Just to add a little info, I measured and compared my KX3-SN475 to my
K3-SN4043:
http://www.kl7uw.com/HF.htm Half-way down the page.
KX3 on 6m with preamp on was -127 dBm with 2.8-KHz SSB*
K3 on 6m with ARR Gasfet preamp was -137 dBm*
on 10m the K3+PRE outperformed the KX3, as well
Subsequent
Wayne,
Have a KX3 here and use the Rx I/Q Ports with external SDR
receiver and applications need I/Q outputs with an HF 3dB splitter with a DXE
RTR-1A
DXE box with Protection from overload Rx protection
Noticed poor sensitivity due to the High NF when taking output from Rx I/Q at
the
Wayne Burdick writes:
If the signals exceed a certain threshold, firmware will automatically
turn off the preamp.
I generally operate in a fairly low noise environment and little strong
signal interference. Still, it is nice to learn the KX2 has such
safeguards built in, especially
Occasionally we have a KX2 or KX3 user claim their rig has low receive
sensitivity. Often this is simply because the preamp is turned off.
These users may be used to superhet receivers like the one in the K3/K3S, where
preamp-off sensitivity (MDS) is typically in the -130 dBm range (or
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