At 04:08 AM 10/16/2006, Andy Smith wrote: >Thanks for all the suggestions, in this case I am not looking to use it with >PowerSDR, it is for another project with a Winradio G305. I am looking to >try and improve the VHF/UHF sensitivity, I currently own a Firebox, FA-66 >and Delta 44 which I use with the SDR1000. > >In your expert opinion Alberto, would I get as much as 3dB sensitivity >improvement over these other high end sound cards, if not I probably could >not justify buying it.
Are you looking for raw sensitivity (which would seem to equate to gain and noise figure) or dynamic range? if it's just minimum detectable signal that you're worried about, why not a very low noise opamp. There's a fair number of low noise op amps, and if you're really obsessive about 1/f noise, there are some very, very quiet JFETs out there, but more likely, things like construction practices (the kind of resistor you use, and whether you use a board or "floating in air on teflon post" construction. >Best regards, >Andy. > >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of Alberto I2PHD >Sent: 16 October 2006 11:06 >To: FlexRadio@flex-radio.biz >Subject: Re: [Flexradio] Best Sound Card For Sensitivity Only > >Bob Bailey wrote: > > I tried using the EMU 1212 card (PCI) and had no luck. Any suggestions > > Alberto or possibly know why I could not get it to run without pops. > > Bob > > > >Bob and Tim, > > well, to be honest, I haven't tried it with the SDR-1000, as I don't own >one. I have tested the EMU-1616M with my >software Winrad at 192 kHz sampling rate, using the ASIO driver distributed >by M-Audio, and the working was excellent. >Very low background noise, flat response, absolutely no pops. I had it on >loan, and it was with chagrin that I returned >it....:-( > >73 Alberto I2PHD > > >_______________________________________________ >FlexRadio mailing list >FlexRadio@flex-radio.biz >http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >FlexRadio Homepage: http://www.flex-radio.com > > >Send instant messages to your online friends http://uk.messenger.yahoo.com > > >_______________________________________________ >FlexRadio mailing list >FlexRadio@flex-radio.biz >http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >FlexRadio Homepage: http://www.flex-radio.com James Lux, P.E. Spacecraft Radio Frequency Subsystems Group Flight Communications Systems Section Jet Propulsion Laboratory, Mail Stop 161-213 4800 Oak Grove Drive Pasadena CA 91109 tel: (818)354-2075 fax: (818)393-6875 _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
