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Пікірлер
@elwood.downey 4 күн бұрын
Very nice integration. Also appreciate the ability to define structures with code as in cocoaNEC.
@Masirah1 13 күн бұрын
Very nice job
@ominguti6345 Ай бұрын
On Linux (debian bookworm) the moment I try to do exactly that and I connect the second point of NEC source to P2 the name NecSrc1 gets red and I get a straight line on th esmith chart. From then on it will not produce a NEC chart. No matter what. This is on x64. I can go and execute nec2c executable for ubuntu and it works, but simnec can't for some reason. This is the latest version with no JRE (I already have JRE 17 installed). WhenI expand the errors field I get "Missing NECUnits statement <2 times"
@dougbas3980 Ай бұрын
What a powerful tool! Thank you for what you have given us! I am learning so much.
@dougbas3980 Ай бұрын
Thank you for all you do for us! It is very much appreciated!
@chrissuddell7940 2 ай бұрын
Ok, that is an amazing way to model the EFHW. I for one will be using this. Thanks for the video.
@michaelalex5235 4 ай бұрын
For completeness, can you please specify the location of the *.jar file to be downloaded? Assorted Google searches don't even find it. Thanks.
@ae6ty 3 ай бұрын
www.ae6ty.com/dsp-explorer/
@charlesspringer4709 4 ай бұрын
Can't find it. Search is flooded with something from Google.
@ae6ty 3 ай бұрын
www.ae6ty.com/dsp-explorer/
@galileo_rs 4 ай бұрын
Video ends abruptly, check the source footage?
@gdvissch 4 ай бұрын
Great stuff, thank you very much. Will check out the whole series!
@erikyoung5139 4 ай бұрын
Wish I had known about software suites like this in gradschool.
@danielrodriguez1224 8 ай бұрын
love you mate
@lariroli 8 ай бұрын
Thanks.
@Engineer_Stepanov 9 ай бұрын
Best of the world!
@patrickbouldinkm5l143 10 ай бұрын
Hi Ward, I was following along and building the dipole just as in your example. At about 05:30 you directly connected port 2. I did all the same steps but after I made that connections the X values did not change, as it changed on yours. Is there a special key to hit that makes it run (it stayed at R=50 and X = 0) ? Everything looked like yours except the impedances are not calculating. 73, KM5L
@MomL-w5o 10 ай бұрын
Hello Ward, Would you mind sharing the circuit description of your end fed antenna. I'd like to start with a working circuit description, to help me understand SimNEC. Thank you.
@ae6ty 10 ай бұрын
There are many examples of circuits in the .SimNEC directory in your home directory. Something like $HOME/.SimNEC/2/1/Examples will get you there. There are several EFHW examples in there. Look to AC6LA subdirectory.
@karlkulp6013 Жыл бұрын
Wow Ward, very interesting analysis. Nice job. Thanks for all of your work on SimSmith and SimNEC.
@wb7ond Жыл бұрын
Wow, you nailed it, everybody is building EFHW, qrp, POTA, including me... Thanks for the great software and all the tutorials, both yours and Larry's instructional videos, learn a lot about rf circuits also... You must have many, many hours on this project, as well as Larry... 73 and thanks again... wb7ond
@Masirah1 Жыл бұрын
Thank you
@stanholmes4293 Жыл бұрын
What a powerfull software tool - Thank you 73
@WECB640 Жыл бұрын
Amazingly POWERFUL software! BRAVO. 73 OM
@grecomassimo9207 Жыл бұрын
Hello, I downloaded the software and updated java but I always get the startup error something with java I use win7
@RSP13 Жыл бұрын
Nice. Thanks
@no5x937 Жыл бұрын
Where did you move necCrewSize in Preferences in your simNEC 1.8 b1 version?
@ae6ty Жыл бұрын
Under 'view/nec Portal'.
@johneslaughter Жыл бұрын
To make this work in version 1.8 b3 you need the declaration dcl NECUnits="meters";
@Aimsport-video 8 ай бұрын
where? I am having this issue.
@pgramsey1 2 ай бұрын
@@Aimsport-video In the text box. Where it says //name , enter NECUnits meters; under it.
