> Hi Jim … thanks for the info. Rudy’s latest method is the one I was
> planning to employ. Brian, K6STI also mentioned Rudy’s method. Good
> consensus on which method to use!
>
> Yes, all other elements were either de tuned or on the ground. I have
> checked each vertical one at a time (with
Grant, that higher Rr is the path I took as well.
My 160m antenna is a bit longer than 1/4wl - trimmed in length so that
the resistivity component of Z was 50 ohms. It's got Xl of course, so I
use a series C bread slicer at the tower base to to cancel the Xl.
My thought back then was that
Sounds like a great project.
Isn't the reality that conductors (radials) in or near lossy mediums
(earth, even salt water) have loss? And that the near field extends
beyond the 1/4wl of the radials? The coupling among elements might be
the reason 4:1 matching was used.
So while more &
Very interesting and timely discussions on radials and ground conductivity.
I’m currently rebuilding an 80M broadside array (with shortened, top loaded
elements) in SW Utah that I’ve modeled at 12 ohms impedance. The current
antenna was tested and the impedance measured was 25 ohms. Each element
