Another possibility for a compact counterpoise is what N6BT calls an "open ring" as part of his VOR (Vertical, Open Ring) concept. It's basically a horizontal, elevated, single turn 1/4 wavelength length of wire wrapped around the base of the vertical ... one end open and the other end running to the feedpoint at the base of the vertical at the center of the counterpoise loop. Mechanically, if the lines holding up the vertical are non-conductive, spaced and positioned properly, the counterpoise wire can be supported above ground by the lines. I've modeled several antennas with it (including versions where the counterpoise is comprised of two wires spaced several inches apart for better bandwidth) and the concept looks viable.
N6BT wrote an article on it in an issue of the NCJ about 18 months ago if anyone wants more details.
73, Dave AB7E On 8/28/2020 4:58 PM, James Bennett via Elecraft wrote:
For those of you who have limited real estate, like I do, and have HOA/CC&R issues, AND want to get on 160 meters, you might want to do some reading on the Folded CounterPoise (FCP). Do a Google search and you’ll uncover several hits and links to this unusual and workable compromise “radial” system. I live on a small California city lot and am not allowed towers, beams, etc. I do have several redwoods on the property that allow me to string thin, stealthy wires. With a large patio and an in-ground pool, there is absolutely no place for conventional 160 meter radials.I came across the FCP several years ago. Built one for an 80 meter Inverted L and another for a 160 meter Inverted L. Both work very well - they are mounted on the upper part of the fences around our property. One hundred percent not seen outside of our property. The antenna wire is nearly impossible to see. Can I easily get DXCC on 160 meters? Heck no. But I did complete WAS and have about 25 countries (all CW) confirmed on Top Band. If you have limited property and still want to operate 160, take a look at the FCP. Jim / W6JHB
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