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]
