Evert. I have no intention to dispute your observations. It is just that mine are different. You are justified in being persistent to find out if there is a problem with some K3s or if it is a localized problem, or exactly what, but as far as I can tell, it is not apparent on my K3.
In my observations, I have concluded that the AGC has a lot to do with how the K3 sounds. I particularly liked the way the K2 AGC response sounded, so I have used Jack Smith's charts at http://www.cliftonlaboratories.com/elecraft_k3_agc_and_s-meter.htm to modify my AGC parameters to have a response more like the K2 (strong signals sound stronger, weaker signals weaker). Those settings made a great difference to me, and made the audio much smoother. Secondly, the AGC improvements with MCU 3.03 (and higher) made an additional difference. Is it possible that the AGC settings make a difference in the perception of "hissing audio" that we have been discussing? I don't know the answer, but provide it as "food for thought". 73, Don W3FPR 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 > > > ______________________________________________________________ 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
