[Elecraft] CW Pitch Resolution

[Mike Sanders]

Yeah, and that "sweet spot" changes daily. Sometimes as much as a couple
hundred
cycles.   73

             K0AZ
       Mike Sanders
EM37cd SW Missouri
     www.k0az.com






-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Brian Alsop
Sent: Sunday, October 13, 2013 9:46 AM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] CW Pitch Resolution

Hi John,

I read that article too.  Personally I think it is a lot of bunk. It assumes
perfect hearing.

Where ones sweet spot is depends upon his hearing and hearing degradation.
The closest pitch to 432 Hz is 429.97 Hz on my K3.
Some people's sweet spot may be 700 Hz-- since 432 Hz may be 20 db down from
there!

There was a link somebody posted a year or so ago.  It could be used
determined how much pitch difference one can detect.  For most people is
 >3 Hz.  For piano tuners and musicians with perfect pitch it is likely to
be less.  You can also try using the K3's fine tuning and tune in a carrier.
The increase or decrease the K3's frequency by 3Hz and see if you can detect
any change.

Thus most won't perceive any difference between 429.97 and 432 Hz.
If you can, than congratulations on your perfect pitch.

73 de Brian/K3KO

On 10/13/2013 14:03, John Seney wrote:
> Hi Folks:
>
> The CW pitch resolution in my K3 seems to be 10 Hz per step. A recent 
> article in QST spoke of 432 Hz as being a sweet spot frequency based 
> on musical notes. A quick search on frequencies of real musical notes
shows hardly any are at integer values.
>
> Note -- Freq -- Wavelength
>
> D4	293.66	117.
> D#4/Eb4	311.13	111.
> E4	329.63	105.
> F4	349.23	98.8
> F#4/Gb4	369.99	93.2
> G4	392.00	88.0
> G#4/Ab4	415.30	83.1
> A4	440.00	78.4
> A#4/Bb4	466.16	74.0
> B4	493.88	69.9
> C5	523.25	65.9
> C#5/Db5	554.37	62.2
> D5	587.33	58.7
> D#5/Eb5	622.25	55.4
> E5	659.26	52.3
> F5	698.46	49.4
> F#5/Gb5	739.99	46.6
> G5	783.99	44.0
> G#5/Ab5	830.61	41.5
> A5	880.00	39.2
>
> Could the firmware be changed for experimentation with this or is 
> there an easier way to accomplish it with RIT or filter offsets?
>
> 73
>
> John - WD1V
>
>
>
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