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6400 Lower Output and Higher PA Temp on 10 & 12m

W4RXK
W4RXK Member ✭✭
in FLEX-6000 Signature Series

Using a MyAntenna's 80-10m antenna w/the integrated tuner on - SWR 1.2.

Running FT8 10m at RF Power of 60 and 70 watts really heats up the PA, if more than a few minutes, temperature is greater than 160 F. The fans kick on and spin faster to compensate.

The same on 12m isn't as bad. 10m sees the highest voltage drop and highest temperature.

6m on a resonant dipole is not affected. 10m is the worst …

What would cause this?

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