Hello Jim,
I've owned my 746PRO for about 3 years, and my K2/100 S/N 3039 w/ all
options for a little over 2 years, so I feel qualified to render an
opinion here. I'll start by saying that although the 746PRO is a nice
rig, it's no match for the K2 for CW, which is my primary mode of
operation. For that reason, the K2 has been my primary rig ever since I
built it, and I pretty much keep the 746PRO around for use as a
reference for frequency accuracy, and as a monitor when testing things,
such as mod's to the KSB2, or more recently, to monitor the output of
the XV144 transverter.
As for the K2, I had always been a fan of the KAF2, but, IMHO the
versatility of the KDSP2 makes it a much more useful option. The NR
performance of the KDSP2 is better than that of the 746PRO, plus it is
more configurable. The DSP bandpass filtering of the KDSP2 is very good
as well, and I use it at times, but my primary usage of the KDSP2 is for
noise reduction, at which it excels. Although the high 'Q' of the KAF2's
filter provides a very nice peaking effect, the KDSP2 filter, when
adjusted for a 50Hz bandwidth, sounds very similar. Plus, you have the
option of selecting a 'softer' filtering algorithm, which I particularly
like with the narrower bandwidth settings.
So, in my opinion, the KDSP2 offers far more performance and
versatility, and is worth the extra money.
73, Dale WA8SRA
Jim Harris wrote:
... My question today is how much difference is there in
performance between the KDSP2 and the KAF2? Is the
KDSP2 worth the extra $140? I'm been using an
IC-746pro for about a year and a half so I am familiar
with the use of a DSP.
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