[Elecraft] K3 APF

[Bill W4ZV]

Pete Smith N4ZR wrote:
> 
> 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.
> 

Pete I've had a TS-930S since 1984 (still works great) but I never found its
APF to be of much use.  In fact it became one of several functions (like FM,
AM and RIT) that never got the new worn off in some 12 years of daily use
(FT-1000MP in 1996).  I don't think any of the Kenwood or Icom APFs are in
the same league as the FT-1000's APF.  The 930 definitely did not have the
extremely narrow bandwidth/gain of the latter.  

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).  Will be interested to see if you
have the same opinion after you try APF in the K3.

73,  Bill

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