I've had the same problem with #1239. I have made some observations about it.
1) It does not involve the KPA3. 2) The behavior is as if the power had been set to 0.0 by a program bug. Cannot hear the carrier externally on CW -- when it's working I CAN hear the carrier with power set to 0.1 w on the K2 setting next to it. When it's working and I set power to 0.0 I do NOT hear the carrier on K2 setting next to it. When power is at 0.0 I still hear some VERY low level phase noise or keying artifacts. When the trouble is in effect, I still hear the keying artifacts. I have several times caused the power to return by simply putting the rig in TUNE and leaving it there. It will come back to power over a long interval (5 minutes?) in a very jerky manner and suddenly kick in at 100 watts from somewhere in the 5-6-7-8 watt range. Idea here was to burn it in or burn it out. But neither happens, and it happens semi-randomly -- Seems to happen mostly when turning it on after cooling off overnight. Could this really be an ALC bug? Is there a diagnostic we can run, or a test procedure to further isolate this trouble? Would really love to solve this before the contest season. Guy. Jim Brown-10 wrote: > > On Sun, 17 Aug 2008 09:36:04 -0700 (PDT), Ed Schuller wrote: > >>I was using my K3 in the NAQP contest yesterday > > Hi Ed, > > My K3 is about two months old. Just before NAQP CW, I left it on > overnight, having verified that everything was working with N1MM and > SO2R (with the MP) the night before. When I came in the shack an > hour before start time Saturday morning, I had no RF out at all, but > the keyer/paddle made sidetone. By the time I had finished > troubleshooting, the keyer had stopped working. It's currently in > line for repair in Aptos. Initial diagnosis is that the 10W power > amp died. > > 73, > > Jim K9YC > > > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://n2.nabble.com/K3-Stopped-Transmitting-tp729481p731191.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
