It's not a complete answer, but treat the K3 like it's a computer. Always turn it off with its own power button so it can go through its shutdown procedures and turn itself off after all the data is cleaned up or stored properly. Only turn on the K3 when the power is up and stable. A PC power supply has circuitry to assure stability by communicating with the motherboard.
Turning the K3 on or off from the power supply switch is like turning a PC on/off by pushing/pulling the power plug at the motherboard. Also make sure the power supply voltage is not sagging during transmit. One person I know was going from 12 to 9 volts key down at 100 watts. Problems with the wire, the connectors and the power supply. Previous poster referenced RFI in the shack which can generate baffling symptoms that make no sense. Good luck sorting it all out. 73, Guy K2AV On Sunday, April 10, 2016, Tom SQ5CSF <[email protected]> wrote: > Hello everybody, > I have a strange issues in my K3. Maybe someone has had similar symptoms > and may help me... > > chronology of my actions with K3 > > - from the begining K3 was never opened, worked fine. > - 2015-06 - KXV3 installation > - 144 QSO made in this period time - no issues. > - 2015-12-31 Last firmware upgrade (5.38/1.25/2.86) > - 26 QSO made in this period time - in January - no issues > - SPDX contest (2016-04-02)- in my contest location - first operational > problems. > During the contest I have made about 40 qso. > Many radio restart have been made to be able to work at all... > symptoms: when I have pressed mic's PTT, TX led switch ON but there were > no power output. > The same situation was when I have used footswitch or playback message > option. > After few pressing of the PTT output power appeared. > > Next point was the AUT - time of the tuning was tottaly differen between > next tunes. > Next point - AF gain controls for main receiver. > Radio was not reading the knob position to change the volume. > Band change removed this issue for some time. > > > - Home station - 2016-04-10 > Previous problems disappear, now i have a problem with the K3 power off. > It's look like not complete internal procedure. > whole firmwares were reloaded - issues still exist. > configuration was restored from 2015-08 - issues still exist. > Older firmwares were downloaded - issues still exist. > Actual firmwares were downloaded with last saved configuration - issues > still exist. > - next point - when I switch on my Diamond power supply - K3 power on > automatically. > > > Some shots made by mobile You can have a look on vimeo: > https://vimeo.com/162290764 > > I will be grateful for any comments / tips > Tom > SQ5CSF > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] <javascript:;> > > 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] <javascript:;> > -- Sent via Gmail Mobile on my iPhone ______________________________________________________________ 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]
