DT stands for Dragon Tiger Electronics and I think the only difference between the 30s and 40s is the amp. There may be a slight difference in the galvos, themselves but like you, I can't find the difference. Maybe they are all the same and the ones that don't perform at the 40k level are marked as 30s, dunno. The DT40 wides are a different story.
I know with the PTs, Phenix Technologies, the 20s, 30s, and 40s are all the same galvos. The only difference is the amps. I have replaced a 40k PT galvo that went bad with a 20k one and after retuning the amp, I saw no difference in performace. They worked just the same. That leads me to believe that the only difference is the amp.
Last edited by absolom7691; 07-18-2014 at 12:59.
If you're the smartest person in the room, then you're in the wrong room.