The real problem in the picture that you paint is that the break point for center loading is just that, a structural weakness for something as tall as 60-70 feet. The center loading is in the way for
Depends on whether your main goal is to work people easier, or it's an intellectual pastime. Frankly modeling and EZNEC are a great pastime what you do about the dirt. 73, Guy. ______________________
Four and Five. The impedance may change by raising the ends, but your problem on 15 makes me suspicious of lengths. Multiband antennas are very touchy. Some recommend a second G5RV, scaled with 40 me
If you have a single feed point, I or V is immaterial. SI or SV is used put a feedpoint at a wire junction, as in a Vee antenna. Mark the two connected points as SI or SV. When you have more than two
You must then remember that to get the results, you have to something specific to FORCE the desired current ratio and relative phase used in the model. V sources may not deliver the results for a giv
When I first started using modeling software, the temptation was to accept those results as real and I quickly succumbed. I came up with some models that showed excellent gain and put one up. I quick
I have all the scars and memories of wasted time that would prove otherwise. Take models as gospel, and it will get you sooner or later. Don't go investing any of my money in unverified models. With
Dennis, I'm also going to post this this reply on Antennaware reflector, with only the question quoted as it would seem to be of general interest and (unfortunately?) has a complex answer. ...snip...
Always model it. You might be the one that discovers THE CLUE to solving the ground radial problem. SOMEBODY has to stumble over it in the dark SOMETIME. Great minds hasn't worked. Need some plain ol
One other thing is that UHF and coax with a waterlogged shield do not get along well. When I was maintaining a repeater, we spent a lot of time renewing water seals. A bad seal and water in connector
An earlier post by K3BU got lost in the pile of spam posts submitted for checking by moderator. I just now caught it and passed it on. So it may be out of sequence. A ton of spam gets deleted by the
A couple of quick things. The model will be sensitive to ground type. Mininec ground or "perfect" ground will not work. Use high accuracy ground that matches your target location. Model your tower as
I'm probably not the only one...please define NIC. That comes up in my head as Network Interface Card. 73, Guy. _______________________________________________ Antennaware mailing list Antennaware@co
I'm trying to reconcile http://oem-shop.us/cheap_download_Ansoft_HFSS_9.1_(1_cd).html and http://www.gohoy.com/html/Finite%20Element%20Analysis%20engineering/20080415/11373.html after a minor Google
I have marveled at how many professionals are lurking in the weeds on this reflector. Just have to ask the right questions to wake 'em up. 73, Guy _______________________________________________ Ante
This was a hack on a subscriber's mail list. If it continues, I will unsubscribe the address. 73, Guy K2AV Admin. _______________________________________________ Antennaware mailing list Antennaware@
A really good presentation that I had not yet seen, particularly the TDR stuff. Very nice. 73, Guy _______________________________________________ Antennaware mailing list Antennaware@contesting.com
73, Guy. -- It has been quite a while since any change has been made to the calculation engine of VOACAP. Most of the changes have been to the GUI interface. The latest was just to download a newer S
Hi, David, "Official" models that include the traps are essentially non-existent. It is the traps that are the wild-card instead of the aluminum tubing size and length. To create an accurate model, t
EZNEC is not an optimizing modeler. So design iterations with the model are manually directed. HF yagis from a standing start are best done with YO. Which, alas, is not being marketed by Brian K6STI