[Elecraft] KPA500 shutting down

[Jack Brindle]

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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