The Rob Sherwood chart is sorted by narrow spaced dynamic range (second last 
column). K3S is at 107dB, KX is at 104dB, and K2 appears twice, 80dB for the 
new model and 70dB for the older model. I presume if you apply the mod kits to 
an older model K2, it will bring the performance up near where the newer K2s 
sit.

Rob mentioned in one of his presentations that for CW you need a better 
receiver that for SSB, and that ideally you want at least 80dB narrow-spaced 
dynamic range when working weak CW stations in crowded contest conditions with 
strong stations nearby. An up-to-date K2 meets this criteria, but the FT991 is 
quite a but further down the chart at 71dB. Don’t know where this Icom IC7300 
will fit in, but I think, like the Flex radios, it is a direct-sampling SDR 
architecture, and it will be very interesting to see where it ends up.

-- 
73 de Matt VK2RQ

Le 4 septembre 2015 à 12:59:38 AM, Phil Wheeler ([email protected]) a écrit:

All three are on this Rob Sherwood chart, Curt:  
http://www.sherweng.com/table.html  

73, Phil W7OX  

On 9/3/15 6:19 AM, Curt wrote:  
> I hadn't been paying too much attention, guess  
> the K3 has been replaced by the K3S. Owning a  
> K2/100, am thinking about an "upgrade". Is  
> there a simple chart comparing the attributes of  
> these three radios? Looking at the receiver  
> comparison charts on Elecraft site, am not  
> seeing the KX3 listed.  
>  
> 72, Curt KB5JO  

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