Same thing here.  It began right after I had upgraded to 436 but I had a 
feeling it might be RF getting into the power supply, an Astron over 20 
years old.  Haven't checked the voltage under load yet but will do so.  lou
----- Original Message ----- 
From: "John/K8AZT" <k8azt...@sbcglobal.net>
To: <elecraft@mailman.qth.net>
Sent: Friday, May 27, 2011 11:25 AM
Subject: [Elecraft] K3 shutdown


> My K3 sn1693 has just started exhibiting a troubling problem.  Operation 
> in CW
> when I put key down, the rig shuts off completely.  When turning back on, 
> it
> forgets frequency that was set just prior to shut down.  I thought this 
> might be
> rf in shack, so tried with dummy load and same problem.
>
> Any suggestions or has anyone else experienced this behavior?
>
> 73,
> John/K8AZT
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