[hpsdr] MDS

[John B. Stephensen]

The CCIR study covered 3-30 MHz and since I've never had a decent 160 meter
antenna, I can't comnment on that band. On 6 meters, there is galactic noise
that should be abou 12 dB above thermal noise with an omnidirectional
antenna. My experience in residential areas is that man-made noise is
several dB higher than this. If you have a beam pointing outside the
galactic plane, EME'ers say that  noise levels are much lower.

73,

John
KD6OZH

----- Original Message ----- 
From: "Grant Hodgson" <grant at ghengineering.co.uk>
To: <hpsdr at hpsdr.org>
Sent: Friday, August 11, 2006 12:23 UTC
Subject: Re: [hpsdr] MDS


> ***** High Performance Software Defined Radio Discussion List *****
>
> John
>
> Many thanks for posting this - I've never seen it before.  Please could
you
> post the data for 160m and 6m as well if you have it, to complete the
list?
>
> regards
>
> Grant G8UBN
>
> >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.
>
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