[Elecraft] KX1 BFO Offset

[Frederick Dwight]

Mike,
        Although I have never measured my KX1, I suspect your measurements are correct.  I usually set my filter setting around 1.5 to 2 KHZ and
use this setting to tune around, for most QSO's, and for all zero beating.  If the going gets tough in a QSO I then turn on the RIT, use a sharper 
setting and use a lower pitch.  If a person prefers to use a sharper filter setting for most operation, possibly a lower offset would be preferable,
however the somewhat marginal opposite sideband rejection would probably be degraded further.  
        I am considering adding an active audio filter possibly with a broad enough response curve to let both 400 and 600 Hz through.  Also under
consideration is a lowpass audio filter. In the past I have build single pole active filters which have improved the audio selectivity without
any apparent detrimental effects to the audio quality.  Hopefully I could squeeze in inside the AGC loop, however it might need to be external.
                       Rick   KL7CW  KX1 #  798   Palmer, Alaska