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 > On Nov 19, 2020, at 12:47 PM, Wes <[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 > 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]
