DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :content-type:content-transfer-encoding;
        b=ujdIkJQriBDNQekcnm9jDLnSXBiGGTBWnQS9oSA+jZXg6XeAI4RYX9RE9JU9MZ5G9G
         ulC8kRPenP4sljfhCeu+9e2QOn+3vSxso5HU3FjuaHXiGmnwtry+E+sEYq8cOwOc9RDC
         +1DgsmN/gm5ky/EHYRAQkLgA7Nxy7BvOaBpEw=
MIME-Version: 1.0
In-Reply-To: <BLU146-W2199FE83D315A0C2D49B4DCFD90@phx.gbl>
References: <002401cb096b$7d950560$0401a8c0@xphd97xgq27nyf>
	<BLU146-W2199FE83D315A0C2D49B4DCFD90@phx.gbl>
Date: Fri, 11 Jun 2010 10:31:01 -0400
Message-ID: <AANLkTinU_0sr6I7suWnnj_tNId56leHdXplYwSIBmsCY@mail.gmail.com>
From: Warren Ziegler <wd2xgj@gmail.com>
To: rsgb_lf_group@blacksheep.org
DomainKey-Status: good (testing) 
Subject: Re: LF: LF/VLF
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org


Mal,

On 137kHz loops here produce 1W ERP for each 400 Watts of transmitter outp=
ut.

I recall someone posting here from the U.K. that his vertical on 137
produced 700 mW ERP with 650 Watts transmitter output so sometimes
loops are superior.

--=20
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1




On Fri, Jun 11, 2010 at 10:21 AM, Laurence KL7UK
<hellozerohellozero@hotmail.com> wrote:
>
>
> Mal - are you saying small lambda loops are ineffective for dx working=
 at
> LF, say 137Khz?=A0 (where within practical verticals=A0give poorer perfo=
rmance
> in wooded areas....or arent feasible).
>
> Past results would not concur;=A0Small backgarden loops producing around=
 3W
> ERP (on a good day!) have=A0been repeatably seen at >12,000kms - so=A0I=
 beg to
> differ.
>
> Cheers
>
> ________________________________
> From: g3kevmal@talktalk.net
> To: rsgb_lf_group@blacksheep.org
> Date: Fri, 11 Jun 2010 14:39:17 +0100
> Subject: LF: LF/VLF
>
> =A0=A0=A0 All
> Forget about loops, ground rod induction etc if you want to radiate a dx
> signal.The average person could shout and be heard further. A mechanical
> alert/fire siren can be heard several miles away by ear.
> For serious distance DX on vlf=A0a vertical configured =A0antenna is the=
 only
> solution, ie loaded=A0inv L, T ant and some insulated ground radials as=
 long
> as possible.
> one earth spike at the base of the vertical drop wire connected to radia=
ls.
> This is the basic approach and can be fine tuned later once you are maki=
ng
> progress and being heard/seen a few hundred kilometres away.
> 73 de mal/g3kev
>
>
> ________________________________
> Hotmail has tools for the New Busy. Search, chat and e-mail from your in=
box.
> Learn more.