[Elecraft] KPA500 shutting down

[Michael Walker]

Thanks Jack for taking the time to reply.

No faults are shown on the GUI.  There is no connection to Pin 8 of the Aux
connector either.

I will try to pull a dump tonight when I get home.  I will also do a trap
on the serial line to see if I can capture any data during a failure.  That
will hopefully point us in the correct direction.

73, Mike va3mw


On Tue, Nov 22, 2016 at 11:40 AM, Jack Brindle <jackbrindle at me.com> wrote:

> Mike;
>
> There is no event in the firmware that should cause power down other that
> activating the power on/off signal, either through the front panel button
> or the AUX/IO signal. Having said this, obviously something is going on.
> You don’t report any faults being shown, but that doesn’t mean there
> aren’t any. Is there anything anomalous that you are seeing other than the
> KPA powering off? Is there any connection to pin 8 of the KPA’s AUX
> connector? If so, it could be triggering the power-off.
>
> Let’s try to gather more information to determine what is going on. If you
> can capture a current fault dump using the KPA Utility I will analyze it to
> see what it might reveal. I don’t know if you can get that remotely, but it
> is worth a try.
>
> 73,
>
> Jack Brindle, W6FB
> Elecraft Engineering
>
> > On Nov 22, 2016, at 7:31 AM, Michael Walker <va3mw at portcredit.net>
> wrote:
> >
> > Not an SWR issue.  I can see the SWR on the KPA500 and on the external
> W2.
> > Both would alarm if the SWR got above got above 3:1.
> >
> > At least, for the moment, I have eliminated that.
> >
> > It could be breakdown in an antenna switch, but that would again show up
> as
> > something other than the until powering off and on.
> >
> > Yes, it does seem like RF, but when nothing has changed in a year (and I
> > mean nothing), I have to set that aside too until I have eliminated a few
> > other things.
> >
> > I appreciate the idea though.
> >
> > Mike va3mw
> >
> >
> > On Tue, Nov 22, 2016 at 10:24 AM, Bill <w2blc at nycap.rr.com> wrote:
> >
> >> First thing that comes to mind - high SWR.
> >>
> >> Bill W2BLC K-Line
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