I have an accurate model of a JK801. At 145 ft, and at peak gain takeoff angle
of 25 deg, F/S = 9.8 dB. Gets better at lower angles, worse at higher.
EZNEC model sent to Jim in PM.
-Gary NA6O
> On Apr 13, 2026, at 9:00 AM, towertalk-request@contesting.com wrote:
>
> Date: Mon, 13 Apr 2026 07:20:25 -0700
> From: "jim.thom jim.thom@telus.net <mailto:jim.thom@telus.net>"
> <jim.thom@telus.net <mailto:jim.thom@telus.net>>
> To: towertalk@contesting.com <mailto:towertalk@contesting.com>
> Subject: [TowerTalk] Dumb question
>
>
> When a 1/2 sized loaded 75m rotary dipole (combo of Capacity hats part
> way out either side + a seco systems compressible coils at the
> feedpoint)..... what is the FS ratio... when modeled in free space ?? (
> 68' log ele...tip to tip)
>
> This is more academic than anything. Right now, I have no way to model
> that config.
>
> Jim VE7RF
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