[Elecraft] KX3 - Pandapter woes

[Buck k4ia]

I am having a devil of a time with my KX3 and NaP3 running through an 
EM0202 outboard soundcard.  It works great with my K3 to an LpPan 
pandapter.

With the KX3, I get a big blip in the middle and mirror images on either 
side that move along with the tuning.  I have tried reversing the I/Q. 
This is telling me there is something wrong with the cables but I have 
switched them out, including the 2.5>3.5 adapter to no avail.  Now, I am 
suspecting the I/Q jack on the KX3 but that seem unlikely.

Anyone have an idea for me to try?

-- 
Buck
k4ia
K3 # 101  KX3 #715