[Elecraft] KRC2 Decoder Problem

[Walter Miller, AJ6T]

I recently assembled a KRC2 decoder for use with my K3, and I cannot get 
it to decode the 6-meter band.   Unfortunately, almost all of the 
Elecraft documentation is oriented toward use of the KRC2 with the K2 
rather than the K3.  My PIC is labeled "KRC2 1.5" (so it has the version 
1.5 firmware code that is supposed to work with the K3), and the 
Elecraft KRC2 Download Utility V1.1 returns "KRC2 V1.5;" when the GET 
F/W REV button is clicked.  From what I have read on earlier posts to 
this forum, the XV1 terminal should go to 12 volts when the K3 is on the 
6-meter band, but it remains at zero volts (the 160 through 10 meter 
outputs do go high correctly as the K3 is tuned from band to band).

I have also seen mention of version 1.6 firmware for the KRC2 on other 
posts, but I can't find that on the Elecraft web site.  Is there really 
a version 1.6?

So, what is the trick to make the KRC2 work correctly with a K3 on 6 
meters, and how should it play when I install the K144XV 2-meter option?

Walt, AJ6T