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LF: Traces on 137 kHz in VK again

To: [email protected]
Subject: LF: Traces on 137 kHz in VK again
From: Stefan Schäfer <[email protected]>
Date: Mon, 03 Sep 2012 22:20:45 +0200
Cc: Edgar J Twining <[email protected]>
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Hello LF group,

I just noted traces of my DFCW-180 transmissions again detected by Edgar J. Twining in Tasmania, QE37PD, 16806 km. Capture: https://dl.dropbox.com/u/19882028/LF/DK7FC%20spectrum%201-9-2012-45.jpg

As usual the traces are very weak. With a carefully schooled eye, one can see traces of "DK7F" arround 136.1719 kHz. For example, the K was finished just a few seconds before 19:00 UTC. After my interpretation of that, i searched for a K in my grabber capture archive and found it right to that time: https://dl.dropbox.com/u/19882028/LF/EU60_01.SEP_20.00UTC.jpg

BTW DCF-39 showed a rather low S/N to that time. Ther can be a significant difference between the S/N peaks from DCF and me, although the distance is just roughly 400 km. This effect was also seen at YV7MAE.


Again many thanks to Edgar for running his receive system, continuously and daily providing spectrograms and plots. Edgars receive antenna is an omnidirectional E field antenna.

73, Stefan/DK7FC




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