> A better approach is to set the K3 bandwidth very narrow, and > use a panadapter to produce a waterfall that is independent of > the real receive bandwidth (and which can thus be much wider > than any of the K3 roofing filters).
Absolutely! I've been playing with an RFSpace SDR-IQ and a beta version of Spectravue. It provides panadapter and waterfall that can be set anywhere from 1 to 190 KHz wide ... clicking on it will tune the K3 to put the narrow filters in the right place. N8LP's LP-Pan and PowerSDR should also be able to provide the same capability. SDR-IQ and SpectraVue work very well with microHAM Router since SpectraVue's new external panadapter function can use Router's 2nd CAT port to control the K3 at the same time as a logger and digital mode package like DXLab Suite or HRD/DM780. 73, ... Joe, W4TV > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Erik N Basilier > Sent: Sunday, March 22, 2009 5:52 PM > To: Jim Brown; [email protected] > Subject: Re: [Elecraft] K3 and PSK31 Data Mode and ESSB > > > I agree with Jim, and not just w.r.t. invading contesters but > other PSK31 stations as well. The wider the waterfall, the > greater the chance that > another > station within it is stronger than the wanted station, and > adversely affects reception through receiver AGC action. The > architecture with an AGC-using radio producing audio that > goes into a soundcard is a bit of a dead end, the ultimate > death of which is postponed by myths that everything will be > OK as long as nobody uses more than 20-30 W. Manual gain > control helps of course, but somewhat defeats the convenience > of click-to-tune. A better approach is to set the K3 > bandwidth very narrow, and use a panadapter to produce a > waterfall that is independent of the real receive bandwidth > (and which can thus be much wider than any of the K3 roofing filters). > > 73, > Erik K7TV > > ----- Original Message ----- > From: "Jim Brown" <[email protected]> > To: <[email protected]> > Sent: Sunday, March 22, 2009 9:02 AM > Subject: Re: [Elecraft] K3 and PSK31 Data Mode and ESSB > > > > On Sun, 22 Mar 2009 07:44:31 -0700 (PDT), Bill Strong wrote: > > > >>Once > >>generally known, this ability to operate PSK31 in ESSB with > click and > >>transmit across a 3.5 kHz waterfall would I think make the K3 even > >>more attractive to data mode operators than it already is. > > > > Yes, but: another HUGE advantage of the K3 is its ability > to get very > > narrow to pull very weak PSK31 (or RTTY) signals out of the > noise with > > both a selectable fixed roofing filter, and a variable > filter that can > > be made very narrow filter and tuned around a bit. I would > think that > > PSK operators would find this quite useful for working through QRM > > when contesters forget and accidentally invade their usual haunts. > > > > 73, > > > > Jim K9YC > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
