When testing my KX3 next to my K3 in a transverter setup, I found that
the KX3 seemed a bit "deaf".
On the K3 I need to operate the attenuator, but on the KX3 I needed to
enable the preamp instead and even then, there is very little AGC with
the signals on the band.
To verify, I did FM SINAD measurements and found that on 10m, the K# has
-113dBm for 12dB SINAD (which is normal), but the KX3 needed -101dBm for
12 dB SINAD, so indeed, it seems "deaf".
I removed the transverter option, filter option and the antenna tuner
option but that did not improve things.
RF output is nominal.
I verified the attenuator as wel as the two pre-amplifiers (10dB and
20dB) and they seem to do what they need to do.
I suspect an issue in the TX/RX circuitry and perhaps someone else has
encountered this, or perhaps this is one of the "that is a known
problem, change these components" from one of the Elecraft techs?
Has anyone seen this?
73,
Geert Jan PE1HZG
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