Message-ID: <000f01cb7ba6$b2802040$8d01a8c0@JAYDELL>
From: <jrusgrove@comcast.net>
To: <rsgb_lf_group@blacksheep.org>
References: <COL122-W38C1235D3844DFAD02F983D34A0@phx.gbl> <4CD1CD51.2010103@kpnmail.nl> <1288819317.4cd1d275cc0bf@imp.netikka.net>
Date: Wed, 3 Nov 2010 18:30:19 -0400
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Subject: LF: WSPR window
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This is nuts!

We finally move the US WSPR stations out of the EU WSPR 502.4 window down to a new US WSPR 499.6 
window so that those that want to monitor can have a clear shot at the EU stations. Then the EU 
stations move down to the US WSPR 499.6 window!

If EU stations are looking for US spots they would be better off back in the 502.4 window. Receiving 
stations in the US are less  able to decode EU stations if they are mixed in with strong local US 
stations. Some of the US stations are so strong that when they're occupying a WSPR time slot the 
receiver/decoder is overloaded and no weak DX spots are possible. With several strong US stations on 
the air the problem gets even worse - more time slots are clobbered by the locals.

Here's an example from the other night:

2010-10-31 00:26  G3XIZ  0.503819  -30  0  IO92ub  +27  0.501  WE2XGR/2  FN31is  5420  3368

This was a one shot reception for that night from G3XIZ at signal strength -30. Had G3XIZ been 
transmitting in the US WSPR window and several US stations were active it is highly unlikely that 
this reception would have occured.

The same goes for T/A QRSS. When EU stations transmit in the US QRSS T/A window and US stations are 
active it's just not possible to see EU stations as the local strong signals capture the 
receiver/decoder.

Obviously stations are free to do what they like ... but trying to capture weak DX spots or QRSS 
screens is going to be far less productive if the receiving station is constantly getting clobbered 
by locals.

Jay W1VD  WD2XNS  WE2XGR/2




----- Original Message ----- 
From: "Paul-Henrik" <phl@netikka.fi>
To: <rsgb_lf_group@blacksheep.org>
Sent: Wednesday, November 03, 2010 5:21 PM
Subject: Re: LF: 501150


Hello Lubos & Jan!

Yes, they are legit amateur stations in WSPR mode looking for stateside spots,
at the moment I receive EI0CF and GM4SLV there.

To receive them, change the default WSPR 600m settings to these:

Dial: 0.499600
TX: 0.501100

And tune the receiver to 499.60kHz USB

I can clearly see the wideband noise here but WSPR reception is still good.

BR

Paul-Henrik


Quoting pa3abk <pa3abk@kpnmail.nl>:

> It's WSPR. Assume "they" shift to the lower end in order to catch up
> with US stations.
> Broadbandnoise is rather high at the mom.
> Jan/pa3abk
>
> Op 3-11-2010 21:43, Lubos OK2BVG schreef:
> > They are three stations in data mode in QSO. Frequeny 501.150kHz. Not
> > hams, I think.
> >
> > Lubos, OK2BVG
>
>
>