[Elecraft] K3 power loss: Last settings forgotten

[Erik N Basilier]

Ron, I have been shutting down the external power rather than using the K3's
power switch hundreds of times, a habit I established with earlier radios.
I am comforted to know that you have also shut down your K3 in a similar
way with no ill effects. But one thing now comes to mind that I didn't think
about previously. Twice in several months of having the K3 I had a problem
where the radio seemed disconnected from the antenna and showed a high
swr on transmit. I jiggled the connector pins at the automatic tuner board
etc. to no effect. At the first instance, the radio just started working 
normally
after I used its power switch to power down and back on again. The second
time (months later) I had to reload the firmware to get back to normal.
Of course, there is nothing to say that either incident had anything to do 
with
how the radio was shut down, just something that came to mind. If there
were a chance of corrupting the firmware by unexpected power loss, then
it would have implications for portable operation where alligator clips
happily jump off of battery terminal posts etc.

73,
Erik K7TV

----- Original Message ----- 
From: "Ron D'Eau Claire" <ron at cobi.biz>
To: <elecraft at mailman.qth.net>
Sent: Sunday, March 01, 2009 11:04 AM
Subject: Re: [Elecraft] K3 power loss: Last settings forgotten


> And the K3 is pretty resistant to the sort of craziness some CPU's
> experience with unexpected shutdowns.
>
> I'm not aware of anyone who has had a "crash" of the system due to the 
> power
> being pulled unexpectedly. I've done it hundreds of times working with my 
> k3
> without any ill effects other than, as you noted, some front panel control
> settings may not be stored.
>
> FWIW that's true of the K2 as well.
>
> 73,
>
> Ron AC7AC
>