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From: Andy - KU4XR <ku4xr@yahoo.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: wspr Narrow Bandwidth
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http://www.kc3ol.dynip.com/forums/showthread.php?t=369
Mal: follow that link and you will see that Yes narrow filters
do work with WSPR reception. If you know the exact frequency of
the transmitting station, you can go as narrow as 10Hz if you
choose. The wider BW, the, more stations you can receive, the
narrower BW, fewer stations come through. WSPR software monitors
200Hz, YOU!! can monitor any BW you want inside the software.
Andy - KU4XR - EM75xr - Friendsville, TN.
LOWfer Beacon " XR " @ 184.322 KHz ( QRSS-60 )
Coordinates: N: 35* 43' 54" - W: 84* 3' 16"
http://www.myspace.com/beaconxr
--- On Tue, 12/23/08, mal hamilton <g3kevmal@talktalk.net> wrote:
> From: mal hamilton <g3kevmal@talktalk.net>
> Subject: LF: wspr
> To: "rsgb" <rsgb_lf_group@blacksheep.org>
> Date: Tuesday, December 23, 2008, 1:50 PM
> If recent published info is correct, this specifies a
> bandwidth of 6hz why is USB with a bandwidth of 3 khz
> necessary to receive this transmission.
> Surely it would be obvious that CW mode was more
> appropriate where one could use a narrow filter and dsp
> processor of a few hertz.
> I have asked this question before but never got an answer.
> g3kev