Using a voltage reg as an amp

A couple post back I gave some AF amps using TL431 regulator. This one should work with a 78L05. I'm posting it here before I lose it. To many projects not enough time and they seem to fall between the cracks if I don't make a note to come back to.

EDIT:
I put a notebook on my desk. The note says.
See blog post,using a voltage reg as an amp.