Pete,
I don't run my amp at full legal limit on digital modes, but typically set the
input power for about 1000 watts output. One of the interesting characteristics
of the amp is increased efficiency as power increases. At 600 watts efficiency
is only 38%, whereas at 1000 efficiency increases to 50% and at 1500 watts to
60%.
(see screenshots)
-larry (K8UT)
------ Original Message ------
From: "N4ZR" <n...@comcast.net>
To: "Elecraft List" <elecraft@mailman.qth.net>
Sent: 2019-08-29 07:59:23
Subject: [Elecraft] KPA-1500 on digital modes
Elecraft's published specs rate the KPA-1500 for 1500 watts output on all
modes. In prepping for this weekend's contest, I've been running it at closer
to 700 watts, because I've found that even just running on CW, with its much
lower duty cycle, my amp reaches 70C quickly. I don't do that much digital
contesting, though, so I'm wondering whether 1500 watts output is on digital
modes is realistic or a recipe for trouble.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
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For spots, please use your favorite
"retail" DX cluster.
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