[Elecraft] [KX3] ADC/DAC access, keyer input

[Tony Estep]

On Fri, Aug 19, 2011 at 8:10 AM, gmaxwell <gmaxwell at gmail.com> wrote:

>
> ...Why not simply make a USB connection available that gives an
> external SDR access to the IF...

=========
IF output connected over USB? Maybe you mean a BNC, as is found on the back
of the K3. Like many others on this list, I feed the IF output from that
into an external SDR (I'm using LP-Pan, but I also have tried a Flex 1500
and a Softrock). Of course, that too requires a sound card after the
down-conversion done by the SDR. Those of us who have been using this setup
are excited about getting direct I-Q output from the receiver.

There's zero to be gained by having an outboard SDR box that would duplicate
the down-conversion circuits in the KX3. My bet is that Elecraft would do a
better job with that circuitry than today's SDR makers. And the output of
that goes to a sound card anyway, whether it's inside your SDR or in a
separate box or in your computer. The sound-card circuitry inside today's
commercially available SDRs is nothing special and in many cases is no
better than what's already inside your computer.

Tony KT0NY


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