[Elecraft] KPA1500 reduces power as it gets warmer?

[john at kk9a.com]

At high power the KPA1500 is the most efficient.  At lower power it will
generate the same internal heat or more.

John KK9A


Kevin Robertson KD2WCY

FT8 is a weak signal mode, designed for low power. Given its high duty
cycle, you are asking for trouble if you operate your power amplifier in FT8
mode using your KPA1500 at anywhere near high power. I burned out my final
on my K2 at 15 watts on FT8. 

73,
Kevin Robertson KD2WCY