On 4/22/20 8:00 AM, Grant Saviers wrote: Good point. Modeling Yagis and optimizing with Auto-EZ is instructive in how much one change changes a lot else. Watching the automatic optimizer try to fin
Who is the "they" in this post? I looked all through this post and quoted stuff to find "them." If you're referring to mfrs, what makes you think they use NEC for design? There are multiple modeling
Who is the "they" in this post? I looked all through this post and quoted stuff to find "them." If you're referring to mfrs, what makes you think they use NEC for design? There are multiple modeling
I agree. When I bought my Optibeam OB16-3 and OB2-40, Tom (DF2BO) didn't send me the EZNEC files but he did send me the resulting plots for gain and SWR. The manual also specified the element lengt
When I see this thread, it brings back memories. Doing this accurately is far more difficult than one would think. If you come away with a "how hard can it be" - then you are probably not consideri
Author: k7lxc--- via TowerTalk <towertalk@contesting.com>
Date: Thu, 23 Apr 2020 14:08:07 +0000 (UTC)
When I was the Natl Sales Manager for Hy-Gain/Telex in the 90's, I met the guy that designed the TH-6. Hy-Gain had a nice antenna range and he said it took them 4 hours per iteration so I guess
I use insulated elements (DX Engineering element brackets) and avoid short sections in my EZNEC models. The Yagi SWR curves basically match and I trust the model. Modeling is certainly quicker and be
Tom, Yes. there is a MUCH simpler way to do this without climbing the tower. I have tuned a number of hombrew Yagis and vertical parasitic arrays, and used to think I needed to isolate the driver, th
On 4/23/2020 7:08 AM, k7lxc-- via TowerTalk wrote: When I was the Natl Sales Manager for Hy-Gain/Telex in the 90's, I met the guy that designed the TH-6. Hy-Gain had a nice antenna range and he said
I always wondered about that. That was way before computer modeling, of course. Even today, modeling traps is very difficult, hence all the interleaved tribanders. 73, Scott K9MA On 4/23/2020 09:08,
Author: Brian Rehmer via TowerTalk <towertalk@contesting.com>
Date: Thu, 23 Apr 2020 23:24:14 +0000 (UTC)
So, are there any nec models for Hygain Yagis? I am interested in adding rotary dipole for 18 and 24 MHz with my th5dx. BrianKc4kk Thanks, Brian I always wondered about that. That was way before com
See http://www.arrl.org/antenna-modeling-files although the TH5DX is not listed. AutoEZ can read .yag files, see https://ac6la.com/aeadvanced.html#Part9a AutoEZ general information: https://ac6la.com
TTersTo all who participated in this thread: I received some valuable information from several contributors and learned a lot. In fact, there were so many that it will take too long to thank all pers