[Elecraft] KRC2 silkscreen gotcha

[Wes]

Thanks.  I've owned one of these for years and as I recall, it's always been a 
problem so it's been resigned to the junk box.

Maybe I can resurrect it to make it useful for something.

Wes  N7WS

On 11/19/2020 12:58 PM, Paul Fletcher via Elecraft wrote:
> FAO anyone who's had issues getting the serial comms working on a KRC2:
>
> R12 and R13 are transposed on the silkscreen on the PCB. I fell foul of this
> when I recently built my KRC2 and it wouldn't communicate. After quick probe
> around it was evident there was no negative voltage to the RS232 driver, U2.
> A little further probing revealed no 12V present at R13 but there was at
> R12. It was then I realised the component layout in the manual is different
> to that marked on the PCB. A quick swap of resistors and everything works as
> it should.
>
> I've re-read the errata and the manual and there is no reference to this
> issue. Apologies if it's been flagged up on here already but I couldn't find
> anyone pointing this out though there do seem to be a few people with serial
> comms issues with the KRC2.
>
> Hopefully this is of assistance to someone.
>
> 73 Paul M1PAF