... and don't forget the ongoing HPSDR (High Performance SDR) project that can be found at http://openhpsdr.org/
Though some of the original hardware is no longer available from TAPR replacement hardware is available from Gerd Loch DJ8AY et al. Please note that the receiver in this project is NOT based on QSD but DDC - Digital Down Conversion i.e. there is a high speed A/D converter at the antenna socket. This way there is no problem with sound cards and phase differences in the I/Q paths as the signal is all digital from the ADC onward. It uses the same software as the excellent Flex-Radio kit. The transmitter is a DUC - Digital Up Converter. So the signal path is digital all the way to the D/A converter then analogue for amplification. HOWEVER - this kit is not cheap. It is considerably more expensive than the Elektor and LD-1A units but, regardless of G8VOI's protestation to the contrary, it probably out performs most commercially available amateur equipment. viz the digital filters have vertical sides and are near infinitely variable in width etc.. Don't ask me to quote specs because I can't. Do the research yourselves. Cheers Chris G4NUX On 16 Mar 2010, at 19:35, Chris wrote: > Take a look at http://www.flex-radio.com/ > > 73, Chris ZL1BOE > > --- In soft_radio@yahoogroups.com, "hank smith" <hanksmi...@...> wrote: > > > > hello has any one created a 2-way radio sdr yet? > > if so what would it take to get something designed? > > this would use the internet I am thinking as a platform eg sip its a idea I > > have been kicking around in my brain > > heck any way to find other sdr stuff not just hf and am listening? > > thanks guys you rock > > Hank > > > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/soft_radio/join (Yahoo! ID required) <*> To change settings via email: soft_radio-dig...@yahoogroups.com soft_radio-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: soft_radio-unsubscr...@yahoogroups.com <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
