[Elecraft] New KPA500 problem.

[Steve Fox]

In a mild panic here. Need some wise advice. 

Set up my brand new KPA500 and KAT500 today with my K3. Used only Elecraft cables and followed the wiring configuration carefully. Set the K3 for bypass of the internal ATU. All the KPA menu items are set to factory default. 

When I power up the KPA the screen says INVALID.  My limited understanding is that the KPA thinks it is being told to operate outside of its frequency range. But the K3 is set to 80m and well within the band edges. 

My thinking is we have a failure to communicate in that the K3 is not sending the frequency to the KPA, perhaps sending no info at all.

Any thoughts?  I’m assuming I have overlooked a simple setting on the K3 and/or the KPA. 

Tnx and 73

Steve
KA4FOX