Bob, K4TAX found the code's interpretation.
The fact that the problem healed itself after
a time suggests a thermal sensitivity.
I would try the radio from a cold start into
a dummy load, and check for the error
code/high SWR reading with TX PWR
set first to less than 11 watts, then again
with TX PWR set to 50 watts. Keep
repeating that experiment periodically
over a couple hours.
The high SWR indication would not emanate
from failed transistors in the PA - the SWR
measurement circuit is the last in the chain
to the antenna connectors unless you have
the inboard ATU option.
73,
Mike, K8CN
From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> on behalf of Bob McGraw - K4TAX <rmcgraw@...>
Sent: Saturday, November 19, 2022 3:43 PM
To: Elecraft-K3@groups.io <Elecraft-K3@groups.io>
Subject: Re: [Elecraft-K3] K3S Error KP1
CAUTION: This email originated from outside of the University System. Do not click links or open attachments unless you recognize the sender and know the content is safe.
From the KPA500 manual, "if the K3 interface cable is used to connect the KPA500 to the K3 the fault numbers will be displayed briefly on the K3 LCD display". Could this be a contributing factor? The KP1 means "excessive power output or excessive
reflected power".
73
Bob, K4TAX
