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Re: LF: More EbNaut 137.777

To: [email protected]
Subject: Re: LF: More EbNaut 137.777
From: [email protected]
Date: Fri, 27 Nov 2015 16:25:30 -0330 (NST)
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Hi Markus,

My aerial current is 170mA so 3.5 uW on 8.3 kHz!

Nice Eb/No values, Markus.  Getting ready to start EbNaut again, hopefully
with the timing offset reduced. Intended start time 2000 UTC. CHU weak on 7850 kHz -- hopefully reflex time is good.

73 Joe VO1NA

On Thu, 26 Nov 2015, Markus Vester wrote:

&gt;&gt; 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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