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Re: LF: WSPR Reports

from [Roger Lapthorn] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: WSPR Reports
From: Roger Lapthorn <[email protected]>
Date: Tue, 4 Jan 2011 20:11:16 +0000
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Andy,

I'm pleased to report your 137kHz WSPR signal is now consistently coming in about -12dB S/N at 188km and this is off the side of the loop to a large degree. PA0A is also several dB stronger, so the preamp in front of the FT817 is helping.

BTW, F6CNI always gave me great reports on 500kHz and far above that from others at similar range. I wasn't complaining!

73s
Roger G3XBM

On 4 January 2011 19:17, Andy Talbot <[email protected]> wrote:
Looking at the WSPR database, F6CNI is decoding me consistently in the 0dB S/N region.  
 
At 391km this can't be realistic, and most likely comes from using a narrow filter - sub 200Hz - before feeding audio to the decoding software.    The WSPR software does need a flat audio response in the 1400 - 1600Hz range, and preferably over the complete SSB bandwidth.
 
Andy
 
 



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