[UK-CONTEST] [CDXC] Re: pile ups

[Colin Wilson]

Bob thanks for the explanation, this could well be the case, something I cant say I had noticed previously to this trip, interesting though just the same, I cant say I have ever experienced it on any of my other rigs such as the FT2k and the FT1k previously but neither have been used on such huge pileups! 

thanks again Bob, hope your keeping well
__,_._,___
73

Colin G3VCQ/J38CW
www.sheffield-live.co.uk

  ----- Original Message ----- 
  From: Bob Henderson 
  To: uk-contest at contesting.com ; CDXC Reflector 
  Sent: Sunday, March 28, 2010 1:11 PM
  Subject: [CDXC] Re: [UK-CONTEST] pile ups


    
  Colin, J38CW wrote:

  "Signals when in the pileup seemed to be weak and sucked into each other and
  although there maybe hundreds calling at anyone time (and there was), once
  you could pull out a callsign the signal would be 5/9 or stronger, any
  explanations?"

  Signal to noise ratio or more accurately signal to QRM ratio. With a dozen
  S9 signals calling together you might have a signal to QRM ratio of only a
  couple of dB and an equivalent received signal dynamic range. When one of
  those signals stands alone at S9 with a background noise level of say S3 you
  night suddenly have S/N of close to 40dB and similar received signal dynamic
  range. The dynamic range of the received signal is a significant
  contributor to the perception of loudness.

  73 Bob, 5B4AGN

  [Non-text portions of this message have been removed]



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