Joe,
The gain of any amplifier will not be constant across all bands.
If you are driving with the K3, there is a per band power setting so you
can compensate. See page 27 of the K3 manual.
73,
Don W3FPR
On 12/18/2016 6:08 AM, Joe Hutchens AJ8MH-Radio wrote:
This is a question I've been wanting to ask...
I've had a KPA500 for 4 years and I've noticed that 20 meters requires
more drive. Most bands require 30 watts or less, but 20 requires 35-37
for 500 watts out. In the phone portion of 20, an SWR of 1.4:1 WILL
cause a fault. It's just real sensitive to the load on 20. I have to
use a tuner and make sure I'm close to 1.1:1. Works fine into a dummy
load, but high drive is still required.
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