The TLDetails transmission line utility program has been modified to include the effects of DC resistance and internal inductance as well as the usual skin effect resistance and external inductance.
AutoEZ is a new Excel application that works in conjunction with the EZNEC antenna modeling program. You can use variables to control diverse aspects of the model and then run multiple EZNEC test cas
I'm a "visual" type guy, so I modeled Jim's 80m dipole at heights above ground from 10 to 30 meters using three different soil conditions. Here's the picture-worth-a-thousand-words: http://ac6la.com/
Stacking and feeding horizontally polarized Yagis is one of the examples that was developed for the AutoEZ application. The first part of the example compares a single Yagi mounted at 1.5 WL above r
Not sure if Stan was addressing me or the original poster but it sounded like a fun exercise. I modeled two Yagis, each at 1.5 WL above real/average ground, separated horizontally by 1.5 WL as though
Although this topic has been beaten into the ground I'd like to post a clarification. Stan Stockton and I have exchanged a few private emails and I now see how I misinterpreted his remarks. Stan prop
This topic happens to be discussed in one of the examples in the AutoEZ User Guide. The illustration linked below shows how the pattern is degraded when the elements of a 4 square are incorrectly fed
AutoEZ is an Excel application that lets you automate the use of EZNEC. Version 2 is now available. Major changes are 1) an optimizer, 2) new "Create" dialog windows to easily build common antenna co
Recently I assisted an AutoEZ customer with a project involving LPDAs. Along the way I created a couple of model files that might be of interest to others. Model "LPDA by Tau+Sigma.weq" lets you crea
Hi Rudy, Not PSO, but you may wish to check out AutoEZ which is an Excel app that drives EZNEC. Its optimizer uses the Nelder-Mead simplex algorithm. One of the models used during beta testing was a
For those of you who have AutoEZ here's a step-by-step guide to modeling the Jim Brown "Pacificon pitch" ( http://k9yc.com/PacificonSmithChart.pdf ) 80m dipole. Paraphrasing, tune the antenna for 367
Here's a visual of the situation Steve describes. http://ac6la.com/adhoc/K9YCdipole11.png Dan, AC6LA http://ac6la.com _______________________________________________ _________________________________
As K9YC said, coax VF changes as the frequency changes. The TLDetails program allows you to plot VF vs Frequency for any of about a hundred different types of line, including Bury-Flex. Here's a samp
Putting aside for the moment the distinction between measuring and modeling, I wanted to investigate what VK3QI said about "DX angles" (in this case 10°) vs "zero" angle. First thing I did was create
Be sure to check out this url: http://www.arrl.org/antenna-modeling-for-beginners That's the ARRL support page for the book in question. In particular see sections "Clarification & Support" and "Erra
In some private emails resulting from the "Basic Antenna Modeling tutorial" thread, Bill mentioned that he was thinking about spending $20 to purchase the EZNEC equivalents of a package of NEC models
Occasionally I have posted various examples showing how AutoEZ can be used to address different modeling questions. Those examples are now available on the AutoEZ web page. See the "Collected Short E