Mike,
May I suggest you inspect all the connections in your antenna system.
There are connections that may be just fine at 500 watts, but will
either break down or arc over at 1500 watts.
What happens if you drive the KPA1500 only to 500 watts? If it behaves
the same as it does at 1500 watts, then you may have a problem with the
KPA1500, but if things behave normally at 500 watts, then look at your
antenna system.
73,
Don W3FPR
On 4/29/2018 10:13 AM, Mike Crownover wrote:
I have noticed that after my KPA1500 gets above 50C the SWR indicator light
starts to show intermittent high SWR. My KPA500 did not do that. I'm using
resonant yagis and the digital SWR meter shows 1.1:1 and doesn't change nor
does the SWR indicator on the K3S. It seems the SWR indicator lights are acting
independent of the meter on the KPA1500 screen. RF? I have not had any faults
or shut downs as a result of the indicated high SWR. The amp operates
wonderfully, but the indicator lights are a bit bothersome. Anyone have similar
issues?
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