Don, 20 Meters is a good place to start. Make sure your not overdriving your sound card. Turn ATT on , signal are so strong on 20M you dont need a preamp.
GL 73 Ken K5DNL --------------------------------------------------------- --- On Wed, 7/6/11, Don Putnick <[email protected]> wrote: > From: Don Putnick <[email protected]> > Subject: [Elecraft] [K3] Soundcard digital mode follow-up > To: "Elecraft Mailing List" <[email protected]> > Date: Wednesday, July 6, 2011, 2:45 PM > 2nd try - don't know why my last > e-mail was blank > > Thanks to all of you for the suggestions. I didn't make it > clear what the circumstances were, so here goes. > I was using the K3 in DATA A mode with the stock 2700 > roofing filter. No attenuation, preamp, or noise reduction. > I connect the LINE IN and OUT to my MacBook's External > Speaker and Mic. I use cocoaModem software for PSK31. I was > going after weak traces in the presence of 1-3 band hogs. My > first reaction was to do exactly what Don Wilhelm suggested. > I reduced the DSP filter to 400 Hz, but when I did that, the > waterfall saturated. Knowing from a propagation analysis > that it was very unlikely I'd be successful anyway, I gave > up. > > Here are the suggestions I received, the last three in > combination with the first two. > > 1. Decrease the DSP filter bandwidth > 2. Buy a narrow roofing filter for digital modes > 3. Reduce LIN OUT level > 4. Turn Attenuator on > 5. Turn AGC off > > I'll give these a try over the weekend. Thanks again to all > of you > > Don NA6Z K3 #5495 > > > ______________________________________________________________ > 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
