I work mostly CW weak signal and have not heard ringing with the K3 ..
Now I will say if you have your tones "CW Pitch" set at 800 Hz + or - it
may sound like ringing to you , you might try lowering the CW Pitch say
around 600 Hz or even lower
Ed N5DG
On 5/10/2013 7:36 PM, Matt Zilmer wrote:
I should have mentioned that APF is set the way it's set. I don't
believe any parameters exist to change APF's operation. Someone may
correct me on this.
APF is best used with a narrow bandwidth setting. I think I saw the
figure 30 Hz (for -6dB points) used in conjunction with APF, so a 50
or 100 Hz filter setting seems in order. That's what I use here.
73,
matt W6NIA
On Fri, 10 May 2013 17:33:35 -0700, you wrote:
Best used when copy any other way is impossible due to a weak signal.
Ringing is somewhat better than noise, isn't it?
I've found APF useful in a number of QRP events, when handling weak
signals is the order of the day. Yes - copy may be dificult but at
least you have something to work with. APF is similar to Q-mulipliers
we used in the 70's and earlier, prior to digital signal processing.
By memory, the K3's (and KX3's) APF is an order of magnitude better
than a Qmult. Imho, it is mainly due to the excellent DSP work by
Lyle Johnson. Of course, some of the difference is also due to the
relatively poor receivers we had back then.
73,
matt W6NIA
On Fri, 10 May 2013 23:46:24 +0000, you wrote:
As a 98% cw operator, I've explored the various K3 weak signal features.
I tend to shy away from the APF because its ringing seems to my ears to
be counter productive. Any advice/experience on how to set up and use
this feature for best results? Thanks.
...robert
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