[Elecraft] KPA-1500 input too high

[rocketnj at gmail.com]

Hi Andy

I am thinking the reactance the antenna presents to the tuner may have
something to do with it. Even though SWR shows about 3.7:1 it may well do
with causing the issue.
At 3.636 the capacitance is 719 and inductance is 2100.
The only band I need a tuner is 80 meters. All other bands are resonant (I
do not operate 160)

I've opened a service request on the web site as well as following up with a
detailed email to support along with operating conditions and log file.

The amp will need to visit home to get repaired and updated. Another KPA1500
user with s/n close to mine just got his back from repair and there were a
few updates done to his that are definitely not done to mine.

Dave wo2x



-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of Andy Durbin
Sent: Monday, April 29, 2019 7:53 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KPA-1500 input too high

Was the KPA1500 tested at maximum output power and duty cycle with a loading
condition that required drive power to be just below the level that would
trip the "input power too high"  monitor?

Is it possible that certain loading conditions would require a drive power
level high enough to overheat the input resistor?

73,
Andy, k3wyc




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