You likely blew one of the Caps in the Low Pass filter.
If you open it up and have a look, you will clearly see the damage.
I've seen this done before on a friends that I had to repair for him.
I just replaced the blown parts and then swept it with a VNA to ensure it
was still operational.
Last night I was trying to work 80m for the first time in a while, and my
KPA500 faulted. I was tired, and didn't pay attention to the fault code but
simply cleared it and tried again. After a couple of rounds of this, I smelled
something burning and shut off the amp for the night.
This morning
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