[Elecraft] K3 Remote Power On/Off Ron Castro

[Ed]

What Don, W3FPR, Stated is the correct way to handle the power on/off 
function.  Pulling power from the K3 without an orderly shut down is 
very risky and reloading the firmware and configuration files remotely 
could prove to be a chore.

I use the macro to shut things down.  After the shut down I then shut 
off the power supply.  To power up I use a relay with an R/C time 
constant wired across the 12v power buss.  When the power supply powers 
up this relay bumps pin 8 of the accessory socket with a ground pulse 
telling the K3 to power up.  The pulse timing isn't anything close to 
critical.

All this makes the 12v power control a little messy when dealing with 
remote control.  Problem is, I haven't been able to come up with 
anything simpler.  Some of the remote control program out there will 
issue the power down command to the K3 when you close the program, but 
not all of them do this.  You still have to deal with powering up the K3.

Ed, K6ED