Wes Stewart wrote: > I worked and have since been listening to J79WE on 40m CW for some time. The > wind is > blowing about 40 mph so the power lines are acting up and I've been tweaking > the noise > blanker. > > While playing around I noted that his signal had developed some chirp. I > thought that > strange, since he was clean when I worked him. I fired up old reliable, my > TS870 and > listened to him and he was T9 with no chirp (and no audio distortion). On > the K3 he > definitely had chirp, then I happened to turn off the noise blanker and the > chirp went > away. > > The Noise blanker setting were IF=MED4 and DSP=T3-7. The chirp seems to be > related to > the DSP part of it. > > Anyone else notice this?
Are you sure it was chirp -- a change in frequency when keying? Or was it a softening of the leading edge of the keyed elements? The latter is characteristic of the DSP noise blanker when it's at an advanced setting, like T3-7. Some distortion is part of the tradeoff for noise blanking. I used to say "you know, it sounds like a guy with a slow-starting crystal oscillator" until I realized that you very rarely hear any crystal-controlled rigs these days. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ______________________________________________________________ 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
