[hpsdr] MDS

[John B. Stephensen]

Minimum atmospheric noise levels (above thermal noise) for the HF bands in the quietest locations at the quietest time of the year are:

80 m  38 dB
40 m  33 dB
20 m  28 dB
15 m  23 dB
10 m  18 dB

This is according to CCIR surveys. The receiver NF should be 6-10 dB lower.

73,

John
KD6OZH

  ----- Original Message ----- 
  From: FRANCIS CARCIA 
  To: hpsdr at hpsdr.org 
  Sent: Thursday, August 10, 2006 15:42 UTC
  Subject: [hpsdr] MDS


  ***** High Performance Software Defined Radio Discussion List *****




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  I think we want to shoot for an mds of abound -130 dBM above 15 MHz. fc


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