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Re: LF: RE: webSDR

To: "[email protected]" <[email protected]>
Subject: Re: LF: RE: webSDR
From: Rik Strobbe <[email protected]>
Date: Fri, 19 Jun 2009 13:54:14 +0200
In-reply-to: <002701c9f0ca$3139ee70$0301a8c0@mal769a60aa920>
References: <[email protected]> <[email protected]> <[email protected]> <002701c9f0ca$3139ee70$0301a8c0@mal769a60aa920>
Reply-to: [email protected]
Sender: [email protected]

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" <[email protected]>
To: <[email protected]>
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: [email protected]
>>[mailto:[email protected]]On Behalf Of Richard Newstead
>>Sent: 18 June 2009 10:09
>>To: [email protected]
>>Subject: LF: webSDR
>>
>>
>>Now covers LF/MF:
>>
>>http://websdr.ewi.utwente.nl:8901/
>>
>>73
>>
>>Richard
>>G3CWI
> DZZ
>
>


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