@no5x937 Жыл бұрын
I've used SimSmith for a number of years so I'm familiar with most blocks. However, SimNec is new to me and I followed this tutorial but I'm getting different results than you. R = 6.216, X = - 2.968K, etc. While your R = 73.96, X = 13.42. Any ideas?
@no5x937 Жыл бұрын
ae6ty, please update this video with adding: To make this work in version 1.8 b3 you need the declaration dcl NECUnits="meters"; as described by @johneslaughter 73, NO5X
@bob_mosavo Жыл бұрын
Thanks 😁
@PatAutrey Жыл бұрын
i'm trying to learn of how to apply what you see in the Smith Chart to an actual antenna system- and just need some help knowing when to use a section of coax to duplicate the capacitance needed, especially how to add these in parallel. Do you have any videos that teach these principles? of when and how to add different inductance and capacitance
@ae6ty Жыл бұрын
You may find this video useful. I believe W0QE (Larry Benko) has a video titled something like "12 ways to impedance match' or some such. kzbin.info/www/bejne/norYnKaIg6uKgpI
@PatAutrey Жыл бұрын
@@ae6ty thank you!
@kennymanchester Жыл бұрын
Extremely useful tool. Wow. Many thanks
@milesprower6641 Жыл бұрын
the drop box directory for SimNEC was deleted and I am unable to download the program. is there another was of obtaining it?
@CircuitShepherd Жыл бұрын
👍😉
@IngAvila_GDLMX Жыл бұрын
Man, you are great! Thanks a lot!
@dandypoint Жыл бұрын
You are working only with the red circle. What are the pink and black circles?
@TheElectronicDilettante 2 жыл бұрын
Thanks for all your great videos. First, Do you know where I can find appropriate driver for the NanoVNA Connect. I’ve looked on all the NanoVNA usual spots and no luck. Also, You stated that your home made RC circuit is a series RC… Is it not Parallel? If I’m wrong , my apologies. Thanks again for your time. - Jason Burchell
@bruceblosser384 2 жыл бұрын
i completly do NOT understand what you are doing here, or why you are doing it!
@ae6ty Жыл бұрын
In this video I use SimSmith to calculate the feed point impedance of an antenna. Having this, I can analyze the feed network and determine the power losses. I can also optimize the circuit to achieve other goals such as efficiency or bandwidth.
@patrick4228 2 жыл бұрын
As Mr. Burns would say, "Excellent". Many thanks for this fantastic app.
@MattHeere 2 жыл бұрын
Hi Ward. Just wanted to say THANKS! for all the hard work you've done on this software over the years. One of the most useful tools in the toolbox for both design and teaching. 73
@josefvogl1161 2 жыл бұрын
Great tool!!!
@enojelly9452 2 жыл бұрын
Great video, thanks. I wanted to ask why there is no Z block anymore, in recent versions of SimNEC at least? I think I achieved the same by using "meas = file[]; Thev(Conj(meas));" to add the impedance of my generator that I measured with my VNA. My goal was to know how much power at what frequencies gets transferred from my antenna/receiver combination. I measured both (the receiver directly at its input, the antenna at the end of its feed line that connects directly at the receiver's input) with the VNA, and assigned the csv of the antenna measurement to the load, the csv of my receiver to the generator as mentioned above. Is that a valid way to do that? At least I do see power being largest where the two impedance measurements coincide visually. (In reality load and generator are reversed, but I think that does not matter because of antenna reciprocity.)
@bartolomiuschristoffel8108 2 жыл бұрын
Thank a lot sir, God Bless u
@lolvivo8783 2 жыл бұрын
What is the license for simsmith/ simNec? Is it gnugpl or other Floss license? Thank u for your work.
@ae6ty Жыл бұрын
SimNEC is offered under the MIT license. See 'about SimNEC' to find a pointer to that license.
@troy3456789 2 жыл бұрын
There are no videos that simply explain "feed point impedance", and show what they mean. I see a lot of questions on this on the extra test. I don't know what it means. I think a ham should make a video about it, and show their work. I do not know what what your drawings are. Many of these hams that make these videos assume their audience is composed of seasoned experts.
