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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
