I think it was me who used the term "ghost" signals when referring to the harmonically related CW traces I could see on the CW Skimmer display. I probably would have been completely unaware of it if I had never tried this program. It was only obvious as I was listening to CW with a narrow filter and the "ghost" traces were appearing in the part of the waterfall that you would be expect to be dark because it was outside of the passband. I would agree with the suggestion that the harmonics are at a low level relative to the main signal because they are masked by band noise when you open the filter up. I don't think there is much risk of calling someone on the third harmonic by mistake. I don't know what the voltage level of the line output is but the traces disappear if you turn the level down to 2, which unfortunately is too low for most sound card programs.
I don't know if those same harmonics are present on the speaker or headphone outputs, as distinct from the computer audio feed. I can only say that I find the K3 audio exceptionally pleasant to listen to. I much prefer it to the K2, or the FT-817, which are the only other radios I have. The only other radio I have had that sounded as clean and low-distortion as the K3 was an IC-756PRO that I had many years ago. If the harmonics are down by the kind of amounts that others have measured then the distortion figure is still within the specification for what after all is not meant to be an audiophile quality hi-fi output stage. ----- Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directory http://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Harmonic-Distortion-tp797780p832695.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
