I need to calculate the transformer VA for bipolar regulator circuit using LM723 so I need the voltage drop or may be a headroom for LM723 under load. The data sheet is silent about it. Is there anybody who had an experience building LM723 based PSU to answer this question?
The data sheet specifies a minimum input-output differential of 3.0V, so to that add Vbe for the emitter follower. 1V additional should be adequate up to a couple of amperes out, so figure on 4V.