[TowerTalk] Counterpoise / raised ground radial adjustment method

[Larry Loen]

I don't know about 160, but don't disparage 30 foot radials for 80 and 40
(and 30) on an HF2V in particular.

I was restricted to that, put down 64 radials, and had great result in
Minnesota (average soil). ON4UN says that radials on the ground detune
anyway and the velocity factor is an issue as well.  So, you're not as far
off as you may think.

I didn't even have the 30 meter coil, but I got the HF2V to load and worked
lots of DX and I don't mean just France.  On 80, I got DXCC, including Zone
23 (often considered the hardest) in a single season.



Larry WO7R



On Mon, Aug 26, 2013 at 3:10 PM, Jon Suehiro <nn5t at attglobal.net> wrote:

> I have obtained HF2V with 160 and 30 meter option after moving to this new
> location and ready to put up in the city lot.
>
> If buried radials, the max length I can stretch is probably 30 feet in
> limited direction. This is not effective enough to cover the low bands.
>
> So planning to place the zigzag wires along inside the wooden fence. I have
> approx 40' long x 8' high surface on one side and 30' long x 8' high on the
> other side.
>
> (Since not much concern for direct lightening hit so no plan to place 8'
> ground rod(s) at the feeding point unless count as a good addition to RF
> ground radial system.)
>
> Maybe 2' tall mast for HF2V and 2 each radials for each band 160/80/40/30.
> Planning to stretch the ground radial wires in the height of 2~8' (still in
> linear loading).
>
> I don't have any idea how it resonates. Currently planning to place 2 wires
> on each band as dipole and check the resonate frequency by antenna analyzer
> (AIM4170) but ignoring the impedance.
>
> 1. Any merit to add 8' ground rod(s) in addition to the ground radials ?
> 2. Do I need to be sensitive to each ground wire resonate frequency to
> exact
> 1/4 wave length, or (cut the wires to 1/4 wave length but forget about the
> actual resonate frequency and) final matching condition must be adjusted at
> HF2V tuning process ?
> 3. Is there any additional merit to add any ground sheet even the surface
> can be limited to such 15x 30' to low band vertical (mix of buried and
> raised radial systems) ?
>
> Thanks for your advice.
>
> 73 de Jon Suehiro NN5T
>
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