If I've understood the datasheet correctly the specified minimum gain for the H1061C is 100 at a current of 1A, dropping to only 35 at 100mA. So I'd guess it would be about 50 at a current of ~220-250mA as in the circuit in post #19. That means your '1V' signal might have to supply about 250/50 = 5 mA. Can it do that? If so, then the H1061C will do the job.