[Tom's post was a non-subscriber post, if you respond you will need to reply to him direct as well as to the list.] Tom, I have never heard of an interlacing solution involving an XA. There probably
With respect to the folded dipole... For 160m stations at any real distance the 33m vertical and 40 radials will vastly outperform an inverted vee at only ~ 1/8 wave height. W8JI has tested a dipole
One interesting thing that shows up if you model it, assuming the vee feedpoint is directly over the center of the radials, and assuming the radials are in good condition... If you ground the feedlin
I hate to allow that 3% figure to stand without some challenge. And Roy is not the source of the NEC-4 corrections, those are from the collective authors of the licensed NEC-4, which the professional
I have inserted a NEC file of a antenna that has me puzzled as to why the gain it gets. Seems quite too good to be true. Will send a .EZ file to anyone who requests it. Would appreciate it if the eru
LB, Thank you. At some point my brain just shut off and would not see anything else. Yes, the cut at the top is intentional. Will respace the ground mat wires and see if gain suddenly ramps off. Same
Wow. This belongs in a book and on a web page somewhere. Great post. although appropriate extensive does not ground NOT a can be the observed publicize experience model -- connections to Accuracy" fo
Don't know how this got through, but the subscriber has been disabled, and the URL might point to a virus. Sorry, K2AV (admin). To: <antennaware@contesting.com>
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
I *was* referring to the transmission line feature in EZNEC, not a literal modeling of the transmission line wires. [Thank you Ulrich, long time no hear] For modeling linear loading, or placing wire
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