Not once in my experience has the K3 NB made clicks worse (that's N*B* I'm talking about, not N*R*). I gave a formula in an earlier post in this thread. I invite anyone to actually try it and see. NR does not seem to do anything for or against clicks.
73, Guy. On Tue, Dec 1, 2009 at 12:57 PM, Paul Christensen <w...@arrl.net> wrote: > All good suggestions, Ron -- including turning off the NB if not mentioned > previously. Engaging the NB function oftentimes produces > internally-generated clicks. > > Paul, W9AC > > ----- Original Message ----- > From: "Ron D'Eau Claire" <r...@cobi.biz> > To: "'Elecraft Reflector'" <elecraft@mailman.qth.net> > Sent: Tuesday, December 01, 2009 12:51 PM > Subject: Re: [Elecraft] K3: killing RX key clicks > > >> Key clicks can be generated by several different mechanisms within the >> receiver itself. Paradoxically, it's easier to produce false clicks with a >> high performance receiver than it is with a lesser receiver. >> >> These have nothing to do with the transmitted signal. >> >> The first line of "defense" is to turn off the Preamp and turn on the >> Attenuator to reduce the overall strength of the signals. Next is to set >> the >> AGC to "Slow" to ensure a strong signal isn't within the roofing filter >> bandpass and triggering the AGC while the variable DSP filter is set >> narrow >> so the beat note isn't heard. In some cases using the RF gain to control >> the >> level helps a great deal. Another approach is to use a narrower roofing >> filter or to shift your bandpass so the edge of the roofing filter is very >> close to the desired signal on the side toward the interfering station and >> as far from the interfering station as possible. Shifting the bandpass may >> require you open up your DSP bandwidth to continue to hear the desired >> signal or shifting the DSP filter position within the roofing filter >> bandpass. >> >> And, remember, "clicks" are an essential component of a CW signal. They >> are >> the sidebands created by modulating (keying) the signal. Very careful >> shaping of the keying envelope, such as used in the K2 and K3, can >> minimize >> clicks while maintaining an easily readable signal, but the only way to >> completely eliminate clicks is to not key the signal at all. With a really >> high-performance you can snuggle up very close to a signal, as many here >> have noted. When you do that, you're much more likely to hear the >> essential >> clicks required for good keying. >> >> Ron AC7AC >> >> > > > -------------------------------------------------------------------------------- > > >> ______________________________________________________________ >> 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
