Fw: [cwops] 160 m FCP at N3JT

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David Tanks

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Dec 18, 2025, 4:17:29 PM12/18/25

to valleyhams

160 meter antenna with the FCP (Folded Counter-Poise). Instead of laying

out radials in/on ground, put up 2 of these about 8 feet or so above ground.

David AD4TJ

----- Forwarded Message -----

From: Tim Duffy K3LR <k3...@k3lr.com>

To: 'N3JT Jim #1' <n3...@cwops.org>; 'CW Ops' <cw...@groups.io>

Sent: Friday, December 12, 2025 at 10:03:14 AM EST

Subject: Re: [cwops] 160 m FCP at N3JT

Here is a great presentation by K2AV about the FCP.

https://www.k3lr.com/Dayton/Dayton2024/k2av.pdf

Tim K3LR

From: ma...@cwops.groups.io [mailto:ma...@cwops.groups.io] On Behalf Of N3JT Jim #1
Sent: Friday, December 12, 2025 9:56 AM
To: 'CW Ops'
Subject: [cwops] 160 m FCP at N3JT

I used a vertical loop strung among the various trees in my yard for some years but for the most part it seemed to do no more than warm the grass, whether fed in a corner, on the side or the bottom.

Then I came across K2AV’s folded counterpoise (FCP). It takes some work to build it given the elevated folded-radials are run through drilled 8-inch lengths of PVC (for spacing, separation). The “L” portion goes into a tulip poplar about 60 feet, then over the house toward the ground. The two folded radials stretch horizontally about 33 feet in each direction, if I recall correctly, and they are about 8 feet above ground. The matching/isolation box is specified in the K2AV article. www.k2av.com

The antenna works vastly better than the loop, though its bandwidth limitation restricts me to below 1850 kHz.

Jim, N3JT

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