Hi, I am in the process of fixing my 80 meter 4-square and have some questions regarding raised radials. 1) Since my 4 square is "cut" for 3.65 and the radials need to work on 3.5 as well as 3.8mhz,
You didn't mention the height of your radials... interaction with ground might affect their resonance. By the way, the length (and height) of elevated radials will affect the apparent resonant freque
The more radials there are the less important it is to tune them to a particular frequency. As was noted already the height is important if you are going to be picky. On my 4-square build last year I
It makes very little difference. What I did when I made elevated radial measurements is I tuned the radials to resonance by connecting them as dipoles. Then after they were tuned, I connected themm
Not true. With a small elevated ground system any path to earth reduces field strength. That's etched in stone, it isn't a guess. While the amount of loss varies can vary it always adds some loss. T
David, IF you take that view, you still want a choke on the phasing network end of the line to the verticals. You do not want radial current on the OUTSIDE of the coax (common mode current) upsetting
How can the current on the outside of the shield of the coax upset a phasing network that is in an all metal box? David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluste
I wasn't talking about ground losses, I was considering the effect of adding ferrites to the shield of the coax feeding the verticals. Given that the Feedpoint is raised, the radials are raised, and
At the very least currents on one feedline can couple to the other antennas (other ground systems) across the metal box. With elevated radials, the radials become part of the radiating system and cur
Just picture wire connecting bases of all verticals, connected at the phasing box. The best demonstration of the effect is the 3 vertical array fed by Stack-Match phasing unit, advertised for this p
Sounds like something wrong with that box to me. On my 4-square the feedpoints are all connected by radials, the feedlines all connect to the bases and the switchbox just like another radial... and i
Elevated radial systems do not have nearly the "sinking capability" as an infinite, perfectly conducting ground plane. In a perfect world, if the vertical was fed by coax from underneath an infinite
It has to do with configuration of 3 vertical array a StackMatch, using disconnected element as a parasitic, coax line turning that element into reflector, but connected shields messing up the curre
A StackMatch is not intended for this type of installation (K8UR parasitic array). This is like saying a hammer has something wrong with it since it needs to be modified to drive a screw. 73, Bob W5O
"StackMatch for Verticals User's Guide Thank you for your purchase of a WX0B StackMatch. Users Guide This WX0B StackMatch can be used for stacking two or three monoband verticals. It will give the u
Yuri, you're not reading the Stackmatch description carefully enough. The K8UR array is parasitic, and relies on a switchbox that disconnects all antennas except the one that is driven, and then uses
OK, I can't tell the difference between the hammer and a screwdriver, now I can't read :-) "The three antennas are set up in a delta pattern or triangular pattern, equidistant from each other. " Can