Ask to Justin G0KSC Before you shortchange yourself, take a look at Dan's website (ac6la.com) and see some of his work and perhaps consider adding his excellent AutoEZ adjunct to EZNEC and do your ow
Try Dick Reid, KK4OBI. Response from Justin has been slow lately. I asked for a tweak of one of his antennas - change in element size- over a month ago and have received nothing back, not even an ack
I can see most hams at states side do stick to Eznec, but there are a couple of free software same as good as Eznec; 4NEC2, very powerfull. Better than Eznec as you get automatic Optimizer module and
Hi all, For those interested in bent elements, there is a friend investigating them for a number of years, producing very good designs; http://dg7ybn.de/Bent_DE/Bent_DE.htm 73, Maximo _______________
Hi Brian, Is anywhere the information how the bent driver works? What I meant is to know how the bent driver gets those results, comparing with the straight driver. Just to learn. Thank you 73, Maxim
Open-Line is much cheaper and low loss. A couple of good baluns and job done. It is just one more option. 73, Maximo The question was actually not about feedline. However - what feedline is part of t
Hi Dick, I use HFTA sometimes. Fell free to ask. At same time, there is a website showing how to use it, including screenshots, different source for metadata and even some videos; http://www.ea1ddo.e
9 el. http://optibeam.net/index.php?article_id=79&clang=1 11 el. http://optibeam.net/index.php?article_id=80&clang=1 16 el. http://optibeam.net/index.php?article_id=81&clang=1<http://optibeam.net/ind
Don´t you like the Big Boy rotators? aka Prosistel https://www.arraysolutions.com/prosistel-general-info And the Array´s control? https://www.arraysolutions.com/Rotators/ra-s1 73, Maximo ____________
John, There are three options. 1.- Ground radials. Minimum about 30. Any lenght (random lenghts).. 2.- Elevated radial. Minimum 2 per band, best 4 per band. Exactly 1/4 Lambda (same size as a dipole)
I have done the Andrew official training, from 1/2 to 1 5/8 connectors, and I've spent some years working with those feeders. We have never used that installation tool. As John said, with basic tools
You need to see what X shows. When X=0 that is the resonance point. It is how you know if it is long or short, or just in place. After that, while X=0 (or around), it is when you check R. That is the
It is an interesting thing, because many Yagi have the dipole at DC ground, at the center support, part of the gamma-match system. I wonder if these Yagi suffer same rain noise. By the way, not every
Hi Wes, all, There are some more interesting devices; Deepace http://www.deepace.net/ This guys are a spin-off from an university in China. They have very fine models on catalog. I had the KC901V and
I think is good to be clear that is quite different a VNA to use on the top of a tower or field, than on the bench, than in a lab. You are talking about different things. All of them VNA but differen
Then, it could be related to the end of the elements capacitance. I guess a Yagi with folded dipole or LFA will be fine when rain ?? 73, Maximo Years ago I had a 10 meter dc grounded Yagi with gamma
Talking about software for VNAs, based on Touchstone, I can share this fine tool: VNA Tools https://www.metas.ch/metas/en/home/fabe/hochfrequenz/vna-tools.html It is free to use. 73, Maximo _________
Well, let's say that in most times one port VIA would be enough, to tune an antenna basically, and some other minor jobs. But some times you need to phase a stack of Yagis, or even a four-square vert
If the tower is insulated at bottom, you can get a vertical antenna. You just need to add some radials, better option are "elevated radials", and your remote tuner. 73, Maximo <http://foro.ea1ddo.es/
If length is limited, you can always add a wire from the top to any distance point. This way you will create an "Inverted L" antenna covering much lower bands. 73, Maximo <http://foro.ea1ddo.es/> If