I originally posted this in July and I still have the problem. The issue is as described below past the dashed line. Note that the issue happens even if I haven't been transmitting.
Don Wilhelm helped me attempt to troubleshoot the issue. We eliminated the base K2 as the source. After that, at Don's suggestion, I installed the KPA100 upgrade kit - no success. At this point we gave up. Recently I replaced D16 & D17 on the KPA100 after reading about similar problems caused by the damaged diodes. Still no luck. Has anyone out there had a similar issue? 73, Jim Elmore WA4YWM ------------------------------------------------------------------------------------------ I have a K2 serial no. 4729 with the 100W amp which I have been using for almost 10 years. It recently developed a problem with the following 2 symptoms: 1. After operating for some time (perhaps 1-2 hours) the Tune function will begin to display 1 W with a 1.0-1 SWR on all bands. It normally displays 22-23W with the correct SWR shown. 2. At the same time, if I attempt to transmit, the K2 will apparently begin to draw too much current and it shuts down and re-starts. The Tune function also shuts the K2 down at this point. I observed the same behavior on a dummy load - to eliminate an antenna or feedline issue. I also left the power supply on while letting the K2 cool down to see if the supply was the source of the problem. Apparently not since the K2 would operate for a significant time after turning the K2 back on. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-w-KPA100-power-resets-after-approximately-2-hrs-of-turn-on-time-tp7610298.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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]
