[Elecraft] Kx3 RxIQ

[Edward R Cole]

K3 IF output is simply the 1st IF=8.215 MHz which is simple RF 
covering a wide bandwidth.  Simple way to generate IQ baseband audio 
is with any of the inexpensive SDR's.  I use the LP-Pan which was 
specifically designed for the K3 IF.  the LP-Pan has a input 
bandwidth of about 400-KHz.  I use either a emu-0202 which can 
support 192-KHz or a Delta44 which supports 90-KHz audio.

Elecraft responded to customer desires and included IQ baseband 
output for the KX3, so one only needs a decent audio interface to a 
soundcard.  You can make one yourself.  Its on my lengthy "to-do" list.

73, Ed - KL7UW



To: Barry LaZar <k3ndm at comcast.net>
Cc: "<elecraft at mailman.qth.net>" <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] Kx3 RxIQ
Message-ID:
         <CAME0jBTBGuXzumN3OJM2XXuiUbMo3__jci84S_hGtCdoKiv-bA at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Thanks Barry, that explanation helps alot.  So I'm assuming that the
IF output of the K3 is a very traditional IF as in other radios, ie
it's not Quadrature, etc.  Would that be correct?

If so, another approach would be to feed into an A/D, and then do the
rest in software, ie gnuradio.  I wouldn't be surprised to find out
that gnuradio already supports similar configurations, including down
converting (for certain), splitting and creating the quadrature output
(unknown).  Sounds like a fun project.  Wish I had time to pursue it!!
;)

If I'm reading the block diagram correctly, it looks like an 8.125 MHz IF.

-Chris



73, Ed - KL7UW
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