http://www.elecraft.com/K3/Lyle%20Johnson%20explains%20Noise%20Reduction.htm On 8/27/2015 7:41 AM, Bob McGraw - K4TAX wrote: > Regarding the K3S NR function, are there any written definitions, other than > page 27 in the manual, as to the effect or responses for the various numbers > F1 - F8 and their derivatives? >