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Re: VLF: DK7FC, DF6NM

To: [email protected]
Subject: Re: VLF: DK7FC, DF6NM
From: Wolfgang Büscher <[email protected]>
Date: Sun, 16 May 2010 16:52:34 +0200
In-reply-to: <4C45F8A838FD40F5857397889905F3B0@White>
References: <002701caf394$44cbd980$0401a8c0@xphd97xgq27nyf> <[email protected]>, <[email protected]> <21362360.1919671.1273934921253.JavaMail.fmail@mwmweb079> <38A51B74B884D74083D7950AD0DD85E82A1BF0@File-Server-HST.hst.e-technik.tu-darmstadt.de> <4C45F8A838FD40F5857397889905F3B0@White>
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Nice signal here from the begin of Stefan's transmission. Later, strong QRN, and it takes a lot of imagination to see something like a "K" in DFCW around 13:30 UTC (15:30 local time on the screenshot) which may be from Markus DF6NM . In the screenshot, one can see the effect of the 'hard limiter': Before 14:30 it was off (-> screen almost 'whitened' by QRN), and after that all pulses exceeding the average level by 3 dB were limited (clipped, not blanked) to that level. Not sure if the noiseblanker (instead of the limiter) would have been better.

73,
 Wolf DL4YHF .





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