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
