Now the SDR-1000 is relegated to a close second. :>) We basically listened to our 1000 owners in design of the 5000. Gerald
Gerald Youngblood, K5SDR FlexRadio Systems Ph: 512-535-4713 Fax: 512-233-5143 Email: [EMAIL PROTECTED] Web: www.flex-radio.com > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Steve > Kirk (KW5TX) > Sent: Thursday, August 09, 2007 8:42 AM > To: [EMAIL PROTECTED] > Cc: FlexRadio Systems email reflector > Subject: Re: [Flexradio] pix of new FLEX-5000 arriving... > > Interesting....but 6 months ago the SDR1000 was the best > radio in the world....go figure > > > kw5tx > > Robert McGwier wrote: > > > > http://n4hy.org/20MeterBottom.png > <http://n4hy.org/20MeterBottom.png> > > http://n4hy.org/6MeterBottom.png <http://n4hy.org/6MeterBottom.png> > > > > shows the bottom end of 20meters and 6 meters (bottom 192 kHz). > > > > There is no comparison between the LO in the 5000 and the > AD9851 found > > in the SDR-1000. There are tiny spurs, evident in this > picture. But I > > am stealing, err uhh, copying, err uhh, analyzing and using the spur > > elimination routines from linrad. ;-) The tiny spurs that > are evident > > in the 5000 are not numerous, they are more widely spaced than the > > SDR-1000, primarily because of the much higher clock frequency. In > > addition, the new DDS has essentially no clock leakage at > subharmonics > > of the main clock as compared to the AD9851 which as everyone will > > remember, produced horrible spurs just above 50 MHz in the > SDR-1000. I > > picked these pictures not because they were the best but > because they > > show the bottom of the band. > > > > I have a beta radio, the front end and the exciter (QSE) have been > > improved in the production radios, but the LO has not > changed at all. > > > > My MDS on six meters with the preamp on is -126 dBm. This > will not make > > a 6 meter operator stand up and take notice. HOWEVER, the Flex 5000 > > makes it utterly trivial, with no external switching > required, to drop > > in a preamp in the RX In / RX Out path. Its gain must be > known to put > > into a gain table so the radio remains calibrated. > > > > The Flex 5000 is a much cleaner receiver and there is simply no > > comparison whatsoever in the QSE. The IMD is very good in the entire > > amplification chain. However, we will be providing, after things > > settle down on the release, a linearization button or check box. If > > you remember the typical power curve, it is linear and then > folds over > > at the top as you near the max output. One can trivially invert that > > curve. If in addition to this inversion, we do a little phase > > correction in the TX filter, this will be a superbly clean > transmitter, > > with very small IMD. This will be especially important on > digital modes > > and for those that have power to burn in driving their > amplifiers, this > > will produce one of the cleanest sounding radios ever. > > > > WARNING: The algorithms mentioned here will not be in the > 1.10 release. > > They are to follow shortly after once they have been fully vetted as > > functional and not harmful. I am certain they will be popular. > > > > Bob > > N4HY > > > > Philip Covington wrote: > > > On 8/8/07, Ken N9VV <[EMAIL PROTECTED] > <mailto:n9vv%40wowway.com>> wrote: > > >> I put together a few pictures of what the new packaging > looks like. It > > >> is solid and well thought out. There are surprises in > the box. I know > > >> you will be as thrilled as I was to receive your new FLEX-5000 > > >> http://www.n9vv.com/FLEX-5000-arrives-N9VV.html > > <http://www.n9vv.com/FLEX-5000-arrives-N9VV.html> > > >> > > >> First impressions: > > >> ----------------- > > >> o The rig is heavy and solidly built. I thought it would > be about like > > >> the SDR-1000. It is much more solid and has really professional > > >> attention to details. > > >> > > >> o I never listened to WWV on 15Mhz because my Jupiter > couldn't hear > > >> it. I can now click through ALL the WWV stations on > 2,5,10,15, and even > > >> 20Mhz with the FLEX-5000. > > >> > > >> o The preamp comes on automatically on the higher bands > and the audio > > >> stays exactly where you put it for best listening. > > >> > > >> o Setup is so easy that you will think you missed > something. Hook up > > >> some powerpole connectors, your speakers, an antenna, > and a Firewire > > >> cable to your PC and you are all set to enjoy your new > rig. There is no > > >> more XG-1 signal level, image, or frequency adjustments! those > > >> adjustments are all done at the factory now. > > >> > > >> o My new rig has been on PSK31 and CW and has not missed > a beat. I > > >> was always impressed with my SDR-1000. This second > generation from Flex > > >> easily surpasses it. > > >> > > >> o I believe SDR has finally turned the corner from a hardware > > >> curiosity and experimental platform to a viable solid performer > > that can > > >> hold it's own against anything in the Ham market. > > >> > > >> all the best, > > >> de ken n9vv > > > > > > I am sure there are many people as curious as I am: How does it > > > perform on 10 and 6 meters? How many spurs are you seeing above 20 > > > MHz? > > > > > > 73 Phil N8VB > > > > > > > -- > > AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, > > TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair > > "If you're going to be crazy, you have to get paid for it or > > else you're going to be locked up." Hunter S. 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