@pauluzs 2 жыл бұрын
Hi Ward, Thanks for both the video 's and for SimSmith. Here's how to find the angle for the 2 12th wave transmission lines: ************************************************************************ //12th wave Rad = Atan(1/Sqrt( (T1.Zo/T2.Zo) + (T2.Zo/T1.Zo) +1 ) ); Deg = Atan(1/Sqrt( (T1.Zo/T2.Zo) + (T2.Zo/T1.Zo) +1 ) ) * 180/Pi; L.johms = 0; T1.Zo = G.Zo; T2.Zo = L.ohms; //T1.@MHz = G.Mhz; //T2.@MHz = G.Mhz; //T1.~deg = Deg; //T2.~deg = Deg; ************************************************************************ It's possible to change the degrees by hand and get the correct lengths. Could you tell how to automate the last 4 variables in SimSmith ? Tough Simsmith suggests ~Mhz and @deg , it doesn't seem to like them. This would automatically calculate the lengths by Gen frequency. Greets Pauluzs
@ae6ty 2 жыл бұрын
Please send me mail directly, there is an undocumented (and hence unsupported) mechanism which may or may to work. ward dot harriman at gmail dot com.
@kimhawkk9544 2 жыл бұрын
I look up to you and really appreciate your works.
@singlehanded12 2 жыл бұрын
Grateful for the effort and availability of this Awesome software, I have been playing with (And learning ) this software since December 2021, Thanks for making it freely available, Awesome stuff.
@karlkulp6013 2 жыл бұрын
Wow Ward, you certainly have been busy! I am anxious to give SimNEC a try.
@stevedick5479 2 жыл бұрын
Quite a nice tool!
@JimAndyAllyn 2 жыл бұрын
Awesome!
@joeking5211 2 жыл бұрын
All fell apart @ 0:28 into the vid, there is no 'Recommended' option on the site, but thks for your efforts. Can't understand the below Robert Sisco comment either re the dropbox method, there is only an html graphic showing a picture of a folder content on the page, no hyperlinks to click so will assume the site is no longer being maintained or broken, a shame this looked very helpful,.
@galileo_rs 3 жыл бұрын
After a quick glance it looks like this method could be used to subtract test jig effects and for 2 port single path VNAs (like the NanoVNA) the effects of port2 and cables or adapters used to connect from calibration plane to port2?
@ae6ty 3 жыл бұрын
The video and the 'correct' block does not support a 'Through' measurement. I've been thinking about doing that as well. BUT.... devices like the nanoVNA generally already have the ability to do custom calibration for things like test fixtures. Also (shameless self promotion), SimSmith's "nanoVNA Connect" does provide for full custom calibration.
@galileo_rs 3 жыл бұрын
@@ae6ty That is more or less correct but there are some issues. For example, I have a set of characterized standards that I can use to calibrate my Nano at the end of a cable, as soon as I connect a test jig to it I'm measuring the test jig and the DUT combined. Now I can create a set of "standards" for the jig and use that, as is commonly done, but that presumes the "standards" that I made are ideal and that leads to issues. In theory I can use the first set of standards to characterize the second set, including the jig, but I failed at it and need to do a bit more research on how to do it properly. Kurt Poulsen shared his method via VNWA software so that is the next thing on my TODO list. Since the Nano is a single path device (can't measure S22 and S12) I cant use the "Y21 method" to remove the parasitics. Additionally it makes a significant difference how the test jig is connected to port2. For example when measuring high impedance, using the S21 method, best results are obtained when the test jig is connected directly to port 2 and not via a cable, as is commonly done. This should have probably been posted to SimSmith mailing list I guess?
@ae6ty 3 жыл бұрын
@@galileo_rs Yes, this would be better on the SimSmith groups.io forum. I've been playing around with the idea of allowing an impedance file to specify a 'reference'. Doing so would allow references other than 'Short', 'Open', and 'Load'... they could be 'load1', 'load2', and 'load3'. The math is the same. I've not thought much about what 'through' would need, nor just how different the three 'loads' would need to be to provide high quality answers. This would allow you do characterize your custom 'standards' and then characterize your test fixture using the custom standards. I'm still in the dark about how to deal with the 'through'.....
@galileo_rs 3 жыл бұрын
@@ae6ty I always try to use the "zero length through" by connecting directly to second port but when that is not possible the NanoVNA Saver patches for "enhanced response calculation" appear to help. If memory serves me well I believe that I shared the link for that in SimSmith group. It is not perfect as it makes some assumptions about the through used. I will post a message on Groups forum.