[Elecraft] [KX3] I.F. Structure similar to k3??

Edward R. Cole kl7uw at acsalaska.net
Wed Feb 29 16:20:23 EST 2012


To put in slightly different terms:

The KX3 is a direct conversion radio and has no IF (intermediate 
frequency).  e.g.  If you tune 14.305 USB, that signal mixes with the 
VFO=14.305 MHz.  The result is audio.

But this is a SDR so more accurately the output is (approx) 3KHz 
baseband audio in two streams phase shifted 90 degrees apart (the "I 
and Q signals" which go to a A/D and are digitally demodulated by the 
internal DSP processor).  This same IQ baseband is available for 
export to a stereo soundcard for those wanting to run soundcard 
programs (like psk-31, SSTV, or WSPR, etc.) on a computer.

ergo no IF.  I suppose you were wanting to connect to a P3?  I 
believe the Elecraft folks have something planned to accomplish that 
with a KX3 (your turn to comment, Wayne or Eric).


73, Ed - KL7UW, WD2XSH/45
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