I was an early adopter of the K3 and installed all the hardware audio updates as they were released. I'm picky about audio and the K3 ssb rx audio was quite good. At http://n1eu.com/K3/K3_notes.htm you can see before/after audio spectral plots showing the differences the hardware updates and rx equalization made. Please ignore much of the other outdated info on that Web page.
As others have indicated, K3 tx audio needs more careful setup (as compared to other radios) in terms of sufficient audio drive and compression in order to maintain consistent output power level. The K3 with subrx does quite a good job of pulling out the weak ones from the noise on topband, as does the Ten-Tec Orion/RX366. I'd rate these two as top of the heap. The new DDC/DUC SDRs are promising (Flex 6700, ANAN-100D) but are not quite ready for prime time in terms of diversity reception and full feature set, GUI, etc. 73, Barry N1EU _________________ Topband Reflector Archives - http://www.contesting.com/_topband
