I got the idea of the mesh at work from a Tech Class engineer but dont
remember him referencing HRM. This was in the mid 80's and I was complaining
about the poor performance of a shunt fed 100' tower with 10/15/20 4el yagis
for top loading and 60 radials of 60-130' or so.
Since chicken wire
I wonder.Is there is a simple way to compare the field strength of an
FCP with my current NON dense and uniform ground system, and draw
reasonably accurate conclusions about efficiency improvements
Sure. You can probably determine ground wave changes in a vertically
polarized radiator
I thought about this, and thought I better add more. I didn't mean to imply
someone has to have a selective level indicating instrument to measure
things. I was only pointing out what I typically do now.
I looked on eBay and I see the thing I bought in excellent shape for maybe
100 dollars or
I am going to need to run a coaxial cable from a receiving system about 900
ft away from the shack. My first thought was flooded RG6, Commscope
F660BEF, which would appear to have about 4 db of loss but then thought
possibly some flooded RG11, MaxPipe S1D60PN-O-R1K, might be a little
better.
I have matched quite a few Tee top verticals - and do it as follows...
Put an antenna analyzer at the feedpoint and measure what you have at the
QRG you want - probably 1.830?
Put the numbers into the TLW program and let it design an L network for you.
Wind the L and use transmit quality
On 9/25/2012 9:46 AM, Hal Kennedy wrote:
I can supply a
coil winding Excel spreadsheet off the list to help get the coil wound.
The nearly 100 year old formulas in the Handbook for winding coils are
spot on. I've plugged them into a spreadsheet to crunch the numbers for
me, and measurements
Rob Sherwood was once a strong advocate of chicken wire and has run many tests.
Perhaps he might chime in here with some comments.
Howard K2HK
From: z...@jeremy.mv.com
To: j...@audiosystemsgroup.com; topband@contesting.com
Date: Mon, 24 Sep 2012 22:07:03 -0400
Subject: Re: Topband:
Hi Guys,
I will be installing my new Hi-Z 2-3 RX antenna this coming weekend. I
live on a small quarter acre lot in Maryland so I expect a few
challenges and compromises. I would like to hear from other small lot
Hi-Z owners so I may be able to avoid or workaround any issues and
manage my
Hi Joe,
I don't have any advice. Only some words of encouragement regarding compromise
installations, and that they can yield a substantial improvement.
I live on a small city lot, no more than a quarter acre. I have tried a dozen
receive antennas (K9AY, EWEs, coaxial loops, low dipoles,
On 9/25/2012 11:02 AM, Howard K2HK wrote:
Rob Sherwood was once a strong advocate of chicken wire and has run many tests.
Perhaps he might chime in here with some comments.
Rob is NC0B. I cited his work in my first post on this.
73, Jim K9YC
___
In a message dated 9/25/2012 2:38:58 P.M. Central Daylight Time,
j...@audiosystemsgroup.com writes:
On 9/25/2012 11:02 AM, Howard K2HK wrote:
Rob Sherwood was once a strong advocate of chicken wire and has run many
tests. Perhaps he might chime in here with some comments.
Rob is NC0B. I
I didn't mean to imply that chicken wire is as good as the rabbit wire. In fact
I had exactly that situation with chicken wire. Definitely agree that most
situations must be evaluated on their own merits and circumstances. I am aware
of Rob's call but just thought this might prompt him to
On 9/25/2012 5:38 PM, joe wrote:
Hi Guys,
I will be installing my new Hi-Z 2-3 RX antenna this coming weekend. I
live on a small quarter acre lot in Maryland so I expect a few
challenges and compromises. I would like to hear from other small lot
Hi-Z owners so I may be able to avoid or
Some rabbit wire sold here is coated which should solve some of the
corrosion problems but if they are laid side by side they probably would
require scraping of the coat and welding every five feet or so to
maintain radial field continuity, and then re-coating the welded joint.
Any difference
Just to note that Edmund Laport (once the Chief Engineer of RCA
International) did not support the use of ground screens in his textbook
RADIO ANTENNA ENGINEERING (page 121), citing eddy current losses around the
closed-loop circuits of such ground screens.
More common for AM broadcast
The results for the 16th annual Stew Perry Topband Distance Challenge are
now posted.
http://www.kkn.net/stew/
Don't forget the Stew Warm-up coming on October 20/21.
The next big Stew is on Dec 29/30th.
73 Tree N6TR
___
UR RST IS ... ... ..9 QSB QSB
16 matches
Mail list logo
