Howdy Gang:
While surfing the Elecraft webpage I watched some of the videos about the new
KX3 and got to wondering (in between drooling---grin).
Could the KX3 architecture (SDR with knobs/front panel) be a precursor of
things to come in the form of a full-size K4???
OK, like I said, just
I was under the impression that the K3 is already what you are describing.
NE4W
On 12/6/2011 7:50 PM, Joseph Trombino, Jr wrote:
Could the KX3 architecture (SDR with knobs/front panel) be a precursor of
things to come in the form of a full-size K4???
Howdy Gang:
Perhaps I should have made my previous comment regarding the KX3 and my
daydream K4 a bit clearer.
I should have been more specific in terms of the QSD (quadrature sampling
detector) architecture of the KX3 as related to my day dream K4.
While the K3 is controlled via firmware
I agree, Joe. The direct conversion (RF to baseband) architecture has been
around since the earliest days of radio for a reason. The superheterodyne
format using intermediate frequencies offered selectivity that wasn't
available in the past but at a cost: spurious responses and very sensitive
gain
But modern techniques now provide the selectivity needed without the
superheterodyne format with all of its issues. The quadrature sampling
detector is one of those.
The quadrature sampling detector is a large step backward from the
current IF sampling in the K3. I have always felt QSD as
Superhets also allowed the considerable receive path gain
needed to not be all at signal (RF) or AF.
Also, the KX3, while using quadrature techniques,
definitely does NOT use a sampling detector.
73,
Lyle KK7P/7 (Tucson AZ)
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