANA... Wonderful tool - thanks Cal!
Glad to help!
Watching this made the penny drop. The inverted V centre was driving me mad. Thanks again Callum.
Thanks for bringing this back! I was working my way through it when the borg attacked.
Ah!
Great to watch again was a information packed video for sure. Rock on commander
Rock on!
Very interesting video, thanks Callum!
It is always pleasant to listen you. Right now I am running antenna optimization in MMANA-GAL program. It takes forever to optimize weirdo test antenna.
Haha yes!
Awesome Callum
I like the way you differentiate between discovery and invention. My personal history has involved a lot of what I call "unintentional re-invention" in that I have come up with some really good ideas, only to find out that someone else has already put them on the market. Well, maybe that shows I've had some pretty good ideas. Anyway - thanks for all you do.
BTW, I just came across a paper that uses the method of moments in determining relativistic hydrodynamic viscosity. How's that for getting a few steps past Herr Hertz?
"All models are wrong. Some are useful" - George Edward Pelham Box, a pioneer in the design of experiments and in Bayesian inference.
Fantastic video, thank you
That's a great video, Callum. Is there any way in MMANA, when modelling a vertical, that I can see and calculate what happens if I omit a whole 180 Degrees of radial wires? Do I get any gain in the direction of the half radial bed, compared to the far-field signal strength of a complete 360 degree radial bed measured at the same far-field location?
What would happen is that you would get marginal losses where there are LESS radials and about the same where there ARE radials.. Maybe just add some more :)
Thank you you are a legend
Thanks for demonstrating MMANA, I have been meaning to acquire antenna modeling software. I am a bit envious of how proficient you are with it thru experience, but maybe in time...
As a bit of a sidenote & this is not at all a criticism and I can see why intuitively people gravitate to it, but you have to be careful that you don't use circular logic when attempting to show validity.
For example, if I said, "I am present here" proves "I am present here."
I have taken as true what is attempted to be shown true & I am using it to establish what I am trying to show as being true in a circular path.
Likewise:
If you take 1 stick & add it or combine it with 1 other stick you have a result. If you then say, because (1stick + 1stick = 2sticks is true because 1 + 1 = 2 is true) we then must have it follow that 1 + 1 = 2 is true.
We have a circular argument was utilized much like my first example.
The Natural numbers were really studied seriously in the late 1800's and a fella named Giuseppe Peano is given credit for essentially defining the Natural Numbers by establishing axioms that when taken as true give the Natural Numbers defining characteristics. No surprise the axioms are called the Peano Axioms.
Using the Peano Axioms as a basis or platform to apply formal logic to, there are several ways of proving addition on the Natural Numbers with perhaps the easiest for those that don't spend hours a day studying Number Theory being proof by Induction.
Out of the original 5 axioms some incredibly interesting results have appeared, but that is really too big of a topic to discuss here. On the other hand Number Theory while not easy is acessable to people who have just the skills provided by public school and can be as big a rabbit hole of interest to fall into as Amsteur radio, so by all means if intetested give it a go.
I had no idea I was using circular logic.. Apologies.
@@DXCommanderHQ no problem at all, its actually easy to miss and part of why serious proposals are reviewed by others as a check against error.
Thanks for your videos...
Good material Thank's
You are wonderful teacher; I wish I could be with you to learn the real antennas. However, Many thanks dear teacher.
You are welcome!
Gotta love the spherical nanosphere
Great video, I'm looking forward to doing some antenna modelling. I'm getting the German version when I download from the link in the comments. Is there something I need to do to get English? Thanks.
Erm.. I thought you could select the language when you installed..? If not, just delete it an re-install.. Or google it "MMANA-GAL DOWNLOAD" (sorry if I misled you)
@@DXCommanderHQ Thanks, I didn't see an option during installation (probably missed it), but there is a Language option under "Setup" (in German Einstellungen) and that let me set it to English.
Hi Callum. I just just taken up antenna modeling again. Looks like the MMANA- GAL videos have gone. Are they due to be reinstated. ?
Yes I will be re-recording once I have the racking in next week (new shop) and my new audio gear back installed. Gimme a month. There are some on this channel though..
out of topic i know but what ever happened to the cb radio you got for christmas ?
I still have it.. The rig switch is labelled (at the office end of the coax run) and now we have the remote coax TX switch in the field, we can start to plan an 11/10m antenna!
FYI, the MMANA-GAL link is not in the description if anyone is looking for it.
OK, try a Google search - shows up pretty fast. Thanks. I'll try and fix shortly.
Hi Callum, I am having to do a station review before putting up a vertical antenna. I am in a drone no-fly zone since being approx 3/4 mile from airport. The FAA is asking me about antenna gain on the 18meter nebula. I am a new ham and still doing the hands on learning. Can you help me out with that data to make FAA happy. 73 KL5NU
Tell them gain is NO MORE than 1.2dBi at 20 degrees above horizon. At 5 degrees, it's -5dBi (yes, minus 5).
What am I doing wrong? 10m vertical standing on the ground. 28 radials. Source at ground level. F 14.15MHz, gives R 2499, SWR 50.5, Ga dBi 0.11 ????😗 73 de LA5VL Vidar
Reduce the height to 5.2m
thank you!
Yes, there was Tim! No worries!
Excellent vid! Thank you fer posting! Let’s jam!
Rock on!
beens...i am confused ...what happened to the bananas?
KO4LFE Thank you Cal..👏
Any time!
i might be missing the point here but how can it be a dipole when there's only one piece of conductor? i speak as a person who sees antenna theory as a black art
The conductor is effectively "split" where the coax joins. You can't see it in the diagram - and actually you don't need to draw that, the maths assumes it. Good question.
Two beans plus two beans is "some beans" according to Baldrick from Black Adder.
...Just a random note.
.. or a very small casserole..!!!
Amateur engineer