I've heard/read that when laying radials on the ground there's really not much benefit to making the radial length any longer then the height of your antenna. So... if I'm using a ground mounted hus
Gary, you really need to read an article written by Al Christman, K3LC. Just look him up on Google under his article name: Maximum Gain Radial Ground Systems for Vertical Antennas. It was originally
Here is the PDF link: http://www.ncjweb.com/k3lcmaxgainradials.pdf Gary, you really need to read... _______________________________________________ _______________________________________________ Tow
N6LF has also published some excellent work on radial systems. It's on his website. Google to find it. 73, Jim K9YC _______________________________________________ ___________________________________
What is missing for me on this article is at what take-off angle is the increased efficiency realized? I suspect the smaller radial systems raise the angle of radiation slightly or maybe not so sligh
Dave, It seems to me that the takeoff angle is going to be primarily determined by the characteristics of the ground outside the radial field. For example, to get low takeoff angles, requires reflect
Correct on all counts. Radials change EFFICIENCY. They have no effect on the shape of the vertical pattern. 73, Jim K9YC _______________________________________________ ______________________________
--Original Message-- Indeed.. flood your neighbor's yard with salt water... and their length. There are points of diminishing returns, though. The rule of thumbs: 1) radials as long as the antenna is
ON4UN's Low Band DXing book has an excellent section about radial length. __________________________ Michael Murphy - KD8OK kd8ok@yahoo.com __________________________ I've heard/read that when layi
The antenna is surrounded by a salt-marsh...I watched the impedance of the 1/4 vertical drop each time I added four 1/4wave radials till I got to 48 of them...then no more change. I left it at that a
I recently put up a Hy-Gain Hy-Tower with 90, 70 foot radials stapled to the ground. I got everything from DX Engineering....6000 feet of wire, staples, radial plate and the balun. Much of this was a
I have been using a homebrew version of the Hygain Hytower with great results on 75,40 & 20. I have 80 ground radial of varying lengths from 30 to 150' long and I feed it with a 175' run of LMR900. I
Wow.... it talks about 8,000 to 16,000 feet of wire as the radial bed. That is a lot of wire. More than 40,- 25-foot radials the usual ham puts down. == Richards - K8JHR == __________________________
My 40m, 3-el vertical array has 60 34' radials under each vertical. My 80m 3-el vertical array [to be erected SOON] will have 60 75' radials under each vertical. You do the math. Don N8DE ___________
I remember reading the K3LC paper when it came out. He did a good job with his research, modeling and plots and added yet another way of looking at the ground system picture. On thinking about it som