Something you're missing, Wes. The 100W amp doesn't kick in until you ask for more than about 14W. So at 11-12W, you're seeing the IMD of the QRP exciter stage running near it's maximum power.

I'm wondering if it might be practical to modify the control software so that the 100W amp kicks in at lower power levels. Are there other consequences? Wayne?

73, Jim K9YC

On Tue,12/29/2015 8:19 PM, Wes (N7WS) wrote:
Something else to note, even at 14V, running a K3 at 11-12 watts is a disaster.

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