There is a 3.9 KHz digitization artifact about 78 dB down from normal audio level. Is this what you hear?
It's quite visible in a spectrum analyzer view of the K3's audio output. http://www.cliftonlaboratories.com/elecraft_k3_receive_audio.htm - about half way down the page under Headphone Port SSB Mode with 500 Hz Tone - Harmonics Jack K8ZOA Evert Bakker (PA2KW) wrote: > Hi Don, > > It is definitely not band-noise what I'm talking about. > You need a decent signal level (audio strength) to hear it. > For me, I'm quite sure it has to do with the digitalization. That sound is > far from natural and is ADDITIONAL to the normal audio signal. That addition > sounds sharp, metallic, like these "extreme low cost" jingle bell" sounds in > all kind of gifts (sorry for the comparison between these two). But it is > "next" to the normal signal and many db's down. That's why I called it the > silver line around the cloud in the beginning. > The normal signal sounds OK, not as "comfortable" like my TR7 audio but very > good for normal use as we do (at least for me). I just would like to get rid > of this higher freq component which doesn't like to be influenced by > whatever control except the power and volume button :-) . > > I've got 2 K3's and they both give me the same result. > I played with all kind of controls (RX-EQ, AGC-SLP/THR, AGC-S/F, AGC ON/OFF) > and there is no difference whatsoever! > > I apologize for being persistent in this. > > > 73's, Evert PA2KW > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Don Wilhelm > Sent: Monday, April 06, 2009 00:21 > To: [email protected] > Subject: Re: [Elecraft] K3 audio > > I hear no evidence of any "hissy" receiver noise - very quiet. > My conclusion from that is the "hissy" sound is not from the K3 internal > noise. > > ______________________________________________________________ > 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
