When elevated radials are mentioned they are often full 90-degree radials. The low impedance presented by the radials makes decoupling the coaxial cable shield easy. The counterpoise current will div
The (80m) 4-square here went live the day of last CQWWSSB. It's "quickie" radials were raised, 4 per element, starting from ground level, going up at approx 45 degrees to 7-10 feet, and then sort of
Return-path: Dinsterdog@aol.com From: Dinsterdog@aol.com Full-name: Dinsterdog Message-ID: <d7513b47.24e2eb1e@aol.com> To: <topband@contesting.com> Date: Wed, 11 Aug 1999 11:05:02 EDT Subject: from N
Author: pa5mw--- via Topband <topband@contesting.com>
Date: Thu, 5 Mar 2020 21:13:56 +0100
Hi Gabriel, There is too many variables in your antenna setup to determine the expected impedance. I have built and measured several inverted L's with/without elevated radials and/or sloping top wire
All true, of course. Aside from the rocky condition of my lot, one of the main reasons that I rely on elevated radials is that I can model those antennas handily and I get good measurable results tha
Thanks for the comments and pointers. The land around the antenna is mixed grass and forested islands so on the groundradials would be partially buried and partially on the surface. Digging through
Thanks for all the feedback on how to get the radials over/under/through the wall. After playing with this for the past few weeks I realize no way to go under as test poundings on rods indicates the
Hello Guy and sorry for the very late reply, I should have given more detail on my, admittedly poor radial system. It is pretty sparse, consisting of only ~20 1/4 wavelength radials not very well dis
This past weekend I did some experimentation with Don, W4OC, (A very knowledgeable broadcast engineer) with elevated and ground mounted radials on my 160m shunt fed tower. W4OC's QTH is roughly 20 mi
To: <topband@contesting.com> Well, yes it is. We (other than you) have been discussing ground mounted 1/4 wave tall vertical antennas either with elevated or with ground mounted radial systems of var
I guess I should have added "useful to me." At my location, I wouldn't dream of having elevated radials less than 6 feet above ground. Running them through the cactus and bushes could be just as di
Thanks Dan, very excellent stuff (as you always do!!!). Your observation of the large shift in currents with small changes in length is exactly the problem I am concerned with. And the N6LF data show
1) If you have the space and work hours and money isn't an issue - go with 120 1/4 wave buried radials. That is a myth that stems from the FCC not requiring a ground system proof of performance when
Charlie, Yeah I see what you mean they each have a different take off angle lobe. I will run a run a plot with EZNEC of each and see what they show. I have changed/ started a new subject title for th
I am very interested in the comparison. I am almost daily on 40m SSB at about 15:00 for LP with a couple of friends. The San Diego area is also good for SP a bit later. RBNs in Europe most of the tim
An interesting -- and very easy to overlook! -- reference in ON4UN's latest lowband bible in the matter of groundradials... Specifically, wire laid atop the ground may be considered to have a veloci
To: <topband@contesting.com> Everything works better over perfect ground. Strategies which are designed to overcome losses caused by nearfield interactions with imperfect ground are unnecessary when
Moved onto 3 rural acres about 14 yrs ago. Only had one (15') tree on the whole property, AND I had sold my yagis and tower about five years earlier. So I went with monoband GPs on 40-30-20-17-10. Al
Actually WLW, 700, Cincinnati reduced their tower height to raise their angle so that the "first hop" hit the Columbus market, about 100 miles away. I believe this was after their 500KW era. BTW, th
On 1/4/2024 9:53 PM, Robin wrote: Milt Jensen, N5IA (SK) constructed his original (circa 1990s) 160M station TX antenna based on a similar design I encouraged him use. He built a 180 ft tower with a