Well first I’d try with a “dummy” load. The swap antenna to Ant 1.
Sent from my iPhone ...nr4c. bill > On Apr 12, 2020, at 3:23 PM, Ben Gelb <[email protected]> wrote: > > A bit of a mystery w/ my K3S and I could use help figuring out what the > problem might be. > > Background: I have had the radio parked on 6m for several weeks (HF antenna > temporarily out of commission) and have left it running (receive) for > extended periods. > > Recently, I have noticed that when I do sit down and try to operate, the > radio will get into a mode where during TX the rig will indicate 0W forward > power during transmit. Following this zero power TX, the RX will also go > quiet. Then seems to stay that way for some time (not clear to me what > makes it clear up... or if it ever does if left alone). > > Some experiments I have done to try to figure out what is wrong: > - Hitting the tune button also shows 0 power (instead of usual 10-15W) when > radio gets stuck in this state. > - Dialing the power down to where I hear the 100W PA switch out of line > (relay click... around 8.0W) seems to immediate restore receive and also > causes the rig to make power again on transmit. But when I turn it back > past 8.0W, it appears to go back right back into the bad state (so suggests > whatever the issue is, is in the 100W PA module). > - Switching to another band and transmitting momentarily (think I tried > 15m) will sometimes knock the radio out of this "bad" mode. But going back > to 6 meters will eventually cause it to happen again. Usually pretty > quickly (several seconds of TX). > > Some other notes: > - Antenna always measures 1.1:1 on the K3S display (when TX working > correctly). Also checked w/ RigExpert. I don't think the antenna is the > issue. > - All my observations have only really been on ANT2 port (nothing connected > to ANT1 presently). > - Haven't really exhaustively tried to test band dependence of the behavior > because I don't have an antenna on the other bands at the moment and not > wild about trying to transmit into a big mismatch. So although it appears > 6m related based on my observations, that might not be exactly > representative of whats going on. > > Posting here in case I've given enough clues for someone to suggest what > may be wrong or how to narrow down further. > > Thanks, > Ben N1VF > ______________________________________________________________ > 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]
