[Elecraft] K3 Not Turning Off

[Ed Muns]

> My K3 will no longer turn off.  The LEDs on the front panel 
> won't go off, and all the lettering on the Liquid Crystal 
> Display will disappear but the LCD will still be backlit.
> 
> I've traced it down to the 15pin accessory plug; all I have 
> attached to it is a 1 transistor keying circuit to key FSK on 
> Pin 1.  If that plug is attached, the K3 won't shut off.  If 
> that plug is not attached, the K3 shuts down normally.
> 
> Will the 12V sense mod allow me to leave the 15pin plug in 
> and still shut down K3 properly?
> Or should I try a different circuit to key FSK?

Do the 12V sense mod.  It is easy and quick and should solve this problem.
My 1-transistor FSK keying cables are permanently connected to the K3 ACC
jacks.

Ed - W0YK