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Re: LF: More EbNaut 137.777

To: [email protected]
Subject: Re: LF: More EbNaut 137.777
From: Andy Talbot <[email protected]>
Date: Sat, 28 Nov 2015 14:17:14 +0000
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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 <[email protected]> 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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