Walt;

You have to tell the K3 to output the 6-meter indicator for the KRC2. Go to the 
KRC2 menu entry on the K3. I believe you then need to tap the '1' button on the 
K3 to have it select the 6-meter selector. The alternative has the K3 select 
the 10 meter selector when tuned to 6 meters. The operation is described in 
recent versions of the K3 manual. 

Once the K3 is set to output the 6 meter selector when tuned to 6 meters, the 
KRC2 will enable the XV1 pins for that band.

Jack Brindle
Elecraft Engineering


Sent from my iPhone

On Jul 28, 2010, at 8:22 PM, "Walter Miller, AJ6T" <[email protected]> wrote:

> 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
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