Actually, the part is an AD744JN, don't know how I got that number in there, but I'm using the correct part. 
Yes, the 24V power is regulated, it's a 1A supply. The original prototypes had a 700ma supply, but the 1A seemed like a good idea. I compared it to a 2A supply, and there was no difference in operation between the two driving a 50 ohm load.
