Date: Fri, 19 Jun 2009 13:54:14 +0200
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
From: Rik Strobbe <rik.strobbe@fys.kuleuven.be>
In-Reply-To: <002701c9f0ca$3139ee70$0301a8c0@mal769a60aa920>
References: <4A3A0412.4070606@btconnect.com>
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Message-Id: <20090619115408.D8EA531E702@smtps01.kuleuven.be>
Subject: Re: LF: RE: webSDR
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Mal,

depends on what you expect from it.
At the Twente university the WEBSDR covers 8 frequency bands each 
600kHz wide (ham bands from 1.8MHz up to 21MHz plus DC-600kHz) with a 
single ADC fed by a single antenna.
For me that is a real masterpiece, even though the system is not 
optimized for 500kHz.
As far as I have tested it works pretty good on HF and for LF/MF broadcast.
Just don't expect the same sensitivity from such a WEBSDR as from 
some grabbers dedicated to 500kHz.

73, Rik  ON7YD

At 12:39 19/06/2009, you wrote:
>WEBSDR is no good from what you have observed.
>de G3KEV
>
>----- Original Message -----
>From: "Rik Strobbe" <rik.strobbe@fys.kuleuven.be>
>To: <rsgb_lf_group@blacksheep.org>
>Sent: Friday, June 19, 2009 9:45 AM
>Subject: Re: LF: RE: webSDR
>
>
> > Hello Richard, all,
> >
> > I did some 500kHz tests last night with the Twente websdr:
> > - I cannot hear or see my own signal on the websdr (abt. 1W ERP,
> > distance 200km)
> > - While I heard G3KEV 599+ here I could not hear or see on Mal on the
> > websdr (distance G3KEV-me = 510km, distance G3KEV-Twente = 540km)
> > I guess a W3DZZ dipole is not the perfect antenna for 600m.
> >
> > The above is not meant to criticize the WEBSDR project of the Twente
> > university (all respect for this masterpiece), just to inform that
> > one shouldn't panic it your 500kHz signal doesn't show up.
> >
> > 73, Rik  ON7YD - OR7T
> >
> > At 22:29 18/06/2009, you wrote:
> >>Amazing!
> >>
> >>I heard a couple of NDBs, "LAA" and "LI". You can also see what
> >>frequencies
> >>the other users are using, which is interesting in a curious way!
> >>
> >>73, Dave G3WCB IO91RM
> >>
> >>-----Original Message-----
> >>From: owner-rsgb_lf_group@blacksheep.org
> >>[mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Richard Newstead
> >>Sent: 18 June 2009 10:09
> >>To: rsgb_lf_group@blacksheep.org
> >>Subject: LF: webSDR
> >>
> >>
> >>Now covers LF/MF:
> >>
> >>http://websdr.ewi.utwente.nl:8901/
> >>
> >>73
> >>
> >>Richard
> >>G3CWI
> > DZZ
> >
> >
>
>
>--------------------------------------------------------------------------------
>
>
>
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