The going back to the "last saved" frequency is a dead giveaway that the power has been EXTERNALLY removed or glitched without the benefit of manual power off (which allows K3 to go through all its "save stuff" shutdown routines). This will bring you up on the previous frequency. If the previous operation was a different mode, it will go to that mode as well.
Don't let the lack of an obvious connection to RIT off get you onto a tangent. Fix the problem with the power wiring or power supply and see what is left afterwards. You may never be able to explain why it happened with RIT. I could guess that turning on RIT causes a spike of K3 CPU power consumption to do all the processing crap needed to turn on RIT, and is the straw that broke the camel's back. But I don't know that, and it doesn't matter. The power problem could be those power pins (that are now gold anodized) going bad. You can read about that problem on the Elecraft site. 73, Guy. On Sun, Aug 14, 2011 at 9:39 PM, Lou Kolb <[email protected]> wrote: > I'm having a similar problem with k3 4290. I have qrq mode turned on but > when I engage the RIT which turns QRQ mode off and then transmit, the rig > shuts down. It also comes back on a different frequency when I power it > back up. If I leave the RIT off, it doesn't happen. I thought it might be > firmware related and had been meaning to reinstall version 436. Then, 439 > was released so I just upgraded to it figuring that might solve the problem > but no joy. I'm at a loss to explain this so any thoughts would be welcome. > Thanks. lou WA3MIX > ----- Original Message ----- > From: "K4SC" <[email protected]> > To: <[email protected]> > Sent: Sunday, August 14, 2011 8:45 PM > Subject: [Elecraft] K3 abruptly shuts off during CW transmission > > >> After nearly two years of trouble free operation, I have developed a >> repeatable problem. While transmitting on 40 meter CW on my usual antenna >> the K3 suddenly shuts down. When I repower it, it comes back up fine, but >> has shifted frequency by about 1.5 kHz. This is occuring during >> relatively >> short transmissions. Power was at 100 watts and swr was about 1.5:1. I >> tried turning power down to 75 watts and it repeated. I then switched to >> a >> dummy load and it happens again; as I said it is definitely repeatable. I >> even updated the firmware, no joy! Any thoughts. I operated cw mostly so >> I >> can't say if this is also occuring on SSB. >> >> Thanks, Chuck K4SC South Carolina >> >> -- >> View this message in context: >> http://elecraft.365791.n2.nabble.com/K3-abruptly-shuts-off-during-CW-transmission-tp6685970p6685970.html >> Sent from the Elecraft mailing list archive at Nabble.com. >> ______________________________________________________________ >> 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 > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
