It seems to me that I have seen stuff like this, but it was never referred to in your terms. It is an old idea, back into vacuum tubes, as mentioned. The devil has always been in the details, and whe
Hi again, George. With respect to the theory part...to finish up on my earlier post. The battle with making a vertical work well is fighting off loss. The classic multi-band maxi-loss vertical consis
Try a postal service mail to K6STI's qrz.com qth. You may be able to purchase a copy of YO (yagi optimizer) from him. There have been rumors from time to time that he will respond mail only. 73, Guy.
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
Well, good. Any idea where I might be able to dig up that document? Or where to start? I remember listening to WHO in Columbus, Ohio as an eleven-year old with a 5 tube radio after everyone else asle
I have the PRO/NEC4 license (which cost me some change) and need the heavyweight often enough (mostly for buried wires). Though it might be my advancing age (and a few other things my wife might tell
Hi, Andy. Thanks. However, attachments do not make it through the reflector. Please embed the link url in the text proper and resend. 73, Guy. _______________________________________________ Antennaw
I was going to let this one go, but after sleeping on it for a week (?), the subject and commentary seemed to be one of those recurring persistent semi-myths that stick around and unfortunately influ
Author: Guy Olinger, K2AV" <k2av@qsl.net (Guy Olinger, K2AV)
Date: Sat, 2 Jan 1999 18:19:17 -0500
Hi again. The difference between ordinary earth and a concrete rebar roof could easily account for the difference you observe. This is so, particularly, if the roof's connection with conducting verti
Author: Guy Olinger, K2AV" <k2av@qsl.net (Guy Olinger, K2AV)
Date: Thu, 31 Dec 1998 22:09:19 -0500
Hi, You certainly will have to deal with the realities of the building in modeling the antennas up there. You haven't mentioned the composition of the roof. If it is metal, or has relatively dense me
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
Getting into the calculus level of explaining radiation at this point. Also at the point where ordinary conversational meanings of words diverge from "specialty" meanings, and technical conversations
[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
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
Author: olinger at bellsouth.net (Guy Olinger, K2AV)
Date: Mon Jun 2 14:56:27 2003
At the end of a string of posts with Pete, N4ZR, we find ourselves down in the deep dodo of a stub's actual behavior vs model or conceptual device behavior. The discussion originated around evaluatin
Author: olinger at bellsouth.net (Guy Olinger, K2AV)
Date: Thu Apr 17 13:44:10 2003
In an urban setting, with so much clutter on the ground, a useful assumption for conservative estimating is that the energy radiating from the antenna at an angle below the horizon will be mostly los