If I read your posting correctly, your radials must be much less than 1/4 wave and they are above ground. Here at N9DX I'm using just four buried radials and four radials at 8 feet, but they are 1/4
In view of all the discussion on verticals and radials, I thought it would be useful to reproduce some of the radial data reported in the Brown, Lewis, and Epstein paper which Tom W8JI has cited. For
Author: John Kaufmann via Topband <topband@contesting.com>
Date: Fri, 3 Dec 2021 18:26:25 -0500
EZNEC is correct. Adding more radials, even long ones, in a specific direction won't preferentially favor the direction in which the radials are added. It will help raise the overall efficiency of th
Hi Jim, That simply makes the radiating part of the vertical taller and elevates feed point. Its known in professional antenna engineering circles as a sleeved monopole with elevated feed point. The
Not a simple , on size fits all answer What happens depends on the frequency you are talking about ( I assume 1.825 but if it is a multi band vertical ..then???) and how much above the ground pl
Hi Jeff, Micro arcing can be excited by just a few volts of RF. While micro arcing probably is n't a fire risk, micro arcing radiates low level phase noise on transmitted signals. This is can cause a
Hi Gabriel, These comments will be of little help as far as the technical info on the subject antenna and is a far cry from an excellently constructed antenna but it is very practical....in my opinio
Many hams --including myself-- have had very good results using only a few elevated radials. This question contains an answer with a NEC 4.2 plot comparing the efficiency of earth vs. elevated radial
About 20 years ago I did the DOG (dipole on ground) experiment) at my northern Indiana location. Many others have likely done their own DOG tests but my results were that the dipole needed to be shor
Mike, a different question than you asked, but if you have two trees or other supports at 65 feet or greater and more than 130ft apart, I think an 80M dipole strung between them will be a better all
I installed my buried radial system in 1983, using #12 bare soft-drawn copper and it is still in near-perfect condition. The radials were soldered to the common point at the base of the tower, a copp
New chicken wire is good but once the twisted sections start rusting there wont be good electrical connection. hats a good cause of noisy reception and IMD birdies from strong locals, BCB stations, e
I found a great source for radial wire at home Depot where they have 100' rolls of 14-2 packaged for under $40. Two conductors are insulated and one of course is not after the easy job of striping th
re elevated radials: For a thorough analysis of radials check out antennasbyn6lf.com for Rudy's work. Assuming farming happens, perhaps you can get them high enough to make the owner happy. Mine are
While probably too much for 40 radials, I have taken to using extra extension cords for temporary radials. They are bright orange so easy to see, connect together with cube taps or outlet strips, 100
Yeah, just a few elevated resonant radials can work wonders as you have discovered, Carl! And rock does get in the way of buried radials!! The models teach that elevated resonant radials should work
That's a lot of good information, Richard! Thanks for sharing! 73, Charlie, K4OTV The r-f loss at the operating frequency in a set of buried radials varies with the conductivity and permittivity of t
Yes. And the operative words there are "along its length" - very different from grounding at its end! The nastiest, and most difficult case to model and analyze is the case of "radials" laid on the g
Hi, Eddie Nicely done! Looks reasonably professional to me! At the very least, you've made a good effort to quantify your results in a meaningful and repeatable way, with decent tools. No need to tun
Eddie, LU2DKT, I read your post with great interest!...Great work there. I am very much interested in your findings & report. I wish to request if you can send to me, when you find a method. Addition