Hi Andy I am thinking the reactance the antenna presents to the tuner may have something to do with it. Even though SWR shows about 3.7:1 it may well do with causing the issue. At 3.636 the capacitance is 719 and inductance is 2100. The only band I need a tuner is 80 meters. All other bands are resonant (I do not operate 160)
I've opened a service request on the web site as well as following up with a detailed email to support along with operating conditions and log file. The amp will need to visit home to get repaired and updated. Another KPA1500 user with s/n close to mine just got his back from repair and there were a few updates done to his that are definitely not done to mine. Dave wo2x -----Original Message----- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of Andy Durbin Sent: Monday, April 29, 2019 7:53 AM To: elecraft@mailman.qth.net Subject: [Elecraft] KPA-1500 input too high Was the KPA1500 tested at maximum output power and duty cycle with a loading condition that required drive power to be just below the level that would trip the "input power too high" monitor? Is it possible that certain loading conditions would require a drive power level high enough to overheat the input resistor? 73, Andy, k3wyc ______________________________________________________________ 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 ______________________________________________________________ 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
