[Elecraft] K3 not transmitting anymore

[Geoffrey Mackenzie-Kennedy]

Joe,

Many thanks for your help.

I had been toying with the idea of buying a K3 for use at another QTH, but 
there the mains supply is not 100% reliable. If bad things can happen if the 
13.8V supply shuts down as the result of a mains outage, that is serious.

73,
Geoff
GM4ESD


Joe Planisky wrote on Sunday, June 07, 2009 5:45 PM

> From the owners manual (page 44 in rev D2):
>
> "Remote Power On/Off
>
> A remote-control system can pull the POWER ON line to ground (ACC 
> connector, pg. 18) to turn the K3 ON.  To turn it OFF, the controller 
> must send the K3 a "PS0;" remote-control command via the RS232  interface, 
> then deactivate the POWER ON signal.  This sequence ensures  that 
> nonvolatile memory is updated correctly before shut-down."
>
> Note that it doesn't say how long it takes to update the NVRAM after  the 
> above process is completed.  In other words, how soon after  deactivating 
> the POWER ON signal can I shut down the 13.8V supply?
>
> 73
> --
> Joe KB8AP
>
>
> On Jun 7, 2009, at 9:10 AM, Geoffrey Mackenzie-Kennedy wrote:
>
>>
>> Is there any interface available on the K3 which would allow an  external
>> automatic protective shutdown system to meet this requirement,  rather 
>> than
>> having to press the POWER button by hand?