Re: APF For K3
Posted by
Jim Brown-10 on
Oct 25, 2010; 9:17pm
URL: http://elecraft.85.s1.nabble.com/APF-For-K3-tp5671688p5672426.html
On 10/25/2010 12:29 PM, Merv Schweigert wrote:
> but never found them useful for CW. The filter in my head always seems better at picking out the desired signal than the audio filter
That's usually been my experience too, primarily because the skirts ring
on QRN, and the narrower the filter, the closer those skirts get to the
CW note. The closer the ringing is to the CW note, the harder it is for
the ear/brain to separate them. This is pretty well known by scientists
working in the psychoacoustic world.
73, Jim K9YC
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