Yes, Mark, N5OT go back a long way, 80's or so.
At my QTH, Arizona high desert 4800ft, the soil is very non-conductive -
typically dry shale and small rocks, it's called Caleche. We have very
little rain, about 10" - 12" per year. Humidity very seldom goes above 30%,
and temps in the summer are
N6LF Rudy's web site and associated QEX series has empirical data to
answer all of these questions regarding the number and length of on
ground radials.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
On 12/10/20 11:14 AM, Mark - N5OT wrote:
Yeah. I don't claim to be a radial expert
Especially if you have elevated radials you will need a choke otherwise
the coax and your shack will become part of the ground plane. . In my
case I have a choke ( for common mode currents) and UNUN to match the 25
ohm impedance of the antenna to 50 ohms. In some installations the
common
On 12/10/2020 4:33 AM, Rob Atkinson wrote:
I've never understood what is gained by using a balun at the feedpoint
in this application. The feedline is unbalanced as is the load.
What's the point of a balun.
That's the problem with the word "balun." A CHOKE is needed at the
feedpoint so that
Yeah. I don't claim to be a radial expert but I do claim to have a lot
of experience working other stations on 160 meters.
My buddy W9RE told me on a DXpedition once that he built a dipole laying
on the ground and it resonated on 160 when the wires were about 80 feet
long.
Ray, with
I heard you Roger but not strong enough to call.
Wes N7WS
On 12/10/2020 4:08 AM, Roger Kennedy wrote:
Great to hear lots of people on the band last night, and Conditions were
pretty good !
The only strange thing was that Propagation seemed a bit one-way - I was
getting some amazing Reports,
>
> To model radials, we must use Real High Accuracy Ground, with NO connection
> to Ground. Read the EZNEC manual
Yes! That is what I need to change. Thank you!
Solution:
I was connecting the radials to ground using EZNEC. I need to create the
radials just above ground.
Page 90 of the User
IMHO, for that number, on-the-ground radials do not need to be anywhere near
that long. Personally, I subscribe to the same-length-as-the-vertical guideline.
My inverted-L is 55 feet of vertical tubing plus the horizontal wire. My
insulated, on the ground radials are 55.5 feet (9 radials out
I've never understood what is gained by using a balun at the feedpoint
in this application. The feedline is unbalanced as is the load.
What's the point of a balun. The wild variations in R and X over the
range of the band will likely result in heat and loss at the balun.
If the point is to
Great to hear lots of people on the band last night, and Conditions were
pretty good !
The only strange thing was that Propagation seemed a bit one-way - I was
getting some amazing Reports, whereas most signals with me were weaker. (and
this wasn't just ME - I noticed the same with other EU
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