[Elecraft] K3 APF

[Lee Buller]

On 11/14/2010 4:23 PM, Bill W4ZV wrote:
> I don't know if you've used the K3's APF yet but it definitely needs very
> careful tuning to work right (i.e. within 5 Hz of a signal peak...and most
> callers don't zero beat me that closely).

YES!  That's exactly what I'm talking about with respect to it being 
difficult for contest operation.

  Jim

The best filter or audio device ever made is between your ears...including your 
ears.  Amazing piece of work.
As I grow older (Rats!), I've had to have some help with digital hearing aids 
and good radios like the K3.  Makes
things easier....but the best filter I've found is your brain!  APF is good, but 
the good CW ops use a lot of
biological filtering.

Lee - K0WA