[Elecraft] KPA500 Faults, ATTEN REL

[Forest Summers]

I have KPA sn 666 on the air! I purchased the kit. Assembly took 6 hrs. I had
some initial FAULT conditions that showed a HIGH SWR. I am running the amp
through a Palstar AT1500DT, into an HF9V Butternut vertical, ground mounted.
I also have a TH3MK3 beam. I suspected a ground loop, so, I improved my
ground system and have only had very few FAULT conditions since. The KPA500
SWR bar graph is what I use to tune with, SWR being 1.1:1, with one SWR
segment lit. I also started having POUT HI Faults, (yesterday, after using
the amp for a two days.) I drive it with 15W, (I want to go easy on it
breaking it in)  These FAULTs were occuring when the amp was switched from
BAND to BAND, using either the K3, or KPA500. Also, these FAULTs would occur
when switching from OPER to STBY and STBY to OPER, but not every time. What
could be causing this to occur? I did adjust the ATTEN REL setting to 2
(DEFAULT is 3), and this seemed to cure the FAULTs. Is this common?
 I love the little amp, I enjoyed building it and it is a great addition to
the K3! I do have the AUXBUS between the two.  Any thoughts would be
appreciated.  Thanks  Forest  (Gene) 

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