[Elecraft] KX3 direct conversion system

[Wayne Burdick]

須崎 純 (Jun) wrote:

> I built KX3 kit (S/N830) up last week after fixing some errors.
> As soon as trying some functions, I found it's really a direct
> conversion system.  A weak leaked signal was observed with another
> receiver just on the watching frequency.

You can reduce the KX3's VFO signal leakage to another receiver nearby  
by setting MENU:RX ISO to ON.

Yes, it is similar to direct conversion, except that there are two  
channels (I and Q, like other SDRs), allowing for image rejection. The  
KX3 uses this architecture rather than superhet to provide the SDR  
feature, as well as to reduce the number of stages, allowing the unit  
to be very compact.

73,
Wayne
N6KR