[Elecraft] K3 s/n 1061 build glitches

[ni0c]

The trouble I reported yesterday (low receive sensitivity 
with coax shield connected) disappeared after I performed 
the Tx gain calibration procedure (at low power).

So I installed the KPA3 100 watt amplifier module, but now
the rig shuts down completely if I key it at any power level
requiring the KPA3 (i.e. above 12 watts).  It does this with 
two different well matched antennas and with a 50 ohm 
dummy load. 

73,
Chuck  NI0C