So that would be a yes? The fets are working half as hard if everything else remains the same.

So..how do you change the load resistance in practical terms if you want to..make it grunt. 1/2 the turns on the output transformer primary or?

Don, Power is square law so reducing the primary by half or doubling the secondary would double the voltage and with the same load would also double the current giving four times the power. So change the turns by root 2 or .707 less primary or 1.414 more secondary to double the power.

73s Nigel