well I am going to stir the pot again with my probable final comments on my SDR-IQ. first the good, never had a panadapter or bandscope, it works great for that. The filters are very good. The issues to me are the following, it is noisy, to itself and also to a receiver on the same antenna, it lacks sensitivity, it has spurs, and the big one to me is the audio quality, a moderate strength AM signal is difficult to understand and when on my hollow state stuff it is nearly %100 copy. The present computer is a 2.2gig quad core, no performance change above a single core 1.8 gig. Numerous different audio systems confirm that it is the nature of the beast.
I have read numerous articles on D-A and A-D processing and believe that 14 bit is not going to do the job that I want. I suspect 24 bit and a much higher sampling rate, 150 meg? would just about cure the audio issue for me. I am starting to believe that the glowing reports written about SDR are prepared by those that have never used an old VT receiver or have one available to run beside the sdr. My FT1000 Mark V had glowing reports and I am really disappointed with it. I have an ever deepening respect for those that designed and built the old classic receivers. Looking at noise figures and sensitivity on those old dogs places them very close to theoretical limits, pretty amazing. I have put my money where my mouth, I should, about April 10 or so have a completely reman R-390A. I was going to try the Flex 5000, but as I posted earlier they did not see fit to respond to my questions, perhaps thinking the questions were not fit to respond too. Earth hour is today, be sure to turn on all of your lights to help save the grid and generators. ! Bernie W8RPW ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
