Bryan, I suggest solving the low power output on 15/12/10 for the base K2. You should be able to achieve at least 10 watts on all bands. I don't believe that is your basic problem with the KPA100.
If the the KPA100 is self-oscillating, that is the first problem to tackle. Once you get that under control, other apparent problems may also disappear. I have not had experience with oscillations in the KPA100, so the best advice I can offer is to check all components and all soldering - it is not normal for the KPA100 to self-oscillate, in fact in my experience it is quite stable. Look carefully at the input circuit components and the transformer turns. The LPF is not the most likely culprit. 73, Don W3FPR > -----Original Message----- > > The K2 appears to work on all bands, albeit only 6 to 8watts out > on 15/12/15m, which I presume is ok, but maginal. When I connect > up my KPA100, output is 100w plus on the lower bands, but on > 15/12/10 m it is very low, and the system is self-oscilating > around 100MHz and the frequency is unstable. > > I would think that there was a problem in the KPA's LPF for those > bands, but I can't find anything wrong. I use Toroidguys > inductors, and all seems well as far as I can check. > > Has anyone had a similar experience I wonder. Does the low > output from the K2 cause this problem > > Thanks > > 73 Bryan G3AKF > _______________________________________________ > _______________________________________________ Elecraft mailing list Post to: [email protected] 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
