[Elecraft] K3 10-meter sensitivity

[Alexander Ponomarenko]

GE Tony.

1. The K3's sensitivity in manufacturer's specifications for BW=500Hz is 
equal to -136dBm.
If we will recalculate sensitivity for SSB BW=2800Hz we will see only 
-128dbm.

2. If we will see measurements from ARRL Lab for K3 and ProIII (for 
example), we will see that ProIII has better noise floor (MDS):
for 14MHz -141dBm for ProIII (PreAmp2=On) and -138 for K3 (PreAmp=On)
for 50MHz -142dBm for ProII (PreAmp2=On) and -136 for K3 (PreAmp=On)

For 28MHz we don't have the results from ARRL. :(

73!
Alex UR5LAM

Tony - KM0O пишет:
> Yesterday, in the 10-meter contest, I noticed that some other stations (using
> comparable antennas) within a very few miles of me were working stations
> that I could barely detect, or not even hear, on my K3. In itself that is
> not too unusual, but I had another radio in the shack, a Yaesu FT-900, so I
> connected it to the K3 for some comparative receiver testing.
>
> What I discovered was rather disappointing. About half the time, there
> seemed to be no difference in the ability of the two receivers to pick out
> very weak signals at or near noise level. The other half of the time, the
> old FT-900 seemed just a bit better. NEVER was the K3 better at digging out
> the weak ones.
>
> What are other people's impressions of the K3's sensitivity on 10 meters?
> This is a K3 that was in Aptos a few months ago and came back "within spec".
> Does the K3's 6-meter sensitivity problem extend down to 10 meters?
> Comments, anyone?
>
> 73,
> Tony
> KM0O
>   
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