Barry and Don I have the Signalink USB. However I have it dedicated to the K2. For the KX3, I was thinking of creating a dongle with the attenuation resistors Don suggested instead of buying another Signalink. I realize that I will still have to adjust the soundcard levels to make the TX just tickle the ALC. Is there a flaw in this plan? Ariel
> Date: Thu, 18 Jul 2013 10:20:12 -0400 > From: k3...@comcast.net > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] PSK31 KX3 Elmer needed! > > Don/Dave, > > Let me start with I use a SignalLink USB and the cables supplied > with my Windows7 PC. I find that it is not necessary to do anything to > interface except just plugging in the cables. The SignaLink has its own > sound card and front mounted pots for level adjustments. This > arrangement works fine here. > > Now having said what I do, I'll relate some things that I have seen > that have caused real problems. Probably, the largest number of failures > that I have encountered is the failure of laptop computer sound cards of > transmitting and receiving on the same frequency. I have not > investigated as to why this happens, but it does. Some digital mode > software allow you to calibrate this problem out; Apple and the > SignaLink don't seem to have this problem. Some use VOX to key their > transmitters, but don't set it correctly. The last major failure I have > seen is over driving the radio so that the distortion is too high for > the other guy to demod and decode; you really need to keep your transmit > levels well within the linear region of your transmitter. That means > don't allow the ALC to kick much and NO compression. > > > 73, > Barry > K3NDM > > > > On 7/17/2013 8:32 PM, Don Wilhelm wrote: > > Dave, > > > > It sounds like you are being frustrated by all the choices available. > > If you want to end up with Fldigi, I suggest you start with that > > application. It is multi-platform and will work the same on a PC or a > > Mac. > > > > The first thing you need to get a grasp on is the audio levels > > involved. That does require you to have some familiarity with the PC > > or Mac that you are using and its soundcard input/output levels. > > > > Usually, one takes the computer audio output from the Line out jack > > (the green one). That will be fed to the KX3 MIC input, but the level > > is about 100 times too high, so an attenuator is needed. Usually a 100 > > K resistor in series with the Line out signal and a 10k resistor on > > the KX3 side will do the job. > > > > On the other direction, the KX3 headphone output will provide the > > audio to the computer. This will be fed to the computer Line In or > > lacking that the Mic Input. Again an attenuator will be required. If > > you are using the computer Line In level, a 10k resistor in series > > with the KX33 headphone output and a 10k resistor across the line on > > the computer side will do nicely, but if you are using the computer > > mic input, the series resistor should be increased to 10k. > > > > If you are dealing with stereo inputs and outputs on the computer, the > > normal applications will only use the left channel which is the > > connection to the tip of the soundcard jack. > > > > That should get you started. As far as Fldigi is concerned, I would > > suggest using RigCAT and selecting the K3 as the rig in the pulldown > > menu. Use PTT thru RigCAT and it should work. > > > > 73, > > Don W3FPR > > > > On 7/17/2013 6:10 PM, Esquer Dave wrote: > >> Hi folks, > >> HF Newbie frustrated with PSK-31 setup on my new KX3. I have tried > >> everything with no joy. I need an ELMER! I've tried so many > >> permutations that all of my hair has fallen out! > >> > >> I have PC and Mac laptops, Digipan 2.0, Fldigi, PSKer (for iPad) and > >> am missing ALL of the basic setup knowledge to get this stuff > >> working. I've played all the Youtube videos too, especially KD0BIK's, > >> but I'm still stuck in the basic hardware and software setup. > >> > >> I would like to first try PC Digipan, but am open to anything. > >> > >> Somewhere, there must be a simple step-by-step setup recipe to > >> interface the KX3, its microphone and headphone cables and the mic > >> input, headphone output from the computer. I also have a Griffin iMic > >> that I've attempted to throw into the mix, again with no joy. > >> > >> I've read the Data Modes section in the manual and Chapter 7 Digital > >> Modes of the Fred Cady book. They just add to my confusion. > >> > >> Looking at the Fred Cady book, Figure 7.4 and 7.5 and Chapter 7 > >> sections 7.4 (107-108) and 7.7 (121-122), ALL remain a mystery to me, > >> which hookup do I use? > >> > >> My assumptions so far: > >> Low power, 5 watts or less > >> I need to put the KX3 into Data A mode, not PSK-D > >> I can interface the KX3 to the computer without the iMic or other > >> external sound card (figure 7.5 of Fred's book)? (Should/how/why do I > >> use the iMic?) > >> I need to set the MIC BTN to OFF > >> > >> I would eventually like to end up with PSK31 working on my Mac (with > >> Fldigi), but I'd like to get it working on the PC laptop first to > >> help me understand all of its nuances. > >> > >> Arghhh … please help a newbie! > >> 73, > >> Dave, K6WDE > >> dave.esq...@gmail.com > >> > >> > >> > >> > >> > >> > >> ______________________________________________________________ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> 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:Elecraft@mailman.qth.net > > > > 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
