[Elecraft] PA temperature issue (CAL tPA)

[Douglas Westover]

This happens to my KPA100 from time to time.
Upon investigation the tpa value is always 255
and the problem is solved by resetting it to
room temperature. I haven't been able to
correlate this to any actual temperature changes
as the temperature in my shack probably doesn't
vary more than (+, -) 7 or 8 degs F.

What I DO notice is that it usually occurs after a
tune cycle that requires the KAT100 to do more
switching than normal. My guess is that it has to
do with a high SWR condition (hence the Hi Refl
message also) that somehow causes all of the
bits in the tpa register to get set. This assumes
an 8 bit value for tpa.

My KPA/KAT 100s are in a separate EC2 enclosure.

73,
Doug
W6JD
K2 #1626

----- Original Message -----
From: "wayne burdick" <n6kr at elecraft.com>
To: "Jim Brown" <jimbrown.enteract at rcn.com>
Cc: <elecraft at mailman.qth.net>
Sent: Thursday, June 10, 2004 9:25 AM
Subject: [Elecraft] PA temperature issue (CAL tPA)


> I haven't been able to duplicate this yet, but given the recent input,
> I'll have another crack at it, this time using my refrigerator. I'll
> post an update when I find the solution.
>
> 73,
> Wayne
> N6KR
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/elecraft
> You must subscribe to post.
> Subscriber Info (Addr. Change, Unsub etc):
http://mailman.qth.net/subscribers.htm
> Elecraft page: http://www.elecraft.com