[Elecraft] K3 - Sensitivity on 10 Meters

[Wayne Burdick]

Hi Dave,

Our PR10 preamp module has an MDS in the -143 to -144 range on 10  
meters. It doesn't get much better than that on any ham transceiver.  
(Using it with a K3 requires a KXV3 or KXV3A module as well, since it  
gets patched through the RX ANT IN/OUT jacks.)

The stock MDS of the K3 on 10 meters is typically -136 dBm. This is  
consistent with a radio optimized for very high dynamic range.

73,
Wayne
N6KR


On Oct 1, 2012, at 2:13 PM, Dave Hachadorian wrote:

> During the CQWW RTTY Contest this past weekend, I got the feeling
> that the K3 receiver could have used some additional RF gain.  I
> was using the 250 Hz filter with +4 dB of I.F. gain dialed in.
> Switching the preamp on and off produced just a barely
> perceptible change in the background noise.  I seem to remember a
> previous discussion about the need for a ten-meter preamp, but
> haven't heard any more about it.  Has anyone done a test to see
> if the minimum detectable signal is up to snuff on 10?
>
> Fifteen meters was better, but still less than what I expected
> when switching the preamp in and out.
>
> Dave Hachadorian, K6LL
> Yuma, Arizona
>
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