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RE: [Discuss-gnuradio] Re: gnu radio with a soundcard

From: Mathew George
Subject: RE: [Discuss-gnuradio] Re: gnu radio with a soundcard
Date: Thu, 18 Sep 2008 07:39:40 +0000

Hi all,

Thanks for the responses, so far.

Yesterday I came across the elektor project on SDR via USB and soundcard, at - http://www.elektor.com/magazines/2007/may/software-defined-radio.91527.lynkx   . All the details including the necessary software is freely downloadable, from the Elektor website.

This seems to be fully functional in 150 kHz - 30 MHz band, and needs a supported sound card, for its operation. Pre-assembled boards costs about 110 euros (tested units from Elektor), where as one can consider building the unit on his own tor educe the costs. Pre-fabricated PCBs for this project is available for 28 euros or so per piece.

Can someone comment, whether it is possible to make the unit working with GNU radio? If the answer is yes, how to proceed? What would be the first steps?

Thanking you,

Mathew George

From: address@hidden
To: address@hidden; address@hidden
CC: address@hidden
Subject: RE: [Discuss-gnuradio] Re: gnu radio with a soundcard
Date: Tue, 2 Sep 2008 00:45:05 -0400


Get a softrock 40.  I/Q sampler based on the quadrature sampling detector (fully balanced. Virtual ground, thus not Tayloe).  High performance, good sensitivity.  Yields I/Q in stereo audio for baseband processing.  If you already have a USRP, get the LFRX.








Frank Brickle and I wrote the SDR core for the software in the GUI shown in the second link (PowerSDR).



Bob McGwier




ARRL SDR Working Group Chair

Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats,


“Trample the slow ....  Hurdle the dead"


From: address@hidden [mailto:address@hidden On Behalf Of sriram s
Sent: Tuesday, September 02, 2008 12:33 AM
To: address@hidden
Cc: gnu radio
Subject: [Discuss-gnuradio] Re: gnu radio with a soundcard


You could try tapping the IF out of an old radio (which uses FETs) . But you will need  a mixer and band pass filters to bring the signal down to a range which your soundcard can handle.



On Sat, Aug 30, 2008 at 11:25 PM, Mathew George <address@hidden>wrote:

>  Hi all,
> Can someone explain how we may build a FM/SW receiver using A/D D/A
> converter in a sound card and minimal additional hardware? Somewhere I have
> read that this is possible, in principle, but could not yet gather info
> suitable for a novice.
> Thanks for the help.
> Cheers,
> Mathew
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