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#1
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Help with slim jim nec model
It just keeps saying each line in that formula has a syntax error.
Hmm. Well, I'll start reading all of that stuff... Maybe it will sink in. |
#3
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Help with slim jim nec model
On Wed, 24 Sep 2008 19:34:29 -0700, Jeff Liebermann
wrote: It just keeps saying each line in that formula has a syntax error. Hmm. I broke down and read the documentation. File - Import Card Deck Load the Jpole.NEC file. It shows up correctly in the "card view" but fails to appear in the "element inspector" and "spreadsheet view". When I try to run it anyway, it complains with: "NEC-2 error. Possible wire element that touches z=0". No clue which card (line) it hates. I'm going to give up in disgust for tonite. Y're on your own for now. -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com # http://www.LearnByDestroying.com AE6KS |
#4
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Help with slim jim nec model
On Sep 24, 8:13*pm, Jeff Liebermann wrote:
On Wed, 24 Sep 2008 19:34:29 -0700, Jeff Liebermann wrote: It just keeps saying each line in that formula has a syntax error. Hmm. I broke down and read the documentation. * * File - Import Card Deck Load the Jpole.NEC file. *It shows up correctly in the "card view" but fails to appear in the "element inspector" and "spreadsheet view". When I try to run it anyway, it complains with: "NEC-2 error. *Possible wire element that touches z=0". No clue which card (line) it hates. Thanks for all the effort... With the exception of the app quitting, I had all the exact same things happen. I could run XP on here, but it's not worth it just for this. Seems like starting from scratch may be the only way to go with this app. I'll keep at it. |
#5
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Help with slim jim nec model
Well, I've gotten a little farther... If Jeff or anybody that has
CoCoaNEC wants to take a look at this file, that would be great. http://home.earthlink.net/~davepd/nec/ It's supposed to be a VHF log. I used an example file for an HF log to compare it with and I think I have all the geometry for it right. But it still doesn't run right. I know for a fact this antenna works in the real world. Looking at the example log file, they only had the smallest front element fed, which doesn't seem right to me, but that's how I did mine. Maybe somebody has an idea how to feed all the elements properly. The biggest problem is that the elevation pattern is extremely spiked and the SWR is off the scale. Not sure what I'm doing wrong. On the slim-jim one... I have the basic wire shape, but I can't figure out how to break the element in the right place on the stub side. Dave |
#6
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Has this problem been resolved as of this date?
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#7
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Quote:
I use 4nec2 it's free and more powerful than any other modeling program I've found pretty user friendly to. http://ghz24.freeshell.org/antenna/models/elevenmeter/ There are other antennas in the parent folder. The link to your model is down if you send it to me or post it I'll take a look. Here is a pretty nice LPDA I can't take credit for it though. It demonstrates proper feeding of an LPDA CM 8 ELEMENT LPDA by "old sparks" CM 470-810 MHz CE GW 1 21 0 -0.158 0 0 0.158 0 0.00081 GW 2 21 0.055 -0.141 0 0.055 0.141 0 0.00081 GW 3 19 0.104 -0.126 0 0.104 0.126 0 0.00081 GW 4 17 0.147 -0.113 0 0.147 0.113 0 0.00081 GW 5 17 0.186 -0.101 0 0.186 0.101 0 0.00081 GW 6 15 0.221 -0.090 0 0.221 0.090 0 0.00081 GW 7 15 0.252 -0.080 0 0.252 0.080 0 0.00081 GW 8 13 0.280 -0.072 0 0.280 0.072 0 0.00081 GE 0 0 0. EX 0 8 7 00 1. 0. FR 0, 96, 0,0, 470, 5 PT -1 TL 1 11 2 11 -125 0. 0. 0. 0. 0. TL 2 11 3 10 -125 0. 0. 0. 0. 0. TL 3 10 4 9 -125 0. 0. 0. 0. 0. TL 4 9 5 9 -125 0. 0. 0. 0. 0. TL 5 9 6 8 -125 0. 0. 0. 0. 0. TL 6 8 7 8 -125 0. 0. 0. 0. 0. TL 7 8 8 7 -125 0. 0. 0. 0. 0. RP 0 1 10 1510 90. 0. 0. 20. 0. 0. EN Last edited by ghz24 : April 17th 13 at 06:04 AM |
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