I had something somewhat similar happen and the best I could tell it was related to power supply issues. Now I use thicker wire direct from the power supply to the K3 and it so far seems to be working better.
An advertised way to fix it is to re-load the firmware and recalibrate the transmit power. From: Elecraft [mailto:[email protected]] On Behalf Of Dennis Sent: Thursday, March 9, 2017 6:41 AM To: Jim Stahl <[email protected]> Cc: Reflector Elecraft <[email protected]> Subject: Re: [Elecraft] K3 Stops Transmitting I did try the "drop" test- hold up the front of the radio a little bit, and then drop it so that it contacts the table. Kinda shake things up a bit. No luck. When I also brought it home, I put it in the case, drove it 72 miles back to my house, brought it in, and set it up 2 days later. So it was jostled fairly good. As I say, when I got it home it worked, and has worked, fine. Dennis W1UE On 3/9/2017 9:10 AM, Jim Stahl wrote: > I had a similar event last October in the New York QSO Party with my K3, > s/n67xx. After the first QSO (from a beautiful overlook in Fort Tryon Park in > Manhattan) it simply stopped putting out RF. It went into transmit, just no > RF. I tried power cycling, jiggling external connectors, etc. After about 10 > minutes, and about one minute before giving up for the contest, while moving > things around I unintentionally snapped the front bail, and things snapped > back to life. > > It has worked fine ever since. > > > 73 - Jim K8MR > > >> On Mar 9, 2017, at 8:54 AM, Dennis >> <[email protected]><mailto:[email protected]%3e> wrote: >> >> In the middle of ARRL DX CW, my K3 stopped transmitting. It did not shut >> off, it >> would go into transmit and there were small flickers in ALC when the meter >> was in >> that position, but no power out. Pushing the TUNE button resulted in the >> display >> saying "0 watts". I played with it for several minutes, was unsuccessful in >> restoring >> any transmit capability, so subbed in the replacement rig and kept going. >> >> I brought my K3 home, plugged it in, connected a key and a dummy load, and it >> transmitted perfectly. No problems. I've used it about 3 hours since, and >> there >> have been no problems. >> >> First question, what could have happened to result in the no transmit state? >> I will be using my K3 again this weekend in a contest. If the problem >> happens again, what possible problems should I be looking for? Loose/ >> intermittent cable attached to the synthesizer? >> >> Dennis W1UE >> ______________________________________________________________ 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]<mailto:[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]
