Jean Claude: The QSD in the article needs a preamp to operate well on 6 meters. The minimum discernible signal of the SDR-1000, unmodified on the 6 meter band is -125 dBm. This is 15-20 dB too high. You will need a preamp to make it perfect. Also, the SDR-1000 puts out 1 watt on 6 meters.
That said, with care, and some rework of the circuit with new parts, better layout, I believe the QSD will do -135 dBm on 6 meters and then need only 10 dB gain to work well on six meters. Good luck N4HY jabauzit wrote: >Hello Bob, > >I am very interested to build a high performance SDR for 6m but >there is not much information. > >The SDR-100 does 6m, but no numbers are published. > >Up to which frequency does the QSD works. > >What kind of performance could be achievable? > >Jean-Claude Abauzit, PJ2BVU > > > -- Laziness is the number one inspiration for ingenuity. Guilty as charged! ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
