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 >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> <http://mailman.qth.net/mailman/listinfo/elecraft> >> Help: http://mailman.qth.net/mmfaq.htm <http://mailman.qth.net/mmfaq.htm> >> Post: mailto:[email protected] <mailto:[email protected]> >> >> This list hosted by: http://www.qsl.net <http://www.qsl.net/> >> Please help support this email list: http://www.qsl.net/donate.html >> <http://www.qsl.net/donate.html> >> Message delivered to [email protected] <mailto:[email protected]> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
