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	<8D2F6BC4F451A9F-14C8-11CB41@webmail-vd001.sysops.aol.com>
Date: Sat, 28 Nov 2015 14:17:14 +0000
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From: Andy Talbot <andy.g4jnt@gmail.com>
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: More EbNaut 137.777
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Bit late replying to this !
You forgot to show the squared term, although the final value is correct

1579 * (10/36145)^2 = 121uR

SO.....  How come no one else spotted the equation worked out incorrectly
:-)

'JNT


On 26 November 2015 at 23:50, Markus Vester <markusvester@aol.com> wrote:

> >> How can I estimate Rrad for a 100m wire at 10 m average height on 8.3 kHz?
>
> 1579 ohms * (10 m / 36145 m) = 121 microohms
>
>
>
> Joe, if you wanted you could almost copy Stefan's VLF coil described on his website, using thin enameled wire on a large water barrel.
>
> Assuming your antenna can withstand 28 kV rms, you could run 0.8 A which would instantly put you into the TA playground with Paul.
>
>
>
> 73, Markus
>
>
>
> PS. 20 dB more will get you 10 times as far (at least in free space ;-)
>
>

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<div dir=3D"ltr">Bit late replying to this !<div>You forgot to show the squ=
ared term, although the final value is correct</div><div><br></div><div>157=
9 * (10/36145)^2 =3D 121uR</div><div><br></div><div>SO.....=C2=A0 How come =
no one else spotted the equation worked out incorrectly :-)</div><div><br><=
/div><div>&#39;JNT</div><div><br></div><div><br></div><div class=3D"gmail_e=
xtra"><br><div class=3D"gmail_quote">On 26 November 2015 at 23:50, Markus V=
ester <span dir=3D"ltr">&lt;<a href=3D"mailto:markusvester@aol.com" target=
=3D"_blank">markusvester@aol.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><pre style=3D"font-size:9pt"><tt><font face=3D"Arial, Helveti=
ca, sans-serif">&gt;&gt; How can I estimate Rrad for a 100m wire at 10 m av=
erage height on 8.3 kHz?=C2=A0<br>

<div><font face=3D"Arial">1579 ohms * (10 m / 36145 m) =3D 121 microohms</f=
ont></div>

<div>=C2=A0</div>

<div>Joe, if you wanted you could almost copy Stefan&#39;s VLF coil describ=
ed on his website, using thin enameled wire on a large water barrel.</div>

<div>Assuming your antenna can withstand 28 kV rms, you could run 0.8 A whi=
ch would instantly put you into the TA playground with Paul.</div>

<div>=C2=A0</div>

<div>73, Markus</div>

<div>=C2=A0</div>

<div>PS. 20 dB more will get you 10 times as far (at least in free space ;-=
)</div>
</font></tt></pre></blockquote></div><br></div></div>

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