In my experience for the amplifier gain to be
flat across a band it requires the output SWR to
1.1:1 or better. So the solution is to use the
internal tuner on all frequencies that you do not
have a perfect match. I have manually tweaked
(with amp in standby and running 50W) my auto
learned atu settings to get as close to 0W
reflected power as possible. It takes a while to do this but its worth it.
- Paul; KW7Y
At 08:29 AM 11/18/2019, N4ZR wrote:
Here's one that I kept running into. My
K3/KPA-1500 when operating at one end of the
band on 40 and 80, would work fine, but when I
went to the other end I found that often I
would be running over 1500 watts, and sometimes,
the result would be reflected power exceeding
200 watts, causing a fault. For those of us
who have the Aux port cable connected, wouldn't
it be pretty simple for the KPA-1500 to turn
down the K3's power to limit output to 1500
watts? -- 73, Pete N4ZR Check out the Reverse
Beacon Network at <http://reversebeacon.net>,
now spotting RTTY activity worldwide. For spots,
please use your favorite "retail" DX cluster.
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