[Elecraft] KX3 AFX - Pitch Setting Enhancement ...?

[Wayne Burdick]

Grant,

The KX3's filter center frequency for all features tracks the sidetone pitch exactly. To change the sidetone and filter pitch, just hold the PITCH switch and rotate the knob above it.

If you set PITCH to 500 Hz, for example, then the regular filters, APF (audio peaking filter), CWT (CW tuning aid), manual spot, autospot, and CW decode will all be centered at 500 Hz. 

Regarding your *exact* question (I think): all of the AFX features should also be centered at the selected PITCH. The only exception is if you have a wide filter passband selected. For example, if your PITCH is 500 Hz and you have a filter WIDTH of something greater than about 1000 Hz, then the passband center starts shifting higher. The lower edge of the filter remains near zero beat + 100 Hz to ensure good opposite-sideband rejection at all WIDTH settings.

73,
Wayne
N6KR

> On Aug 4, 2018, at 12:46 PM, Grant Youngman <ghyoungman at gmail.com> wrote:
> 
> One of the reasons I never use this setting is that it seems to be a fixed 700 Hz +/- as “center” in the sound field.  I much prefer CW closer to 500 Hz, which always ends up putting the tuned signal in my left ear with this option (and no I’m not terribly hard of hearing in this frequency range).
> 
> Have I missed another setting option somewhere?  If not, it would be a worthwhile KX3 (and K3?) enhancement to have the AFX Pitch “center” follow the CW Pitch setting of the radio to actually make this function useful.
> 
> The CW Binaural option on the TT Orion opened up a very spacious left-right soundstage that made it easy to copy a “centered” CW signal in crowded band conditions even at wider filter settings. You could literally point to every signal … 
> 
> My K3 isn’t hooked up right now (shack is currently a table on my patio), so I’m not sure if it behaves the same way.  In any case redoing the AFX Pitch algorithm would be a very worthwhile enhancement.
> 
> Grant NQ5T
> K3 #2091 KX3 #8342
> 
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