Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25;
From: "Mike Dennison" <mike.dennison@ntlworld.com>
To: rsgb_lf_group@blacksheep.org
Date: Thu, 24 Oct 2013 16:11:00 +0100
MIME-Version: 1.0
Message-ID: <52694694.12403.3674EB@mike.dennison.ntlworld.com>
In-reply-to: <BLU180-W3967763D6B668B169EF55BAC0C0@phx.gbl>
References: <5268F7CC.866.32050D@mike.dennison.ntlworld.com>, <52693D06.31231.112298@mike.dennison.ntlworld.com>, <BLU180-W3967763D6B668B169EF55BAC0C0@phx.gbl>
Content-description: Mail message body
Subject: RE: LF: 74kHz - WG2XRS/5 callsign at last (2of2)
Content-type: text/plain; charset=US-ASCII
Content-transfer-encoding: 7BIT
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Status: O

Oh yes. But it is a little early in the year and it will reduce as it 
does on the other low bands, with some zero static days. When we had 
the band some years ago, we were mostly using CW and QRSS3 over 
shorter distances (my record was about 1100km) but we tended to 
operate early in the morning when the static was at its lowest.

I reduce the interference here by using the quite effective noise 
blankers in my Afedri SDR receiver, together with lots of fast AGC. 
Then heavy limiting and a further noise blanker in SpecLab. The 
resultant 'holes' are small compared with the QRSS60 bit length. 

de Mike

> Mike;
> Is that "pesky static" a characteristic of this band-from your passed
> experience?  
> 
> > From: mike.dennison@ntlworld.com
> > To: rsgb_lf_group@blacksheep.org
> > Date: Thu, 24 Oct 2013 15:30:14 +0100
> > Subject: Re: LF: 74kHz - WG2XRS/5 callsign at last (2of2)
> > 
> > Well, Dex that was the good news. The bad news is that, as I 
> > cautioned earlier, the lower noise level lower in the band was a
> > function of my antenna pass band, and not of absolute noise. I re-
> > tuned to a lower frequency and it wasn't any better. So the current
> > frequency seems as good as any. 
> > 
> > Interestingly, I left my SDR plotting a few kilohertz around 74k
> > last night with long integration and I could see the shape of my
> > antenna passband produced by the night-time static acting as a
> > broadband noise generator. At last, I have found a use for that
> > pesky static!
> > 
> > de Mike
> > =======
> > 
> > 
> > > Mike Dennison wrote:
> > > > More pics including the XRS/5 caps.
> > > Thanks Mike!  That's a keeper.
> > > 
> > > Dex
> > > 
> > 
> > 
> > 
>