Tubes, I understand. Transistors are different, mysterious, and the arcane theory which grew up around them is no use at all. I have a mental model which gets me to an answer but I can't put it in words.
This guy has got it right:
http://www.satcure-focus.com/tutor/page4.htm
It even models breakdown voltage.
This guy has got it right:
http://www.satcure-focus.com/tutor/page4.htm
It even models breakdown voltage.