*Hi all* * * *I have K3 serial number 2307 which is fully loaded except for the 2m module, but recently it's beginning to give me some issues, I previously had ERR VC0 errors a few years back but cured this problem with the official K3 Synthesizer ALC Modification<http://www.elecraft.com/K3/mods/ELECRAFT_Application_Note_KSYN3_ALC_Rev_A.pdf> .*
*Problem 1 ..* *Recently I have been having similar problems, when the radio was getting warm tuning the VFO would cause lots of crackling noise on the band, then if I tried to complete **VCO Calibration it would complete very quickly and I would get the following errors **E 00005 ERR VC0 ... **E 00255 ERR VC4.* * * *So I removed both the K3SYNTH boards, checked for dry joins etc but nothing was found, so I decided to put the ** K3SYNTH boards back in the radio the opposite way with the board causing the issue in the 2nd RX position and the later ** K3SYNTH board in the main VFO position* * * *So all seemed well for 3 days but then the problem arose again, but this time when the radio is cold t**uning the VFO would cause lots of crackling noise on the band, then if I tried to complete **VCO Calibration it would complete very quickly and I would get the following errors **E 00013 ERR VC0* * * *So this is the other K3SYNTH board in the main VFO position and it's causing the same issue but when the radio is cold.* * * * * *Problem 2 ....* *I was having a QSO with a local on USB when my TX signal suddenly stepped down the band about 1.5khz, after much a do we finally realized what was happening and the local ham was having to receive my with his RIT on, I checked out my signal and sure enough I was 1.5khz low ?? how could this be?* * * *So I tried everything I could think of including re flashing the firmware but still the same problem exists, so i tried CW, all was fine, this is strange, after around an hour of trying various things I turned off ESSB mode and bam, the USB signal came back onto the same frequency as the RX, oh this is strange ??* * * *So i switched ESSB on again and the TX signal stepped down 1.5khz again .. * * * *So that's where we are at the moment, I still have both the above issues with no apparent answers ????* * * *All help appreciated.* * * *Jim M0CKE* ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
