[Elecraft] Low receive sensitivity on new K3

[ni0c]

I've completed the initial build of K3
s/n 1061 and am having trouble receiving
anything.  The receiver perks up a lot
when I just connect the center pin of my
coax to the ANT1 jack. It goes dead 
completely as soon as the shield makes
contact with the connector.  
My antenna works fine on my other rigs.

I have the KANT3 module in the K3
(no antenna tuner).

The ANT1 input reads a dead short
with an ohmmeter.   

I have completed the VCO cal,
filter settings and enabling, etc. as 
outlined in the manual.

Any help would be appreciated.
I'm suspecting the trouble is in the
KANT3 module.

73,
Chuck  Guenther  NI0C