I have some 6ft wide chicken wire I can roll out on top of my existing radial field for 160. Does anyone have an idea what this might do? W0MU _________________ Topband Reflector Archives - http://w
When I had a 2 acre 80 meter 4 sqr raxial field up in Wyoming, this was strongly discouraged due to cancellation of currents, and went with the traditional 120 1/4 wave radials using a copper busline
Author: Mike DeChristopher <mfdechristopher@gmail.com>
Date: Mon, 29 Jan 2018 09:29:16 -0500
Rob Sherwood did some experiments with groundscreen and radials. You can see his slideshow here: http://slideplayer.com/slide/5717782/ I'm planning something similar at my new QTH but still trying to
My experience it helped a lot on top of my minimal 160 radial field by adding much wire square footage to the ground radials. It might not add much improvement to a very extensive 160 radial field ho
The SWR increase is a good thing as it shows deminishing ground losses exposing the true mismatch of the 50 ohm coax to the impedance of the vertical. So with a limited radial field, the mesh seemed
Why would bonding the added matting be required if it is laid over or beneath an existing radial field? It reduces ground losses regardless. Peter _________________ Topband Reflector Archives - http:
Peter: Is this a question or what you are saying is a know fact? I am very interested in this outcome since I will a installing a TX 4SQ system where some existing ground radials. Over time, I have h
Hi guys These are interesting question about ground or should I say "ground" . The answer for both question is the same. First we need to clearly understand what ground means, here some basic stuff.
For simulating a solid conducting plate in NEC with wires, Roy Lewallen (EZNEC author) advises 0.1 wavelength on a side squares of wires. That would be 16m for topband. Since adding the mesh is a sea
Today's Topics: 1. Re: Adding chicken wire or mesh on top of radial field (Peter Bertini) 2. Re: Adding chicken wire or mesh on top of radial field (Raymond Benny) 3. Re: Adding chicken wire or mesh
It is well known by DXpeditioners and an EZNEC analysis demonstrates that verticals within 1 wavelength of the sea have greatly enhanced gain at low elevation angles in the seaward direction. There i
<<There is no need for the antenna to be over water for that benefit. >> Hi Grant I don't know how many antennas do you install, I mean yourself. We all respect this concept is just wrong. 73's JC __
for permanent installation it's a waste of time because thin wire steel mesh (chicken fence mesh) will rust away in most ground in a short time. Recommend copper mesh but professionally it only seems
JC, Have you read the papers I cited? Looked at numerous reports from DXpeditions and several antenna experts re the performance of verticals NEAR salt water? google "vertical antenna near salt water
Another choice, and one more durable than the zinc-dipped steel of chicken fencing, and probably less expensive than copper mesh, is rabbit/deer fencing. This is available in different gauges and dif
The vertical near the sea will benefit from in-phase reflection (which is additive) of the vertically polarized radiation. That is probably worth 3 to 6 dB, depending on the angle, etc. Ground losses
Some field experiment results from 2016 Location: large farm field Antenna: Inverted L, using two 21m masts Note: this theoretically puts Rs at around 18 Ohm Ground: - Checken mesh: 6 pieces 8x1m cro
Quite late in response, partly done much earlier. Sometimes I have time, and sometimes I have a house and a spouse. Peter's original question in this thread was why a radial and mesh mix in a counter
Assuming that copper wire mesh isnt readily available for the screen that leaves galvanized chicken wire mesh fence/netting or perhaps galvanized welded wire fencing. Would galvainzed welded wire fen
I think the best vertical installations were done by old radio engineers. No modeling programs, but tedious solid measurements reflecting reality. What I saw at WOO - Long Lines AT&T station is perh