I have two KRC2's, one uses the aux-bus line with a K3 and the other
uses the RS232 with a Kenwood TS590sg. The only problems I have had are
all self induced with programing errors!
They both work flawlessly and have for years, one drives a WX0b Six Pak,
the other drives a MFJ RCS-20Lx switch.
Gordon - N1MGO
On 11/19/2020 16:26 PM, Paul Fletcher via Elecraft wrote:
Hi Paul,
I’ve not used it with a radio yet, this was to communicate with a PC to
configure the KRC2 (though the same issue would apply to anything using RS232).
The KRC2 wasn’t responding at all hence the start of fault finding and the
findings I posted. As soon as the resistors were corrected everything worked as
it should without issue.
Hope this helps.
73 Paul M1PAF
On 19 Nov 2020, at 20:52, Paul GACEK via Elecraft <[email protected]>
wrote:
Hi Paul
Thanks for the heads up.
I had some communication issues with my KRC2 in that it worked like a champ
with my K2 but not so with my KX3.
I’m going to crack open my krc2 shortly and see what values I have in those two
resistor locations.
What radio where you using with the KRC2?
Paul
W6PNG/M0SNA
www.nomadic.blog <http://www.nomadic.blog/>
On Nov 19, 2020, at 12:47 PM, Wes <[email protected]
<mailto:[email protected]>> wrote:
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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