Date: Sun, 25 Jan 2009 00:14:00 +0000
From: John P-G <gm4slv@sighthound.demon.co.uk>
To: rsgb_lf_group@blacksheep.org
Message-ID: <20090125001400.04dcfb58@lurcher>
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	<09254C21C2884198957A5719438826D6@p4>
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Subject: Re: LF: Re: WSPR Beacon on 503.5kHz
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Mark, Jim, LF,

I'm seeing Jim's WSPR very well, and also hearing it, and at a reported
S/N ratio of anywhere between -7dB and +10dB. The strong periods are
very red on the WSPR waterfall, yet there's no trace of a 100Hz
artifact, so perhaps it's a spurious product in your RX/soundcard?

I've used both a vertical (my old TX antenna fed via a 9:1 balun) and a
Wellbrook ALA1530 loop, and get good results from both, but no trace of
any 100Hz sidebands/spurii

Coincedentally I'm also decoding MF DSC at the moment (2187.5) and have
seen decodes tonight from Shanghai Radio and COMMSTA, Miami, so 160m
should be pretty good too?

Cheers,

John



On Sat, 24 Jan 2009 23:36:49 -0000
"Mark" <markhughes1@blueyonder.co.uk> wrote:

> Hi Jim, LF Group
> Fine copy on my grabber / WSPR decode, now I have re-centred the WSPR 
> decoder. I had to change it last week to decode someone..
> Interestingly  sometimes I am seeing an extra faint trace from Jim,
> almost exactly 100Hz up and it even decoded on one over. It is much
> weaker (at least 15dB down). An alias / mixing product on my system?
> or is anyone else seeing this?
> I am not seeing any extra signals on the DI2AM beacon, which is  on
> average 10dB stronger than Jim
> Also getting occasional decodes from G4WGT
> Cheers
> Mark GM4ISM
> 

>