Correction to Item 2. I meant to write "A floating *PIN 7* (TX INH) can cause TX to be intermittently inhibited..."
73, Bob, N6TV On Thu, Mar 9, 2017 at 6:50 PM, Bob Wilson, N6TV <[email protected]> wrote: > No TX power is a common problem, especially on DXpeditions. Other than > power supply issues, it is usually one of three things: > > 1. Intending to use the BAND button, one holds down the right MODE > button by mistake, putting the K3 into TX TEST mode. The "TX" icon > flashes. But, since you reported that the TUNE button flashes "0 watts" > instead of flashing "TX TEST", it's probably something else in this case. > 2. CONFIG:TX INH is set to LO=Inh (visible only when CONFIG:TECH MD is > ON). CONFIG:TX INH should be OFF unless you're using a lockout circuit that > depends on the inhibit line. A "floating" pin 10 on the ACC port can cause > TX to be intermittently inhibited when CONFIG:TX INH is set to LO=INh. > When TX is inhibited, the K3 will display "0 Watts" when you press the TUNE > button. The "TX" indicator also flashes when the rig is inhibited, similar > to TX TEST mode. > 3. The most likely cause, which I've seen many times, is that the > jumper board connecting the subreceiver to the main board in the back left > side of the K3 has partially pulled out. This happens almost every time a > K3 is subject to any kind of strong mechanical stress, such as transport in > checked luggage. Make sure the SubRx is firmly seated and the problem > should disappear. If you don't have a SubRx, there's still a jumper board > that must be in place in the same spot. > > 73, > Bob, N6TV > > On Thu, Mar 9, 2017 at 6:38 AM, Dennis <[email protected]> wrote: > >> First thing I did- and the first thing I do whenever I have any funny >> happen- is to cycle power. I did so >> several times. It still wouldn't transmit. >> >> UE >> >> On 3/9/2017 9:00 AM, Ed Muns wrote: >> >>> When it was not transmitting and you were troubleshooting, did you cycle >>> power? >>> >>> 73, >>> Ed W0YK >>> >>> On Mar 9, 2017 5:54 AM, Dennis <[email protected]> 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] >>>> >>> >> ______________________________________________________________ >> 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] >> > > ______________________________________________________________ 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]
