The problem with my K3 is actually a Voltage sitting on the ALC output of the KPA500 all the time (circa 9 Volts), even with just the mains turned on via the rear panel switch. As a "work around" I've turned off external ALC with the K3 menu and it behaves itself.
No idea why there should be a steady DC Voltage on the ALC, it clearly upsets the K3 (symptom - flashing CMP/ALC on K3 when on transmit). The Voltage is present on the ALC phono socket without the aux cable connected and also present on pin 15 of the aux cable. An email has been sent to Elecraft Support... 73 Dave, G4AON ______________________________________________________________ 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