[Elecraft] KX3 KXPA100 into Ameritron ALS-600S

I want to run my just-born KX3 and it’s 100-watt companion KCPA100 into a high power linear, my Ameritron ALS-600S. But we have some issues. For instance: the combo easily produces 600 watts CW. But, on SSB it far too easily trips the Ameritron load fault, or the KXPA100 high SWR shut down.

Re: [Elecraft] KX3 KXPA100 into Ameritron ALS-600S

I can tell you that I had similar problems when I tried to do this with the K2 back before the K2's 100-watt KPA100 was available. I tried using an external 100-watt solid-state amplifier (good quality, made by Henry Radio) to drive a one-kW linear. Sometimes it worked, but sometimes there was