Mine does the same thing except only when the PR6 (six meter preamp with the "ON" control jumper in the correct position for the K3) control is plugged into the ACC jack. I surmise that that possibly D4 (the diode that was added for the reported MOD: http://www.elecraft.com/K3/mods/KPA3_12V_Sense_Modification_Rev_B.pdf ) is bad... and they may have had a bad batch of them... I've not had time to take the radio apart and diagnose this completely. It should not hurt the radio to use it as is though. What you can do is remove the fan panel (4 screws on the back) and measure the voltage at pin 11 of connector P68A after you have turned off the radio. If it's more than 0.6 VDC the diode is bad.
<<< Please help. Last night my K3 worked perfectly. Power supply voltage 14volts and always shut off after rig. This morning, turned on power supply, k3 turns on by itself. Pushing the power button only blanks the screen, display backlighting stays on. What can cause this, tried unplugging everything then repeating, same result. Please help, love the rig. Serial 4548. Looking forward to your reply, Coy K3FO >>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ Owner - Operator Big Signal Ranch Staunton, Illinois email: [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
