K3 Remote Power On/Off

[Ron Castro]

I'm setting my K3 up at a remote facility where I can turn the 12 VDC power
supply on and off remotely, but if I turn it off, the K3 shuts down and
can't be started without using the Remote Power On/Off on pin 8 of the ACC
connector.  My question:  Since I will be using the power supply to turn the
radio on and off, can I simply short pin 8 to ground and leave it that way
so the radio comes on when the power supply activates?  Is there some reason
why I should do this differently?

Thanks,
Ron
N6IE

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[Mike Dodd]

On 5/30/2016 8:36 PM, Ron Castro wrote:
> I'm setting my K3 up at a remote facility where I can turn the 12 VDC power
> supply on and off remotely, but if I turn it off, the K3 shuts down and
> can't be started without using the Remote Power On/Off on pin 8 of the ACC
> connector.  My question:  Since I will be using the power supply to turn the
> radio on and off, can I simply short pin 8 to ground and leave it that way
> so the radio comes on when the power supply activates?

And goes off when the power supply deactivates?

> Is there some reason why I should do this differently?

Read the user manual. Elecraft recommends ALWAYS powering-off the radio
while the power supply is still on, so various settings and
configurations are properly saved.

There's no way to guess if anything else in this SDR could be
bollixed-up if you kill the power while the radio is turned on.

--
73, Mike N4CF
Louisa County, VA USA
Elecraft K3s/100
Carolina Windom up 45'
http://n4cf.mdodd.com
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[Jim Brown-10]

On Mon,5/30/2016 5:36 PM, Ron Castro wrote:
>   Is there some reason why I should do this differently?

Yes. When you turn the K3 off with its power switch, it writes current
conditions to its RAM. When you turn it back on, it loads those
settings. When you drop power to the K3, that write doesn't happen, so
it comes up with whatever was last saved.

There are folks at Elecraft who are VERY familiar with the ins and outs
of remote operation in general and control of the K3 in particular.
Whatever issues you're running in to, they've seen it before and can
suggest good options. I heard one of them give a dynamite talk to the
Saturday morning tech gathering of the Santa Cruz club a few months ago.
Your best bet is to pick their brains on this issue.

73, Jim K9YC


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How do you save the current settings?  I think most of us at some point in
our lives have had a power failure while operating.

John KK9A

Jim Brown jim at audiosystemsgroup.com
Mon May 30 21:56:46 EDT 2016


Yes. When you turn the K3 off with its power switch, it writes current
conditions to its RAM. When you turn it back on, it loads those
settings. When you drop power to the K3, that write doesn't happen, so
it comes up with whatever was last saved.

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[Jim Brown-10]

On Tue,5/31/2016 4:22 AM, [hidden email] wrote:
> How do you save the current settings?  I think most of us at some point in
> our lives have had a power failure while operating.

Turn the K3 off with its power switch and turn it back on. You will, of
course, have to do that each time you change settings. :)

73, Jim

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[Don Wilhelm]

The K3 (K3S) can also be turned off safely (and store the current
settings) by using the PS0 command - see the Programmer's Reference.
That command cannot be used to turn it on (there is no power to the K3),
so the POWER_ON pin in the ACC connector can be pulled low by an
external device.

If you simply pull power, the current settings will not be saved, and
could result in having to reload the firmware to get it going again.

73,
Don W3FPR

On 5/31/2016 8:41 PM, Jim Brown wrote:
> On Tue,5/31/2016 4:22 AM, [hidden email] wrote:
>> How do you save the current settings?  I think most of us at some
>> point in
>> our lives have had a power failure while operating.
>
> Turn the K3 off with its power switch and turn it back on. You will,
> of course, have to do that each time you change settings. :)
>

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[Don Wilhelm]

I forgot to add that if you permanently connect the ACC POWER_ON pin to
ground, you will not be able to turn the K3 off with the PS0 command.
It may glitch to a power off state, but will come back on almost
immediately.

73,
Don W3FPR

--------------------------------------------------------------
The K3 (K3S) can also be turned off safely (and store the current
settings) by using the PS0 command - see the Programmer's Reference.
That command cannot be used to turn it on (there is no power to the K3),
so the POWER_ON pin in the ACC connector can be pulled low by an
external device.

If you simply pull power, the current settings will not be saved, and
could result in having to reload the firmware to get it going again.

73,
Don W3FPR

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[riese-k3djc]

   
I used to just cut power,, but the K3 really didnt like that
but I got away with it,,,, always turn off before cutting power

Bob K3DJC


On Tue, 31 May 2016 22:37:02 -0400 Don Wilhelm <[hidden email]>
writes:

> The K3 (K3S) can also be turned off safely (and store the current
> settings) by using the PS0 command - see the Programmer's
> Reference.
> That command cannot be used to turn it on (there is no power to the
> K3),
> so the POWER_ON pin in the ACC connector can be pulled low by an
> external device.
>
> If you simply pull power, the current settings will not be saved,
> and
> could result in having to reload the firmware to get it going
> again.
>
> 73,
> Don W3FPR

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[Vic Rosenthal]

Doesn't the K3 automatically save settings every so often via a timer? So it would only revert to an earlier state if the power fails 'shortly' after making a change.

Vic 4X6GP

> On 1 Jun 2016, at 3:41 AM, Jim Brown <[hidden email]> wrote:
>
>> On Tue,5/31/2016 4:22 AM, [hidden email] wrote:
>> How do you save the current settings?  I think most of us at some point in
>> our lives have had a power failure while operating.
>
> Turn the K3 off with its power switch and turn it back on. You will, of course, have to do that each time you change settings. :)
>
> 73, Jim
>
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[Bill Steffey NY9H]

since there IS something in the K3, looking for that power button press,
could not also look for a double hit on some unused serial line ???
That the remote software could employ?


i have had my k3 turned off while remoting,.,,,  multi times...
once i called home and my wife gladly turned it back on...
    she said  'Oh you mean the radio I just turned off.....'.

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['DGB']

Very simple with Elecraft's hosting utility.

73 Dwight NS9I


On 6/1/2016 4:19 PM, Bill Steffey NY9H wrote:

> since there IS something in the K3, looking for that power button press,
> could not also look for a double hit on some unused serial line ???
> That the remote software could employ?
>
>
> i have had my k3 turned off while remoting,.,,,  multi times...
> once i called home and my wife gladly turned it back on...
>    she said  'Oh you mean the radio I just turned off.....'.
>
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>
>

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