Ken, I do not believe that harmonic distortion is coming from the K2 - that pattern looks like a soundcard overdriven condition to me.
When you reduce the AF Gain at the K2, you reduce the input to the sound card, and at some point, the soundcard no longer distorts. Use the PC soundcard mixer controls to reduce the gain settings on your soundcard (mic or line-in, whichever you are using, and the master volume) to somewhere between 1/2 and 2/3 of the max settings (if you are using the mic input, you may have to go as low as 1/4 or less), then bring up the gain on the K2 to produce a reasonable size display, As others have noted, -30 dB is probably as high as you can go before the soundcard distorts. 73, Don W3FPR > -----Original Message----- > > I have been thinking that the receive audio from my K2 (#4314) was just > OK, especially on CW when compared to other rigs including a Drake R8 > and a K1. It's not terrible by any means, just not as good as it might > be. > > Today I fed an S9 CW signal into Spectrogram and find that its third audio > harmonic is down approximately 10 dB from the fundamental. The 5th, > 7th, 9th, are down about 4 db sucessively from the next-lower odd > harmonic. > > _______________________________________________ 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
