Rise in temp and decrease in power?

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today while working CW qso, my 6400M went from 26.3C to 60C and power output decreased. The swr was 1.3.1 and Voltage was 14.1V key down. Does that sound normal? If that is cw, what would it do in digital?
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Posted 2 years ago

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Tim - W4TME, Customer Experience Manager

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Official Response
Yes, that is normal for any amp.  Efficiency is a function of temperature.