[Elecraft] K3 Design

[Brett gazdzinski]

 Another thing elecraft is doing with the K3 is to put in
ham band only bandpass filters, with general 
coverage filters optional, but when operating in the ham bands, the
ham band filter is switched in.

The single conversion is likely the major reason the K3
(and the K2) are so good.

My homebrew single conversion receivers seem to work real
well, a good 455 KHz filter is all it takes.
Ham bands only, very quiet, nothing modern works
as well as the homebrew receivers, except maybe the K3!
 

Brett
N2DTS