[Elecraft] KX3 power reverts from 10W back to 5W

[Arno Dienhart]

So I had set up in the park, with a charged 12V 17Ah battery connected. It
was a hot day but I was in the shade.

 

Every time I set power level to 10W and keyed the TX, it reverted back to 5W
instantly. Why?

 

The Volt meter showed 12.3 V at RX and dropped to 11.7V at TX. Was that the
reason (getting below 12V)?

Was the PA getting too hot? It never went below 5W.

 

Thanks for any tips,

 

73,

 

Arno