[Elecraft] CW/CW-REV config option

[Brendan Minish]

CW / CW-R can also be a very useful QRM fighting tool. the K3 does not
centre the wider roofing filters on the CW passband to maximise opposite
sideband rejection 
Switching from CW to CW -R (or vice/versa) places that interfering
signal that is above you (in pitch) below you (in pitch) where the lower
skirt of the filter (&roofing filter) may be much more effective at
filtering out the interfering signal. 

This is a great trick if you only have wide roofing filters in your k3,
it's less useful (but sometimes still helpful) even if your K3 is fitted
with narrow roofing filters    
   

-- 
73
Brendan EI6IZ