Re: Best CW Pitch???
Posted by
drewko on
Sep 29, 2007; 8:54pm
URL: http://elecraft.85.s1.nabble.com/Best-CW-Pitch-tp453907p453914.html
On Sat, 29 Sep 2007 12:20:21 -0700, Jim Brown K9YC wrote:
>On Sat, 29 Sep 2007 18:56:26 -0000, Roelof Bakker wrote:
>
>>Two signals 40 Hz apart are much easier seperated at a pitch of 400 Hz than
>>at a pitch of 800 Hz. At 800 Hz the difference is 5%. At 400Hz it is 10 %.
>>This is the way our BSP (biological signal processor) handles it.
>
>Yes, this is very good advice.
>
>Jim Brown K9YC
>
Ok, that makes sense.
Now what about weak signals in noise (no QRM): any idea which pitch is
better there?
And I wonder about keying speed (element length): a shorter element
must carry better at a higher pitch I would think.
Of course, it doesn't matter much if your own ears have a problem with
the theoretical best pitch, i suppose.
73,
Drew
AF2Z
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