I've had the same experience and the LPF board being added to my DSP board is what was the final nail in the coffin to the annoying sound. The low audio extension by changing caps here and there helped a little but the low pass filter to help pull the high frequency stuff out of the audio signature.
~Brett (N7MG) On Fri, Sep 17, 2010 at 8:49 PM, Mike Scott <[email protected]> wrote: > I agree with Lou about Susan's CW audio complaint but I did not once. When I > read Susan's plaint I thought that she probably has not gone through the K3 > audio modifications. There was a time that I could not listen to the K3 in > CW mode for very long; it was like fingernails scratching on a blackboard. > The sound so grated on my nerves that I needed to turn it off or stop > operating CW altogether. Somewhere along the path after the audio low pass > filter, the audio output coupling capacitor modifications, and firmware > modifications enhancing LF response the K3 CW mode audio mellowed for me, > actually night and day. The other thing that make a difference is AGC > settings. AGC settings effect IF gain which can raise background noise > level. All of the comments about running RF gain lower come to play also but > I now find that I normally run full RF gain and I am not bothered by audio > issues anymore. > > > > So Susan, what have you done to fix your audio problems in CW? I propose > that you can remedy this. > > > > > >>>I'm surprised you find the CW mode so noisy. I find that one of the best > > things about the DSP in CW mode is that the more you narrow it, the more the > > noise disappears. If the signal is strong enough, I can get rid of the > > noise completely. Lou WA3MIX > > > > AE6WA > > Mike Scott > > Tarzana, CA > > > > ______________________________________________________________ > 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
