I have my QCX voltage supply set to 13.8VDC. I set the amp supply voltage to 13.8VDC. R5 is fully CCW. SWR meter is a Heathkit HM-2102, 25 or 250W range. I can lower the amp power supply voltage and keep it on the 25W scale. 13.8VDC results in 30W on the 250W scale. Into an Oak Hills Research, kit built, 100W dummy load.
Hans' instructions for settings has an example current of 85mA for where to start. I've got 2.3A (2,300 mA).. Power supply current seems a bit high.