K3 power error

[Peter-64]

Hi

My K3 has a strange behaver on out output Hf power
When start a transmitting in a carrier mode (e.g. Cw or FSK rtty) there
is an output peek above the power level  have set.
Also when transmitting around 30-40 watt range there are short burst of
power up to 80 watt. The build-in RF meter shows those peeks too.
There is a noise coming out of the compartment of the KPA3 when this
toke place.

A close inspection of the KPA3 doesn't show any thing strange.

Any idea where to look at?

Peter
PC2A

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