[Elecraft] K3:New APF what happened?

[Chuck Guenther]

The new APF continues to please this CW operator.
Like others, I find it works better in some situations than others.
But I would not have been able to copy and work RI1FJ
(Franz Josef Land) on 160m the morning of November 8
without this new tool.

A few suggestions for using it:

1. Make sure the CW signal is centered in the passband at your
selected pitch, before engaging APF.  For very weak signals,
I always rely on my ear to match the pitch, rather than using the K3
SPOT or CWT features.

2. After turning APF on, use the APF SHIFT (now 5 Hz resolution)
and/or FINE tuning (1 Hz resolution) to peak the signal.

3. I've mentioned this before, but I use a Macro to turn on APF,FINE,
and RIT with one button push (and another Macro to turn off all these
functions).

73,
Chuck  NI0C
K3 s/n 1061



Larry, K2GN, wrote:


"Yes, it helps on some signals but not on others.
In fact, due to the "ringing" or hollow sound, the weak signal is better
copy with normal operations. If have I/II so I can switch back and forth
quickly.
I use the 400 narrow filter.  NR,NB, etc off.
Anybody have any suggestions that can bring this station up to what others
are reporting that they experience?"