[Elecraft] K4 Noise Blanking & Sensitivity - Again

[Wayne Burdick]

Yes. Historically a significant percentage of our K2 and K3 buyers chose the QRP model. In some cases operators use the radio as an IF for transverters, etc.

73,
Wayne
N6KR



> On May 29, 2019, at 4:15 AM, John Stengrevics <jstengrevics at comcast.net> wrote:
> 
> Hi Wayne & Eric,
> 
> I’ve asked this question twice already with no answer.  Perhaps it’s the way I phrased it.  So, let me ask it a different way:
> 
> 1.  Noise Blanking:  On the website, under K4 FAQ - Performance Differences, it says "In a direct-sampling radio like the K4, the DSP can “see” a wider bandwidth in its signal chain, allowing it to provide higher-performance noise reduction, noise blanking…”  Can you quantify the improvement of the K4 over the K3S regarding noise reduction and noise blanking?
> 
> 2.  Sensitivity:  Rob Sherwood’s transceiver test data shows the following sensitivity for the K3S (in microvolts):
> 
> 0.27
> 0.20b <http://www.sherweng.com/table.html#key>
> 0.0810 <http://www.sherweng.com/table.html#key>
> 
> b  Built-in preamp actuated
> 10   10 meter data, preamp ON
> 
> How does the K4 compare with the K3S on this measure of sensitivity?  
> 
> 
> Thanks in advance.
> 
> John
> WA1EAZ
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