[Elecraft] 6m birdies and K3S and/or new synth boards

[Ken_ke2n via Elecraft]

My K3 with the new synth (and upgraded DSP board) has an unfortunate "birdy"
on 50.276 (unfortunate because this is the JT65 calling frequency in the
US).  I know it is a DSP-type artifact because the pitch of the birdy
changes with the IF Shift control.  The IF shift control does not change the
frequency of the signal, just the birdy. This phenomenon is actually useful.
By shifting the center frequency to 1.35 kHz I can move the spur down to
zero beat. And, like all spurs, the pitch of the spur changes a lot faster
than the tuning rate of the radio. The pitch of the spur also varies with
the setting of the crystal filter offset (mine is set at 200 Hz).



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73
Ken

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