John, I believe the problem is entirely in your KAT100.
Check all your connecting cables first thing (do a continuity test on both the center conductor and shield and check for shorts). It sounds like your tuner is operating into an open circuit or a shorted one. If you have an antenna analyzer, check each cable with it while connected at the far end to a dummy load. After checking the cables, if you still have problems, try re-calibrating the wattmeter in the KAT100. Also check the soldering in the KAT100 control and wattmeter sections - particularly RP1 and the pins of U3. In fact check all the soldering in the KAT100. Pins 6 and 7 of U3 must go to a low level (to scale the wattmeter readings) when high power is active. Check to be certain that is happening and that the low level scaling signals are getting to pins 2 and 4 of RP1. 73, Don W3FPR > -----Original Message----- > > > I had been having problems with my KAT100 and hoped the KPA100 upgrade > would help. I installed the upgrade and all works well with an external > tuner other than the KAT100. But, the KAT100 problems persist. > > Here's the problem. The KAT100 tunes fine on all bands into my 50 ohm > dummy load if I set the power to 10 watts. But, if I set it to 11 > watts, engaging the KPA100 build into my K2, the bands 160m through 40m > won't tune correctly. > > _______________________________________________ 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
