During operation with a home-brew mag-loop antenna, my K3 (#1222) dropped power to just under 50W (by the display). There had been an occasional arc in the external loop tuner, so I'm assuming that was the cause of the K3 failure. Subsequently, running the 50W TX Gain Calibration, some bands pass but other do not. Pass-or-fail, however, power out on the dummy load shows more than 100W but K3's displayed power is on the order of 50W (definitely not right). Note that 5W TX Gain Calibration appears to work fine. During normal keying from a straight key, output power (seen on dummy load) ramps up quickly with KPA in operation and I get 100W out (on dummy load) when K3 display shows 40W. Because I'm getting full power on the dummy load, I'm thinking this must be something simple like a blown resistor in the metering path or gain-control circuitry. I get no error messages during operation and only get the TX Gain Failure message during calibration. I'd like to try a repair myself and would appreciate any counsel or direction. Thanks,Gary, AA0CL ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net
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