Author: olinger at bellsouth.net (Guy Olinger, K2AV)
Date: Wed Apr 30 11:45:02 2003
We have found, in putting up an 8 element wire beam for 20M, that the ground is not inconsequential in the tuning. The thing is up at 85 feet (for reasons won't get into at the moment). But it was ne
Author: Guy Olinger, K2AV" <k2av@contesting.com (Guy Olinger, K2AV)
Date: Thu, 7 Oct 1999 01:22:10 -0400
With the gracious help and patience of W4AN and AD1C, I have taken over the admin duties for the Antennaware list-server, which I am happy to do. It will not go QRT. As you were... - - . . . . . . -
I have found I can't directly measure characteristics of the ground itself with what I own so I could make a model give an absolutely accurate gain level. BUT... If you are comparing two different co
Speaking about this? http://www.kintronic.com/site/techpapers/KTL_NAB_Paper.pdf -- Original Message -- From: "Joe Reisert" <W1JR@arrl.net> To: <antennaware@contesting.com> Sent: Wednesday, December 2
Many antenna programs have a method for placing a simple transmission line in the model. EZNEC, for instance will allow you to define a very short wire (like one inch) place it just about anywhere at
With 1500 watts on the antenna, .39 db is a loss of 129 watts. If the feed Z is 35 ohms, the feed current is 6.54 amps. Then the effective series loss at the feed is 3 ohms. If the feed Z goes down,
What else is in the vicinity (within 10 meters) that is metallic? As an aside, there is a lot of anecdotal stuff that points to models creating numbers that come out low when doing things with wire.
Without perhaps explaining underlying principles in quantum mechanics, the same thing happens with sound waves and light waves, and tsunami waves, for that matter. You may be attempting to equate rad
If you are using EZNEC and have the wire structure for the flags, setting phase is easy. 1) model each flag with a source record (the two sources will be assumed to be fed in parallel). 2) on the Sou
Hi, Ian, A license is not necessarily transferable. The versions I have of Brian's stuff are not transferable. They are the commercial (pro) versions, licensed I might add at commercial prices. The r
Models the same as any yagi type antenna. Just specify the elements, the feedpoint, and run it. What is really interesting is the non-intuitive current distributions you get in those types of antenna
Are the designs and claimed properties published? Where can I look them up? Guy K2AV Scanned for viruses by Blue Coat http://www.WinProxy.com/ _______________________________________________ Antennaw
Brian quit selling his software because of software piracy. This included hams posting his software on web pages for download. There are other things that happened to him that I won't dignify by repe
Posted on behalf of F3WT Scanned for viruses by Blue Coat http://www.WinProxy.com/ _______________________________________________ Antennaware mailing list Antennaware@contesting.com http://lists.con
Modeling a single or 2 element quad and a dipole and 2 element yagi in free space shows the "why" of the difference. In the vertical plane bisecting the elements, a quad element squeezes the vertical
Since you didn't mention switching each element, what occurs to me, given your two dips in resonance, is that you have in effect a pair of two element beams, a reflector beam on the low end and a dir
The pattern for either band resembles a water lily, many small lobes at various elevations around the entire compass, with more power at higher angles. Low SWR on 24 and 28 may indicate loss in the s
I've gotten to the point where I model ALL conductors in the vicinity, including coax shields, towers and metallic guys, with appropriate lumped loads where baluns are used, etc. This would include a
What I have never seen documented is actual measurements of far-field sky-wave changing with numbers of radials, along with the corresponding measurements at the ground. Sky-wave has always been by i