[Elecraft] [K3] KXV3A fails 1 mW calibration

[Pierfrancesco Caci]

I get the following error when trying the 1 mW calibration for a freshly
installed KXV3A:

Starting 1 milliwatt calibration.
Calibrating at 1.900 MHz
IsSamplingComplete: Unexpected response 'DB 0.10 MW;' to ''. State 220
Calibration power settled at ' 0.10 MW;'
1 milliwatt calibration failed.
Elapsed time: 19.2 secs

K3util is 1.4.1.8 for linux. 

The dummy load is a tiny 50 ohm one directly made out of a bnc. I've
measured it at 51.8 ohm which, given that the reading with the probes
shorted is 1.5, is as close as I can get. Another bigger dummy with some
adapters and short cables gives the same error. I'd tend to rule out the
dummy load as the culprit. 

Ideas?

Pf

-- 
Pierfrancesco Caci, ik5pvx