Dr. Schmidt,
I wonder if you were running with the newest BETA firmware for the K- Line?
I admit having the tuner start going into a tuning cycle as I was operating
also. I think I tested this while using a dummy load and still had the same
problem. So, I reasoned it was not RF related.
I usually put the tuner in manual mode while operating to prevent auto mode
from an inadvertant start up.
Some have never had this problem with their K-Line, so since the problem is
not universal, it will be much harder to fix.
Toby K4NH
----- Original Message -----
From: "Dr. William J. Schmidt, II" <[email protected]>
To: <[email protected]>
Sent: Sunday, February 09, 2014 7:51 AM
Subject: [Elecraft] Warning!
Well last night while chasing some DX I experienced the same mysterious
antenna tuning behavior that others have reported with the KAT500 where
the
tuner just "takes off". I had this happen on 40 meters while working 40
meters over xmas down on PJ4 and saw the KPA500 amp emit a nice thick
cloud
of black smoke. The amp still worked, but last night it did the same
thing.
and now 40 meters the KPA500 does nothing. 10-50mhz is ok (have not tried
1.8-5 yet . no antenna). But when on 40. not even the SWR indicator
works.
I think it roasted the filter section but I'll let Elecraft figure that
out
since I'm flying without schematics. I'll call and send them the power
brick on Monday. Antenna was 1.2:1 swr the whole time. Just be careful
out
there!
Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
Owner - Operator
Big Signal Ranch
Staunton, Illinois
email: <mailto:[email protected]> [email protected]
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