[Elecraft] [Elecraft_K3] KPA500 Stby flaw in V 1.23?

[Rick Bates]

Hi again,

I see that I wasn't clear enough for some folks as a few here and private
email have said a similar thing.  So here is the issue:  SOMETIMES with v
1.23 firmware, when changing bands, the amp will not drop into standby mode.
This setting is to protect the station from operator brain fade or
inattention.

The actual sequence of events appears to be unique to cause this.  I am
working with Elecraft on this and results are (of course) promising.  To get
a response on the same day from any company is amazing.  They must sleep as
little as I manage.  ;o)

While more testing is needed (and on the new, unreleased code) if anyone has
this issue, try a FULL KPA500 power down starting from the front power
switch (wait for the fan to stop) and including the rear switch (count to
ten, then fire it all back up) after the firmware update.  It may help, it
may not but new code is on the way.  So far, the complete power cycle has
resolved the issue but we're still testing to find the (subtle) cause.

73,
Rick wa6nhc

-----Original Message-----
From: Bill Hammond

I have KPA500 with 1.23 and KAT500 at 1.18 with radio at 4.60 with no
standby issues with the amplifier. 
73,
Bill
AK5X




On Jan 31, 2013, at 11:22 PM, Rick Bates wrote:

> 
> Hello all,
> 
> Today I upgraded the KPA500 from V 1.18 to V 1.23.  I now note the
following problem:  The amp does not go to standby on any band change.  I
went back to 1.18 to test this (it worked as described) and back to 1.23
(won't drop to standby).
>