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 may be a factor.
My ground rods are typically 3-5 feet, and water table is usually a few inches
deep or less.
73/Jon AA1K
Sent from my iPhone
> On Nov 15, 2016, at 9:20 AM, Herbert Schoenbohm <herbs@vitelcom.net> wrote:
>
> 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 continuity. It
> measures about 40 ohms wire to wire, this is done when I notice any
> performance change of the antenna. Now come the next test that baffles me
> completely. When I measure from either wire to my ground rods alone, to see
> what the return resistance is, I get reading in the vicinity of 20K across
> the 900 foot run. I understand that if the reading was very low it would
> defeat the whole Beverage principle. But is 20K Ohms reasonable, very good,
> or marginal? I use three foot foot rods at either end and when I pull one
> out yesterday before moving it the bottom 1/4 was moist and muddy. That
> Southern end of several reversible Beverages is located about 100 feet or
> less from a sal
t marsh or salt pond. I also have to such antennas made up of ladder line a
DX Engineering components. They all appear to be working well even though
large grass has reach and covered portion of some of them.
>
> But my question is what is a reasonable or good return ground resistance for
> a 600' or 900' Beverage. I haven't found any sources of information expect
> the saying that the higher Resistance the better. Is this correct?
>
> Herb Schoenbohm, KV4FZ
>
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|