[Elecraft] [K3] APF and Pitch

[Ken G Kopp]

I operate almost exclusively CW and my APF is never turned off.
I use a 400 Hz filter, BW set at @350 Hz, and a pitch setting of
440 Hz.

FWIW, I hear -no- "ringing".

73!

Ken - K0PP


On Sun, May 12, 2013 at 8:25 AM, Pierfrancesco Caci <pf at tippete.net> wrote:

>
> Someone mentioned that APF rings less when pitch tone is set to 440 Hz
> instead of 800 Hz. So, I'm trying and it indeed seems to ring less.
> Anyone else hearing this?
> Is this some DSP effect or a psychoacustic effect?
>
> Condition of test:
> 200Hz 5-pole filter
> DSP BW 50Hz
> RF gain backed so that signal is barely audible with no APF
> RX Audio EQ bands 4 and 5 set to 0, all rest down -6
>
> Pf
>
> --
> Pierfrancesco Caci, ik5pvx
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