The most appreciated feature for many could be improvement of AF amplifiers. Some of the biggest criticism of K3 by those preferring other radios was "harsh" and "fatiguing" SSB receive audio. Ignacy -- View this message in context: http://elecraft.365791.n2.nabble.com/K3S-vs-K3-tp7602970p7602973.html Sent from the Elecraft mailing list archive at Nabble.com.