On what basis do you claim that Vbe and Vbc are both 0.7V. This is only true if Vce happens to be 1.4V. (Vce = Vcb+Vbe)It seems that everyone is still guessing.
Vbe and Vbc are both 0.7V. Vce is infinite when the transistor is not conducting, but Vce is very close to 0 when the transistor is saturated. The controller uses PWM to maintain the voltage.
Vce is infinite? Huh?
Why would you say that the controller of a LINEAR supply uses PWM?
Perhaps everyone else aren't the only ones guessing.