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
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