Quote Originally Posted by albada View Post
The "ready" light comes on in electronic flashes when the capacitor is about 1/2 or 2/3'rds charged. Furthermore, the maximum voltage applied to the capacitor depends on how charged your batteries are; i.e., the voltage of the supply. So for consistency, I suggest (1) waiting at least one minute after the "ready" light lights up, and (2) powering the unit from AC instead of batteries.
Meh. If I measure the output of any of my flashes (Minolta 5600 and Bowens 1000DX), they are consistent shot-to-shot within the 1/10 stop resolution of my flash meter, which is IMHO quite good enough when you're testing against a wedge with 1/2 stop resolution. I'd expect any high-quality thyristor flash to be as good as mine.