[Elecraft] KAT2/K2 weird fault

[W3FPR]

Ian,

It would seem that a full reset may be needed.
BUT - before you do that, record ALL the menu settings.  There are 
instructions in the K2ATOB instruction sheet with places to record the 
settings - download if necessary.
After the reset, you will have to reenter the settings, and do a CAL PLL 
and CAL FIL to get everything back to normal.  That also means you will 
need the internal frequency counter cable.  I believe you can order that 
kit from Elecraft if you do not have one already.

73,
Don W3FPR

On 12/6/2025 10:47 AM, Ian Liston-Smith via Elecraft wrote:
>   I have a K2 s/n 7469 with 160m and 60m boards. No PA fitted. The K2 has been working fine on all bands Rx/Tx until I fitted the KAT2 ATU. I now have no TX on 60, 40, 30 and no RX on 60 and 40. I have removed the KAT2 and the faults remain.
>
> Any suggestions? Has the CPU got screwed up and a factory reset needed? Advice please before I do that.
>
> Many thanks,
>
> Ian, G4JQT
>