I don't doubt that, but rock salt (NaCl) is NOT the best choice.
It does work at first. But it corrodes the rods. Eventually, the rod is
eaten away by the salt and becomes worthless.
73, Mike
www.w0btu.com
>> Whenever the signal dept. had a problem with the grounds for the
signal system on t
The following questions were sent to me in a private email, and I thought
it would be best to post the answers to this reflector so others can
benefit and correct me.
> Mike,
>
> Magnesium sulfate - Very interesting. I wonder how it compares with
copper sulfate?
To make a long story short, Epsom
Good answer, Greg. DC is certainly not the best way to measure an RF ground.
I wonder what the difference would be if we used 1.8 MHz instead of 100 Hz?
I thoroughly soak the earth around the rods here with Epsom salt (magnesium
sulfate). It *really* decreases the ground resistance! The differenc
; , "Topband"
Sent: Tuesday, November 15, 2016 9:28:08 PM
Subject: Re: Topband: Strange resistance between Beverage ground rods
Thanks to all that have given tips on this. I was using a Fluke 77 in
the low resistance automatic range and as Lee K7TJR pointed out even a
small induced v
Thanks to all that have given tips on this. I was using a Fluke 77 in
the low resistance automatic range and as Lee K7TJR pointed out even a
small induced voltage was enough to drive the resistance reading up to
20K Ohms. I made additional measurements with my Sperry DM-4100 and an
analog VO
True Yuri.
Yes, much of it- low in frequency. This is why we wind our isolated
antenna transformers to pass 160 meters and above,
with very low primary to secondary coupling capacity to minimize
passing of these frequencies.
73
Bruce-k1fz
On Tue, 15 Nov 2016 13:47:40 -0500 (EST), Yu
Don't forget that in the ground there are "travelling" Eddy currents,
being generated by all kinds od "services". The worst are in the areas
where trolley services, electric trains and other high power services
use ground as the other conductor or just being there. They can get so
bad that they
As I recall mine are typically in the hundreds of ohms or low thousands, never
as high as
20k, even on a 950 ft wire.
I do see large variations of these across my 12 acres, even significantly
different readings on each wire in a staggered phased pair.
We have two different soil types, which ma
Hello Herb and fellow Top Banders,
When I had Beverage antennas here I was never able to read the ground
resistance here as well. The reason it did not work here is there was actually
a small DC voltage difference between grounds apparently developed by galvanic
means or currents in the earth
Hi Herb,
I came across this problem when I first started using Beverages in 2008.
I have come to the conclusion that the DC resistance measurement is
corrupted by electrochemical effects between the grounds, ie potential
differences. I then changed to an AC measurement. I made a simple
100-or
I have reflection transformers at the end of every two wire Beverages
which I try to test by measuring the wires on the feed end. I remove the
transformer from the two wire WD1-A and check the resistance between the
two wires which tells me that through the reflection transformer I have
continu
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