[Elecraft] K3 APF

[Pete Smith]

I dunno, maybe I'm missing something, but I have always tuned the APF to 
550 Hz, which is where my CW pitch is set, and find it works well 
without tuning.  That's the way my TS-930's APF worked, and I always 
found it very helpful even on moderate strength signals.

73, Pete N4ZR

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On 11/14/2010 1:09 PM, Jim Brown wrote:
> In general, I found the APF to be effective on some signals and a waste
> of time on others.  I also found it tricky to tune in, and thus not as
> effective in contest operation.