[Elecraft] K3 remote power on.

[Bruce Nourish]

I do basically the same thing to control my KX3 when I'm on holiday. The
info I needed is on pages 5 and 28 of the KX3 manual: briefly assert 9V on
the PTT ring of the mic plug. From skimming the K3 manual, it looks like
the K3 is even easier: just (briefly, I assume) ground the PTT line on the
ACC port.

My shack radio is a Raspberry Pi. When I need remote power on, I breadboard
up a simple relay circuit that allows one of the Pi's GPIO pins to control
a 9 V battery. I use TRRS/TRS breakout adapters to pass through audio
unchanged, while connecting the PTT ring to the output of that relay. Then
a have a trivial Python program on the Pi that briefly asserts that GPIO
pin.

On Tue, Apr 19, 2016 at 4:46 AM george allen <k2cm.george at gmail.com> wrote:

> I use an Arduino connected to the internet using the Arduino internet
> shield. The Arduino sets a relay on/off as desired, to turn my radio
> on/off. It also connects/ disconnects my antenna.
>
> Sent from my iPad
>
> > On Apr 18, 2016, at 10:35 AM, Randy Boates <rboates at incentre.net> wrote:
> >
> > I am interested in a way to remotely power on a k3 or k3s without the
> remote rig boxes. Nice apps already exist to remotely operate the kat500
> and kpa500. Any suggestions?
> >
> > Why? Remote operation of my second k3 for digital modes.
> >
> > Assistance appreciated.
> >
> > Randy
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